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iii Catalyst 3550 Multilaye r Switch Software Configu ration Guide 78-11194-03 CONTEN TS Preface xx vii Audienc e xxv ii Pur pose xxvi i Organi zation xx viii Conv enti ons xxx Rela te d Publicati on .
Cont ents iv Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Underst anding CLI Message s 2-4 Using Comma nd History 2-5 Changin g the Command Histor y Buffer Size 2-5 Recal.
Content s v Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Tool Ti ps 3-27 Online Help 3-27 CMS Window Compon ents 3-28 Host Na me List 3-28 Tabs, Li sts, and Tables 3-29 Ic.
Cont ents vi Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Schedul ing a Reload of the Software I mage 4-17 Config uring a Schedu led Reloa d 4-17 Displa ying Scheduled Re.
Content s vii Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 CHAPTER 6 Administ ering the Swit ch 6-1 Preven ting Unauthori zed Access to Your Swi tch 6-1 Protec ting Access.
Cont ents viii Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Managing the System Ti me and Date 6-32 Underst anding the Syste m Clock 6-32 Underst anding Network Ti me Pro.
Content s ix Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 CHAPTER 7 Configur ing 802.1X Po rt-Based Authent ication 7-1 Underst anding 802.
Cont ents x Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Config uring IEEE 80 2. 3X Flow Control 8-16 Adding a De scription for an Interface 8-17 Moni tori ng a nd M aint.
Content s xi Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 802.1Q Co nfiguration Consid eratio ns 9-24 Defau lt Laye r 2 Et he rn et Int erfa c e VL A N Co nf ig ura tio n .
Cont ents xii Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Learni ng State 10-7 Forw ardi ng S tat e 10-8 Disabl ed State 10-8 STP Addres s Management 10 -8 STP and IE EE 802.
Content s xiii Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Config uring Root Gua rd 10-36 Enabli ng EtherC hannel Guard 10 -37 CHAPTER 11 Configur ing IGMP Snooping and M.
Cont ents xiv Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Config uring Port Bloc king 12 -6 Blocki ng Flooded Traf fic on an Interf ace 12-6 Resuming Normal Forwa rding .
Content s xv Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Config uring SPAN 15-6 Defaul t SPAN Configurati on 15-7 SPAN Confi gurati on Gui delines 15-7 Creat ing a S PAN .
Cont ents xvi Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 CHAPTER 18 Configur ing SNMP 18-1 Underst anding SNMP 18- 1 SNMP Vers ions 18 -2 SNMP Manage r Functions 18-2 S.
Content s xvi i Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Time Range Applied t o an IP ACL 19- 25 Commented IP ACL Entr ies 19-25 ACL L ogg ing 19- 26 Config uring VLAN.
Cont ents xviii Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Config uring the Tru st State on Ports with in the Q oS Domai n 20-22 Config uring the CoS Va lue for an I nt.
Content s xix Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Underst anding Load Bala ncing and Forward i ng Meth ods 21-5 Config uring EtherCha nnel 21 -7 Defaul t EtherCha.
Cont ents xx Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Config uring IGRP 22-30 Load Ba lan ci ng an d Tr affi c Di st ri bu tion Cont ro l 22-31 Split H or izo n 22-3 .
Content s xxi Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 CHAPTER 24 Configur ing IP Multic ast Routing 24-1 Cisco I mplementat ion of IP Multic ast Routing 24-2 Underst .
Cont ents xxii Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Changin g the IGMP Query Ti meout for IGMPv2 24-32 Changin g the Maximum Query Resp onse Time for IGMP v2 24-3.
Content s xxiii Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Config uring a Default MSDP Peer 25-4 Cachin g Source-Active State 25-6 Request ing Source Info rmation from a.
Cont ents xxiv Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Recover i ng from a Comma nd Switch Failure 27-7 Replac ing a Failed Command Switch with a Clus ter Member 27-.
Content s xxv Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Creati ng a Conf igurat ion Fi le By Usi ng a T ext Editor B-10 Copyin g Configuratio n Files By Using TF TP B-1.
Cont ents xxvi Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 FallB ack Bridging C-2 Unsuppor ted Privile ged EXEC Command s C-2 Unsuppor ted Global Conf igurati on Comman .
xxvii Catalyst 3550 Multilaye r Switch Software Configu ration Guide 78-11194-03 Preface Audience This guid e is for the netw orking pro fessiona l manag ing the Catal yst 3550 swit ch, herea fter refer red to as the sw itch or the m ultila yer swit ch.
xxvii i Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Preface Organizati on Organization This guide is or ganized into the se chapters: Chapter 1, “O verview ,” lists the softwa re feat ures of this releas e and provi des examp les of ho w the swi tch can be depl oyed in a ne twork.
xxix Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Pre face Organization Chapter 14, “Con figu ring U DLD ,” describes how to config ure the UniDirect ional Link Detection (UDLD) f eature.
xxx Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Preface Conv entions Appendix A, “Sup ported M IBs,” lists the supporte d MIBs for th is relea s e and how t o use FT P to acc ess the MIB files.
xxxi Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Pre face Related Publ ications Related Publications These doc uments p rov ide co mple te inf orma tio n abou t the swit ch and are available fro m this Cisco . com site: http://www .
xxxii Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Preface Obtain in g Technical Assis ta nce Ordering Docume ntation Cisco do cumentati on is availab le in the follow in.
xxxii i Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Pre face Ob taining Technical Assistance Cisco.com Cisco.com is the foundatio n of a suite of interac tive, networ ked.
xxxiv Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Preface Obtain in g Technical Assis ta nce If you can not re solv e yo ur te ch nica l iss ues by using the Cisco T AC W eb Site, and you are a Cisc o.
C HAPTER 1-1 Catalyst 3550 Multilaye r Switch Software Configu ration Guide 78-11194-03 1 Overview This chapte r provides these topics about th e Catalyst 3550 multilayer switch software: • Feat ure.
1-2 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Ch ap ter 1 Overv iew Feature s Perf orma nce • Auto sensing of po rt speed an d autone gotiation of duplex mod e on all switch por ts for opti mizing ba ndwidth • IEEE 802.
1-3 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 1 Overview Features Red undan cy • Hot Standby Rout er Proto col (HSRP) for co mman d switch and Layer 3 ro uter.
1-4 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Ch ap ter 1 Overv iew Feature s • T erminal Access Cont roller Acc ess Control System Plu s (T A CAC S+), a propri etar.
1-5 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 1 Overview Manageme nt Options Management Options The Cat al yst 3 550 swi tch is de signe d for pl ug-a nd- pla y ope ratio n: you n ee d to conf igure o nly b asic IP inform ation fo r the switc h and con nect it to th e other devi ces in your network .
1-6 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Ch ap ter 1 Overv iew Managem e nt Optio ns • SNMP—SNMP provi des a means to monitor and control the switc h and switch cluster members.
1-7 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 1 Overview Network Configuration Examples Network Config uration E xamples This se cti on pr ovi des net work c onfig urat ion co ncep t s and inc lud es e xamp les of usi ng t he s wit ch i n different network to pologies.
1-8 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Ch ap ter 1 Overv iew Netwo rk Conf igurati on Ex amples Bandwidt h alone is not the only c onsiderat ion when desig ning you r network.
1-9 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 1 Overview Network Configuration Examples Figure 1-1 shows three config uration example s of using Catalyst switch.
1-10 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Ch ap ter 1 Overv iew Netwo rk Conf igurati on Ex amples Figur e 1 -1 Examp le Configur ations Si Si Si Si Catalyst 3550.
1-11 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 1 Overview Network Configuration Examples Small to Mediu m-Sized Ne two rk Usin g Mixed Sw itches Figure 1-2 sho ws a config uration for a network of up to 500 e mploye es.
1-12 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Ch ap ter 1 Overv iew Netwo rk Conf igurati on Ex amples Figur e 1 -2 Catalys t 3550 S wi tc hes in a Collapsed Bac kbon.
1-13 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 1 Overview Network Configuration Examples Large Network Using Only Catalyst 3550 Switches Switche s in t he w iri.
1-14 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Ch ap ter 1 Overv iew Netwo rk Conf igurati on Ex amples Figur e 1-3 Catalyst 35 50 Switc hes in Wir ing Closets i n a B.
1-15 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 1 Overview Network Configuration Examples unauth orized devi ce s fr om bec omin g th e STP roo t swit ch. All p orts ha ve I GMP snoo pi ng or CGM P enabled for multic ast traffi c management.
1-16 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Ch ap ter 1 Overv iew Netwo rk Conf igurati on Ex amples.
C HAPTER 2-1 Catalyst 3550 Multilaye r Switch Software Configu ration Guide 78-11194-03 2 Using the Command-Line Interface This chap ter des cribes the IOS command- line interface (CL I) that yo u can use to co nfigure y our switch es.
2-2 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapt er 2 Us ing t he C omma nd- Line Inte r fac e IOS Command Modes T able 2-1 Command Mo de Summary Mod e Acce ss Met hod Pro mpt Exit Meth od About This Mode User EXEC Begin a session with your sw itch .
2-3 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 2 Using the Com m a nd-Line In te rface Getting Help Getting Help Y ou can e nt er a question m ar k ( ?) at th e s ys tem p ro mpt to d is play a lis t o f co mm an ds a vailable for e ach comman d mode .
2-4 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapt er 2 Us ing t he C omma nd- Line Inte r fac e Using no and default Forms of Comman ds Using no and defa ult Forms of Comman ds Almost every c onfigur ation comma nd also has a no form .
2-5 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 2 Using the Com m a nd-Line In te rface Using Com mand History Using Command History The IOS pr ovides a hi story or r ecord of co mmands th at you have en tered.
2-6 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapt er 2 Us ing t he C omma nd- Line Inte r fac e Using E diting Feature s T o di s able the fea ture during the cu rrent termi n al session , enter the terminal no history privi lege d EXEC co mmand.
2-7 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 2 Using the Com m a nd-Line In te rface Using Edit ing Featu res Rec all co mman ds from the buffer and paste them in the command line. The swi tch provid es a buf fer with t he last ten i tems that you delete d.
2-8 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapt er 2 Us ing t he C omma nd- Line Inte r fac e Searching and F iltering O utput of show and more Com man ds Editing C ommand Lines that Wrap Y ou can use a wraparoun d feature fo r command s that exte nd beyo nd a single line on the scr een.
2-9 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 2 Using the Com m a nd-Line In te rface Acce ssi ng th e C L I Accessing the CLI Before you can acc ess the CLI , .
2-10 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapt er 2 Us ing t he C omma nd- Line Inte r fac e Access ing the CLI.
C HAPTER 3-1 Catalyst 3550 Multilaye r Switch Software Configu ration Guide 78-11194-03 3 Getting Started with CMS This chap ter pro vides these topics about th e Cluster Man agement Sui te (CMS) soft.
3-2 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 3 Getting Started with CMS Feature s Features CMS pr ovides these featur es ( Figure 3-1 ) for man agin g s witch.
3-3 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 3 Getting S tar ted with CMS Features • T wo level s of access to the configuratio n options: read-write access .
3-4 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 3 Getting Started with CMS Front Panel Vi ew Front Panel View When CMS is launc hed from a co mman d switch, the Fro nt Panel vie w displays th e front-p anel im ages of all swit ches in the clus ter ( Figure 3-2 ).
3-5 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 3 Getting S tar ted with CMS Front Pa nel Vie w Cluste r Tr ee The clu ste r tre e ( Figure 3-3 ) appears in the left frame of the Fro nt Panel view and shows the name of t he cluste r and a list of its memb ers.
3-6 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 3 Getting Started with CMS Front Panel Vi ew Front-Panel Images Y ou ca n m ana ge t he sw it ch f rom a r emot e st at ion b y using the f ront- pane l ima ge s.
3-7 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 3 Getting S tar ted with CMS Front Pa nel Vie w Redundant Power System LE D The Re dun dant Pow er Syste m (RPS) L ED s hows t he RPS sta tus ( Ta b l e 3 - 2 ).
3-8 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 3 Getting Started with CMS Front Panel Vi ew Port Modes and LEDs The por t mode s ( Ta b l e 3 - 3 ) determi ne the ty pe of infor mation displ ayed through the port L EDs.
3-9 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 3 Getting S tar ted with CMS Front Pa nel Vie w VLAN Membership Modes Ports in the Front Panel view are outli n ed.
3-10 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 3 Getting Started with CMS Topology Vie w Topology Vie w The T opol ogy view disp lays h ow the d ev ice s wit hin a swi tch clust er a re conne c ted a nd how t he swit ch cluste r i s c onn ecte d to ot her c luster s a nd devi ce s.
3-11 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 3 Getting S tar ted with CMS Topol ogy View Figur e 3-6 Ex pand Clust er View Figur e 3-7 Col lapse Cluster V iew Right-click a link icon to displa y a link popup menu.
3-12 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 3 Getting Started with CMS Topology Vie w Topology Icons The T opol ogy view and the cluste r tree use the sa me set of d evice i cons to repres ent clus ters, com mand and stand by comm and swit ches, an d member sw itches ( Figure 3-8 ).
3-13 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 3 Getting S tar ted with CMS Topol ogy View Figur e 3-9 T opolog y-V iew Link Icons Device and Link Lab els The T.
3-14 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 3 Getting Started with CMS Topology Vie w Colors in the Topo logy Vie w The colors of the T opology view icons reflec t the status of the devices and links ( Ta b l e 3 - 6 , Ta b l e 3 - 7 , and Ta b l e 3 - 8 ).
3-15 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 3 Getting S tar ted with CMS Menus and To olbar Menus and Tool bar The co nfigura tion an d monito ring option s for conf igurin g switches and switch cl usters are avai lable from the menu bar , toolba r , an d the Fron t-Panel an d T opology vi ew popup me nus.
3-16 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 3 Getting Started with CMS Menu s an d Toolba r • If your clu ster has these me mber switches run ning earlie .
3-17 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 3 Getting S tar ted with CMS Menus and To olbar Clust er Cluster Ma nager 3 Launch a C MS session from the co mmand switch . Create Cluster 1 4 Desig nate a c ommand swi tch, and na me a cluste r .
3-18 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 3 Getting Started with CMS Menu s an d Toolba r Router Redu nda ncy 2 6 (guide mode a vai lab le 1 ) Add a swi tch t o or re mo ve a swit ch f rom an HS RP grou p.
3-19 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 3 Getting S tar ted with CMS Menus and To olbar Reports Invent ory Displa y th e de vice ty pe, soft wa re v er sion, IP addr ess, and ot h er inf orm ati on abou t a switch.
3-20 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 3 Getting Started with CMS Menu s an d Toolba r Help Overview Obtain an overvie w of the CMS interface. What’ s Ne w Obtai n a d es crip tio n o f th e new CMS fe atur es .
3-21 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 3 Getting S tar ted with CMS Menus and To olbar Toolbar The t oolba r button s d is play com mon ly us ed sw it ch a nd clu ster c onfig ur ation op tion s and i nfo rmat ion windows suc h as legend s and online he lp.
3-22 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 3 Getting Started with CMS Menu s an d Toolba r Front Panel V iew Po pup M enus These popu p menus ar e a vaila ble in the Front Pane l v iew .
3-23 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 3 Getting S tar ted with CMS Menus and To olbar Topology View P opup Men us These popu p menus ar e available in the T opology vie w .
3-24 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 3 Getting Started with CMS Menu s an d Toolba r Device Popup Menus Specific devic es in the T opology view di sp.
3-25 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 3 Getting S tar ted with CMS Menus and To olbar T able 3-18 Device P opup M enu of a Cand idat e-Switc h Icon (When the Candidat e Switc h Has an IP A ddre s s) Pop up Menu O ption T ask Add to Cluste r 1 Add a ca nd idat e t o a c l uster .
3-26 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 3 Getting Started with CMS Interac ti on M odes Interaction Modes Y ou can cha nge the interacti on mode o f CMS to eithe r guide or ex pert mod e. Guide mod e steps you thr ough ea ch feat ure opti on and pro vide s infor matio n about the para meter .
3-27 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 3 Getting S tar ted with CMS Tool Tips Tool Tips CMS disp lays a po pup m essage wh en you mov e you r mou se ov .
3-28 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 3 Getting Started with CMS CMS W indow Com ponents CMS Window Components CMS windo ws consi ste ntly p re sen t c onfig urat ion info rmat ion. Figu re 3-12 shows th e compone nts of a typical CMS windo w .
3-29 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 3 Getting S tar ted with CMS CMS Wi nd ow Co mpo n ents Tabs, Lists, and T ables Some CMS w indo ws ha ve ta bs that present d iffe r ent sets of in format ion. T a bs are arranged like folder headings a cross the t op of the window .
3-30 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 3 Getting Started with CMS Access ing CMS Accessing CMS This section assumes the followi ng: • Y ou kn ow the IP address a nd passw ord of the comma nd switch or a spec ific switc h.
3-31 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 3 Getting S tar ted with CMS Acce s sing CMS Access Mo des in CMS CMS provid es two levels of acc ess to the co nfigura tion opti ons: read -write access and read -only acce ss.
3-32 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 3 Getting Started with CMS Verifying Yo ur Cha nges Verifying Your Changes CMS provi des notificat ion cues t o help you track and conf irm the chan ges you ma ke.
3-33 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 3 Getting S tar ted with CMS Usin g Di ff e ren t Ve rsio ns of CM S Using Different Versions of CMS When ma nagi.
3-34 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 3 Getting Started with CMS Where to Go Nex t.
C HAPTER 4-1 Catalyst 3550 Multilaye r Switch Software Configu ration Guide 78-11194-03 4 Assigning the Switch IP Address and Default Gateway This chap ter describ es how to crea te the initial switch.
4-2 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 4 Assigning the Switch IP Address and Default Gateway Assign ing Swi tch Info rmation The boot loader provides access to the Flash fi le system before the o perating system is lo aded.
4-3 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 4 Assi gni ng the Swi tc h IP Addr ess an d De fault Ga tewa y Assigning Switch Information Default Switch Information Ta b l e 4 - 1 show s the default swi tch i n form ation.
4-4 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 4 Assigning the Switch IP Address and Default Gateway Assign ing Swi tch Info rmation DHCP Client Request Proce s.
4-5 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 4 Assi gni ng the Swi tc h IP Addr ess an d De fault Ga tewa y Assigning Switch Information Configuring the DHCP Ser ver Y ou sho ul d conf ig ur e the DHCP serve r w ith r es er ved lea s es that are bound to e ach switch by th e sw i tch hardware add re ss.
4-6 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 4 Assigning the Switch IP Address and Default Gateway Assign ing Swi tch Info rmation For the switch t o successful ly down load a config uration fi le, the TFT P serve r must conta in one or mor e configuratio n files in its base d irectory .
4-7 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 4 Assi gni ng the Swi tc h IP Addr ess an d De fault Ga tewa y Assigning Switch Information Figur e 4-2 Rela y Dev.
4-8 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 4 Assigning the Switch IP Address and Default Gateway Assign ing Swi tch Info rmation Note Th e switch bro adcast.
4-9 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 4 Assi gni ng the Swi tc h IP Addr ess an d De fault Ga tewa y Assigning Switch Information DNS Server Configuration The DN S server maps th e TFTP s erver name maritsu to I P a dd re ss 1 0.
4-10 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 4 Assigning the Switch IP Address and Default Gateway Checking and Saving th e Run ning Confi gura tion Manually.
4-11 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 4 Assi gni ng the Swi tc h IP Addr ess an d De fault Ga tewa y Checki n g an d Sav in g the Ru nnin g Co nf igur atio n ! interface GigabitEthernet0/1 no switchport ip address 172.
4-12 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 4 Assigning the Switch IP Address and Default Gateway Modifyin g th e Startup Config uration Modifying the Start up Configu ration This section descr ibes how to modify the switch star tup configuratio n.
4-13 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 4 Assi gni ng the Swi tc h IP Addr ess an d De fault Ga tewa y Modifying the Startup Configuration Specifying the Filename to Read and Write the System Configuration By default, the IOS softwa r e uses the file config .
4-14 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 4 Assigning the Switch IP Address and Default Gateway Modifyin g th e Startup Config uration T o disable m anua l bo oti ng, us e t he no boot manual globa l config uration c omman d.
4-15 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 4 Assi gni ng the Swi tc h IP Addr ess an d De fault Ga tewa y Modifying the Startup Configuration Controlling En.
4-16 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 4 Assigning the Switch IP Address and Default Gateway Modifyin g th e Startup Config uration Ta b l e 4 - 5 desc ribes the fun ction of the most comm on environ ment var iables.
4-17 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 4 Assi gni ng the Swi tc h IP Addr ess an d De fault Ga tewa y Schedul ing a Rel oad of the Sof tware Image Sched.
4-18 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 4 Assigning the Switch IP Address and Default Gateway Scheduli ng a Re load of the S oft w are Image This exampl.
C HAPTER 5-1 Catalyst 3550 Multilaye r Switch Software Configu ration Guide 78-11194-03 5 Clustering Switches This chapte r provides these topics to help you get started with switch clust ering: • U.
5-2 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 5 Clustering Switches Unders tan din g Sw itch Cluste rs Understandin g Switch Clust ers A switch cluster i s a group of connected C atalyst swit ches that a re manage d as a sing le entity .
5-3 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 5 Clustering Switche s Underst anding Swi tch Clust ers Standby C ommand Switch Characteristic s A Catalyst 3550 standby c omman d switch must me et these re quirem ents: • It is running 12.
5-4 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 5 Clustering Switches Planning a Sw it ch Cl ust er Planning a Switch Cl uster Anticipatin g conflicts and compatibilit y issues is a high priority when you manage several switch es through a c lust er .
5-5 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 5 Clustering Switche s Planni ng a Swit ch Clust er Discovery through CDP Hops By using CDP , a c omm and sw itch can di scove r sw itche s u p to se ven CDP hops aw ay ( the defa ult is three hops) from the ed ge of the clus ter .
5-6 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 5 Clustering Switches Planning a Sw it ch Cl ust er Discovery through Non-CDP-Capabl e and Noncluster-Capable Dev.
5-7 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 5 Clustering Switche s Planni ng a Swit ch Clust er Discovery through Different V LANs A cluste r can have Catalyst 3550 member switches co nfigur ed with dif ferent VLANs.
5-8 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 5 Clustering Switches Planning a Sw it ch Cl ust er Discovery through the Same Management VLAN When the cluster h.
5-9 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 5 Clustering Switche s Planni ng a Swit ch Clust er Discovery through Different M anagement VLANs W e stron gly re.
5-10 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 5 Clustering Switches Planning a Sw it ch Cl ust er Discovery through Routed Ports If the comm and switch has a rout ed port (RP) conf igured , it disco vers only candida te and member switch es in the same VLAN as the rout ed port.
5-11 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 5 Clustering Switche s Planni ng a Swit ch Clust er Discovery of Newly Installed Switches A new , ou t-of-the -box switch is set wi th th e defa ult VLAN , VLA N 1.
5-12 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 5 Clustering Switches Planning a Sw it ch Cl ust er HSRP and S tandby Command Sw itches The swi tch su pports Ho t Standby Router Protoco l (HSRP) so that you can co nfigure a group of st andby comman d s wit che s.
5-13 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 5 Clustering Switche s Planni ng a Swit ch Clust er Virtual IP Addresses Y ou need t o assi gn a uniq ue virt ual I P add ress an d gro up n umber and name to the c luster st andby group .
5-14 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 5 Clustering Switches Planning a Sw it ch Cl ust er Considerations for Cluster Stan dby Groups In addi tion to p.
5-15 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 5 Clustering Switche s Planni ng a Swit ch Clust er Figur e 5-8 VLAN Connectivi t y betw een Standb y-Gr oup Members and Clu s ter Members IP Addresse s Y ou must assi gn IP info rmation to a comma nd switch.
5-16 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 5 Clustering Switches Planning a Sw it ch Cl ust er Host Names Y ou do not need to assign a host name to either a command switch or an eligi ble cluster membe r .
5-17 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 5 Clustering Switche s Planni ng a Swit ch Clust er TACACS+ If T erminal Access Con troll e r Acce ss Co ntro l S.
5-18 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 5 Clustering Switches Creating a Switch Cluster Availability of Switch-Specifi c Features in Switch Clusters The men u bar on the com mand swi tch displ ays all op tion s av aila ble from the swit ch clu ster .
5-19 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 5 Clustering Switche s Creati ng a Swit ch Cluster Enabling a Command S witch The sw itc h you de sign ate to be .
5-20 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 5 Clustering Switches Creating a Switch Cluster Adding Me mber Sw itches As expl ained i n the “A utomat ic Discovery of Cluster Candida tes and Memb ers” secti on on page 5- 4 , the comman d s wit ch a utom a tica lly disc overs c an dida te switc hes .
5-21 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 5 Clustering Switche s Creati ng a Swit ch Cluster Figur e 5-1 0 Add t o Cluster Windo w Figur e 5-1 1 Using the T opolog y Vi ew t o A dd Member S witches Enter the pass word of the candidate s witch.
5-22 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 5 Clustering Switches Creating a Switch Cluster Creating a Clu ster S tandby Group The cl u ster sta ndby grou p.
5-23 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 5 Clustering Switche s Creati ng a Swit ch Cluster Figu re 5 - 12 Stand by Com ma nd Co nfi g urat i on W in dow 2950C (cisco WS-C2950-C-24, HC, ... NMS-3550-12T -149 (cisco WS-C3550-1 3550-150 (cisco WS-C3550-12T , SC, .
5-24 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 5 Clustering Switches Creating a Switch Cluster Verifying a Switch Cluster When you fin ish adding cl uster me m.
5-25 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 5 Clustering Switche s Using the CLI to Manage Switch Clusters Using the CLI to Manage Swit ch Clusters Y ou can configur e member switches from th e CLI by first logging into the comman d switch.
5-26 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 5 Clustering Switches Using SNMP to Ma nage Sw itch Cl usters Using SNMP to Manage Switc h Clusters When you f i.
C HAPTER 6-1 Catalyst 3550 Multilaye r Switch Software Configu ration Guide 78-11194-03 6 Administering the Switch This cha pter descri bes how to per form one-t ime opera tions to adm inister your switch.
6-2 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 6 Administering the Switch Protecting A ccess to Privileged EXE C Comman ds T o prevent una uthorize d access int.
6-3 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 6 Adminis ter ing the Switc h Prote c ting Acce ss t o Priv i lege d EX EC Co mman ds Default Password and Privilege Level Configuration Ta b l e 6 - 1 sho ws the d ef ault passw ord a nd priv ilege leve l c onfi gurat ion .
6-4 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 6 Administering the Switch Protecting A ccess to Privileged EXE C Comman ds This exam ple shows ho w to change th e enable pass word to l1u2c3 k4y5 .
6-5 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 6 Adminis ter ing the Switc h Prote c ting Acce ss t o Priv i lege d EX EC Co mman ds If bo th the enable and ena b le se cret pass word s are defined, users must enter the enab le sec ret pas sword.
6-6 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 6 Administering the Switch Protecting A ccess to Privileged EXE C Comman ds Beginnin g in pr ivilege d EXE C m od.
6-7 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 6 Adminis ter ing the Switc h Prote c ting Acce ss t o Priv i lege d EX EC Co mman ds T o remove the passw ord, use the no pa ssword glob al confi gura tion co mmand .
6-8 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 6 Administering the Switch Protecting A ccess to Privileged EXE C Comman ds T o di sable usernam e au then tica tion for a specifi c user , use th e no username name global confi guration comman d.
6-9 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 6 Adminis ter ing the Switc h Prote c ting Acce ss t o Priv i lege d EX EC Co mman ds When yo u set a command to a privilege level, all co mmands wh ose syntax is a subset of that command are also set to that leve l.
6-10 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 6 Administering the Switch Controlling Sw itch Acce ss w ith TACACS+ Logging into and Exiting a Privilege Level .
6-11 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 6 Adminis ter ing the Switc h Controlling Switch Access with TACACS+ The goal of T ACACS+ is to provide a me thod for managing mu ltiple network acc ess points from a single manageme nt ser vice.
6-12 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 6 Administering the Switch Controlling Sw itch Acce ss w ith TACACS+ Y ou ne ed a syst em runn ing th e T ACACS+ daem on sof tware to use T ACACS+ on yo ur switc h.
6-13 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 6 Adminis ter ing the Switc h Controlling Switch Access with TACACS+ Configuring TACACS+ This secti on describe s how to confi gure your swit ch to support T A CACS+.
6-14 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 6 Administering the Switch Controlling Sw itch Acce ss w ith TACACS+ Beginning in privil eged EXEC mode, follow .
6-15 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 6 Adminis ter ing the Switc h Controlling Switch Access with TACACS+ A method list describe s the sequence and authentic ation methods to be queried to authenticate a user .
6-16 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 6 Administering the Switch Controlling Sw itch Acce ss w ith TACACS+ T o di sable AAA, use th e no aaa new-model global conf iguration co mmand. T o disable AAA authenti cation, use th e no aaa aut hent ica tion l ogin { default | list-name } method1 [ method2 .
6-17 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 6 Adminis ter ing the Switc h Controlling Switch Access with RADIUS Starting TACACS+ Accounting The AA A accounting featu re trac ks the ser v ices that us ers a re acce ssing and the am ount o f networ k resources th at they ar e consuming .
6-18 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 6 Administering the Switch Controllin g Switch A cce ss wit h RA DIUS Understanding RADIUS RADIUS is a dis tribut ed clien t/server system that se cures networ ks again st unau thorized acces s.
6-19 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 6 Adminis ter ing the Switc h Controlling Switch Access with RADIUS Figur e 6-2 T ypical AAA Netw ork Con figurat.
6-20 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 6 Administering the Switch Controllin g Switch A cce ss wit h RA DIUS soft ware uses the first me thod list ed to authen ticate, to au thoriz e, or to keep acc ounts on user s; if that method does not respond, the softwar e selects the next method in the list.
6-21 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 6 Adminis ter ing the Switc h Controlling Switch Access with RADIUS If two d iff erent host entries on the sam e .
6-22 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 6 Administering the Switch Controllin g Switch A cce ss wit h RA DIUS T o remove the speci fied RADI US server , use the no radius-server host hostname | ip-address global config urati on comm and.
6-23 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 6 Adminis ter ing the Switc h Controlling Switch Access with RADIUS This exa mp le shows how t o configu re host1.
6-24 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 6 Administering the Switch Controllin g Switch A cce ss wit h RA DIUS T o di sable AAA, use th e no aaa new-model global conf iguration co mmand.
6-25 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 6 Adminis ter ing the Switc h Controlling Switch Access with RADIUS Server g roups al so can inclu de multiple ho.
6-26 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 6 Administering the Switch Controllin g Switch A cce ss wit h RA DIUS T o remove the speci fied RADI US server , use the no radius-server host hostname | ip-address global config urati on comm and.
6-27 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 6 Adminis ter ing the Switc h Controlling Switch Access with RADIUS Beginning in p rivileged EXEC mod e, follow t.
6-28 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 6 Administering the Switch Controllin g Switch A cce ss wit h RA DIUS Configuring Settings for All RADIUS S erve.
6-29 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 6 Adminis ter ing the Switc h Controlling Switch Access with RADIUS For exam pl e, the follow ing A V p air ac ti.
6-30 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 6 Administering the Switch Controllin g Switch A cce ss wit h RA DIUS Beginning in privile ged EXEC mode, follow.
6-31 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 6 Adminis ter ing the Switc h Configuring the Switch for Local Authentication and Authorization Configuring the S.
6-32 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 6 Administering the Switch Managin g the Syste m Time and Date Managing the System Time and Date Y ou can manage the system tim e and date on your switch usin g automatic, such as the Netwo rk T im e Protoco l (NTP), or man ual config uration me thods.
6-33 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 6 Adminis ter ing the Switc h Mana gi ng th e S y stem Tim e an d Da t e running NTP autom atically chooses as its time source the device with the lowest stratum number with which it communic ates through NTP .
6-34 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 6 Administering the Switch Managin g the Syste m Time and Date Figur e 6-3 T ypical NTP Netw ork Configuration C.
6-35 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 6 Adminis ter ing the Switc h Mana gi ng th e S y stem Tim e an d Da t e Default NTP Configurati on Ta b l e 6 - 2 show s th e defa ult NTP co nfig urati o n. NTP is enable d on all interface s by default.
6-36 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 6 Administering the Switch Managin g the Syste m Time and Date T o di sable NT P au th entica tio n, use the no ntp authentic ate global con figura tion comm and.
6-37 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 6 Adminis ter ing the Switc h Mana gi ng th e S y stem Tim e an d Da t e Y ou need to configur e only one end of an associat ion; the other devic e can automatical ly establish th e associat ion.
6-38 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 6 Administering the Switch Managin g the Syste m Time and Date T o disab le the interface from se nding NTP broadcast packets, use the no nt p br oad cast interface configurat ion comman d.
6-39 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 6 Adminis ter ing the Switc h Mana gi ng th e S y stem Tim e an d Da t e Creating an Access Group and A ssigni ng.
6-40 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 6 Administering the Switch Managin g the Syste m Time and Date If the source I P address matches the a ccess lists for more than one acce ss type, the firs t type is granted.
6-41 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 6 Adminis ter ing the Switc h Mana gi ng th e S y stem Tim e an d Da t e The specified interface i s used for the s ource add ress for all packets sent to all dest inations.
6-42 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 6 Administering the Switch Managin g the Syste m Time and Date Setting the System Clock If you have an outside source on the netw ork that pro vides time services, such as an NTP se rver , you do not need to manuall y set the syste m clock.
6-43 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 6 Adminis ter ing the Switc h Mana gi ng th e S y stem Tim e an d Da t e Configuring the Tim e Zone Beginn ing in.
6-44 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 6 Administering the Switch Managin g the Syste m Time and Date Configuring Summer Time (Daylight Saving Ti me) B.
6-45 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 6 Adminis ter ing the Switc h Mana gi ng th e S y stem Tim e an d Da t e Beginning in priv ileged EXEC mode, foll.
6-46 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 6 Administering the Switch Configur ing a Sys tem Nam e and Prompt Configuring a System Name a nd Prompt Y ou configure the system name on the switch to identify it.
6-47 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 6 Adminis ter ing the Switc h Confi guring a S ystem Name an d Prompt Configuring a System P rompt Begin ning in .
6-48 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 6 Administering the Switch Configur ing a Sys tem Nam e and Prompt Default DNS Configur ation Ta b l e 6 - 3 shows the defa ult DNS c onfiguration.
6-49 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 6 Adminis ter ing the Switc h Creat ing a Bann er domain n ame is the v alue set b y the ip domain-na me globa l c on figur at ion c om mand. I f ther e is a period (.
6-50 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 6 Administering the Switch Creating a Banner Configurin g a Mess age-of-the -Day Log in Bann er Y ou can c reate a single or multiline me ssage b ann er th at ap p ears o n the sc re en when so meone lo gs in to the switch.
6-51 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 6 Adminis ter ing the Switc h Managin g the MAC Addre ss Table Configurin g a Login B anner Y ou can config ure a login ba nner to be disp layed on al l conne cted termi nals.
6-52 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 6 Administering the Switch Managin g the MAC A ddre ss Table This section con tains this configuratio n informat.
6-53 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 6 Adminis ter ing the Switc h Managin g the MAC Addre ss Table Default MAC Address Table Configuration Ta b l e 6 - 4 show s the defaul t MAC addre ss tabl e conf igurati o n.
6-54 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 6 Administering the Switch Managin g the MAC A ddre ss Table Removi ng Dyn amic Ad dre ss E ntries T o remove al l d ynami c e ntr ies, use th e clear mac-address-table dynamic command in pr ivi leged EXEC m ode.
6-55 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 6 Adminis ter ing the Switc h Managin g the MAC Addre ss Table T o disable th e switc h fro m sen ding M AC a ddr ess no tif ica tion t raps, use t h e no snmp-server ena ble traps mac -not ifica tion global configurat ion command.
6-56 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 6 Administering the Switch Managin g the MAC A ddre ss Table Adding and Remo ving Sta tic Address E ntries A static address has these characteristics: • It is manu ally ente red in the a ddress tab le and must be manual ly remo ved.
6-57 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 6 Adminis ter ing the Switc h Optimizi ng System Re sources for User-Se lected Feat ures Displaying A ddress Tabl.
6-58 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 6 Administering the Switch Optimizin g Sys tem Resourc es for Us er-Se lected Fe atures The numbe r of subne t VLANs (ro uted ports and SVIs) are not limited by sof tware and can be set to a number h igher t han ind icat ed in the tables.
6-59 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 6 Adminis ter ing the Switc h Optimizi ng System Re sources for User-Se lected Feat ures Using the Te mplate s Fo.
6-60 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 6 Administering the Switch Optimizin g Sys tem Resourc es for Us er-Se lected Fe atures This exa mple shows how .
C HAPTER 7-1 Catalyst 3550 Multilaye r Switch Software Configu ration Guide 78-11194-03 7 Configuring 802.1X Port-Ba sed Authen tication This cha pter d escribe s how to confi gure IEEE 802 .1X p ort-b ased a uthent icati on to prevent unau thorize d devices ( clients) from ga ining access to the network .
7-2 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 7 Configur ing 802. 1X Port-Bas ed Authenticati on Unders tan ding 802.1X Port -Based A ut henticat io n Device Roles W ith 802.1X port-based authentication , the devices in the network have spec ific roles as shown in Figure 7-1 .
7-3 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 7 Configuri ng 8 02.1X Port-B as ed A uthenti cat io n Understandi ng 802.1X Port-Base d Authent ication Authentication Initiation and Message Exchange The swi tch or th e client can initi ate authen tication.
7-4 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 7 Configur ing 802. 1X Port-Bas ed Authenticati on Unders tan ding 802.1X Port -Based A ut henticat io n Ports in Au thorized and Un authorized S tates The switc h port state de termin es whethe r or not the clie nt is gran ted acces s to the network .
7-5 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 7 Configuri ng 8 02.1X Port-B as ed A uthenti cat io n Configuring 802. 1X Authent ication In a po in t-to- point confi g urat ion (see Figure 7-1 on page 7-2 ), only one cli ent can be connect ed to the 802.
7-6 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 7 Configur ing 802. 1X Port-Bas ed Authenticati on Configur ing 80 2. 1X Au thent ica tion Default 802.1X Configuration Ta b l e 7 - 1 shows the defau lt 802.1X co nfigura tion.
7-7 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 7 Configuri ng 8 02.1X Port-B as ed A uthenti cat io n Configuring 802. 1X Authent ication 802.1X Configuration Guidelines These ar e the 80 2.1X aut henti cation co nfig uration gui deli nes: • When 802.
7-8 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 7 Configur ing 802. 1X Port-Bas ed Authenticati on Configur ing 80 2. 1X Au thent ica tion Enabling 802.1X Authentication T o enable 802.1X por t-based au thenticatio n, you m ust enable A AA and specify th e authen tication method list.
7-9 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 7 Configuri ng 8 02.1X Port-B as ed A uthenti cat io n Configuring 802.
7-10 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 7 Configur ing 802. 1X Port-Bas ed Authenticati on Configur ing 80 2. 1X Au thent ica tion This exa mple shows how to specify the se rver with IP address 172.2 0.39.
7-11 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 7 Configuri ng 8 02.1X Port-B as ed A uthenti cat io n Configuring 802.
7-12 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 7 Configur ing 802. 1X Port-Bas ed Authenticati on Configur ing 80 2. 1X Au thent ica tion Changing the Sw itch-to-Clie nt Retran smission Time The client respon ds to the EAP-request/id entity frame fro m the switch with an EAP-response/i d entity frame.
7-13 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 7 Configuri ng 8 02.1X Port-B as ed A uthenti cat io n Configuring 802.
7-14 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 7 Configur ing 802. 1X Port-Bas ed Authenticati on Display ing 802.1 X Stat is t ics and Status T o disable multiple hosts on the port, use the no dot1x multiple-hosts interface c onfiguration c ommand.
C HAPTER 8-1 Catalyst 3550 Multilaye r Switch Software Configu ration Guide 78-11194-03 8 Configuring Interface Cha racteristics This chapte r defines the types of interface s on the switch and describes how to configure them.
8-2 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 8 Configuring Interface Characteristics Unders tan ding Inte rfa ce Type s Port-Based VLANs A VLAN is a switched network that is logically segmen ted by function, team, or application, without regard to the physica l locat ion of the users.
8-3 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 8 Configuri ng In te rface Charac teristics Unde rsta ndi n g In t erf ac e Ty p es Trunk Ports A trunk port carri es the traf fic of multiple VLANs and by default is a member of all VLANs in the VLAN database .
8-4 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 8 Configuring Interface Characteristics Unders tan ding Inte rfa ce Type s Switch Virtual Interfaces A switch virtual i n terface ( SVI) r epresents a VLAN of sw itch port s as one in terface to the r outing or bridging fu nctio n in the system .
8-5 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 8 Configuri ng In te rface Charac teristics Unde rsta ndi n g In t erf ac e Ty p es For more informat ion about IP.
8-6 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 8 Configuring Interface Characteristics Using the Inter fa ce Command Figur e 8-2 Connecting VLANs with the Catal.
8-7 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 8 Configuri ng In te rface Charac teristics Using the Interface Command T o conf igure a physical interface (por t ), enter int e rf a ce configuration mode, an d specify the interface type , slot, an d number .
8-8 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 8 Configuring Interface Characteristics Using the Inter fa ce Command Ente r t he sh ow in terf ac es privileged EXEC co mman d to see a list of all inter fa ces on or co nfigur ed fo r the switc h.
8-9 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 8 Configuri ng In te rface Charac teristics Using the Interface Command 5 minute output rate 0 bits/sec, 0 packets.
8-10 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 8 Configuring Interface Characteristics Using the Inter fa ce Command • Y ou m ust add a sp ac e bet wee n t he inte rf ace nu mbers a nd the hy phen wh en u s ing the interf ace ra nge c omm an d.
8-11 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 8 Configuri ng In te rface Charac teristics Using the Interface Command Configur ing and Us ing Interf ac e Ra nge M acro s Y ou can create a n interfac e range macro to automat ically sele ct a range of interfaces fo r config uration.
8-12 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 8 Configuring Interface Characteristics Configur ing Layer 2 In ter faces Thi s exampl e shows how to de fine an.
8-13 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 8 Configuri ng In te rface Charac teristics Configuring Layer 2 Interfaces Default Layer 2 Ethernet Interface Configuration Ta b l e 8 - 1 shows the Layer 2 Ethernet inter face default conf iguration.
8-14 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 8 Configuring Interface Characteristics Configur ing Layer 2 In ter faces Configuring In terface Sp eed and Du p.
8-15 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 8 Configuri ng In te rface Charac teristics Configuring Layer 2 Interfaces Be g i n n i n g i n p r i v i l e g e.
8-16 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 8 Configuring Interface Characteristics Configur ing Layer 2 In ter faces Configuring IEEE 802.
8-17 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 8 Configuri ng In te rface Charac teristics Configuring Layer 2 Interfaces Be g i n n i n g i n p r i v i l e g e.
8-18 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 8 Configuring Interface Characteristics Mon i tor in g an d Mai nta in in g th e La yer 2 Inte rfa ce Use the no description interf ace configur ation comman d to delete the descri ption.
8-19 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 8 Configuri ng In te rface Charac teristics Monitoring and Maintaining the Layer 2 Interface This e xampl e sh ow.
8-20 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 8 Configuring Interface Characteristics Mon i tor in g an d Mai nta in in g th e La yer 2 Inte rfa ce This e xam.
8-21 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 8 Configuri ng In te rface Charac teristics Monitoring and Maintaining the Layer 2 Interface Note Th e clear coun.
8-22 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 8 Configuring Interface Characteristics Configur ing Layer 3 In ter faces T o ve rify that an interf ace is disable d, enter th e show inte rfaces privileged EXE C comma nd.
8-23 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 8 Configuri ng In te rface Charac teristics Configuring Layer 3 Interfaces Beginnin g in pr ivi leged EX EC mod e.
8-24 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 8 Configuring Interface Characteristics Configur ing Layer 3 In ter faces This is an example of ou tput from the.
C HAPTER 9-1 Catalyst 3550 Multilaye r Switch Software Configu ration Guide 78-11194-03 9 Creating and Maintaining VLANs This chapte r de scr ibes how to creat e an d ma int ain V LANs. I t in clude s inf ormatio n a bout VL AN mo des, the VLAN Trunking Protoc ol (VTP) dat aba se, a nd the VL AN Mem ber ship Policy Serv er ( VMPS).
9-2 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 9 Creating and Maintaining VLANs Unders tan ding VLAN s Figur e 9-1 VLANs as Lo gically Define d Networ ks VLANs ar e often assoc iated wit h IP subnetw orks. For exa mple, all th e end stati ons in a part icular IP subnet belong to the sa me VLAN.
9-3 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 9 Creating and Maintai nin g VLA Ns Using the V LAN Trunki ng Proto col VLAN Port M embership M odes Y ou co nfigu.
9-4 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 9 Creating and Maintaining VLANs Using the VLA N Trunking Pro tocol The VTP Do main and VTP Mode s A VTP do ma in.
9-5 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 9 Creating and Maintai nin g VLA Ns Using the V LAN Trunki ng Proto col VTP Advertisements Each swi tch in t he VTP dom ain sends per iodic glob al con figura tion adve rtise ments from each trunk po rt to a reserved multic ast address.
9-6 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 9 Creating and Maintaining VLANs Using the VLA N Trunking Pro tocol VTP Vers ion 2 If you use VTP in y our n etwor k, you must d ecide whe the r to u se versi on 1 or v ers ion 2.
9-7 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 9 Creating and Maintai nin g VLA Ns Using the V LAN Trunki ng Proto col Figur e 9-2 Flooding T r affic w ithout VTP Pr uning Figure 9-3 sho ws a sw itched network with V TP pruni ng en abled.
9-8 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 9 Creating and Maintaining VLANs Using the VLA N Trunking Pro tocol T o configure V TP pruning on an interfa ce, .
9-9 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 9 Creating and Maintai nin g VLA Ns Using the V LAN Trunki ng Proto col Passwords Y ou can configure a passwor d for the VTP domain, but it is not required.
9-10 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 9 Creating and Maintaining VLANs Using the VLA N Trunking Pro tocol Configuring a VTP Server When a switc h is in VT P server mo de, you can cha nge the V L AN conf igurat i on and hav e it prop ag ated through out the ne twork.
9-11 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 9 Creating and Maintai nin g VLA Ns Using the V LAN Trunki ng Proto col Configuring a VT P Client When a swi tch is i n V TP cl ie nt m ode, yo u ca nno t c hange its VL AN conf igur ation.
9-12 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 9 Creating and Maintaining VLANs Using the VLA N Trunking Pro tocol T o return the switch to VTP ser ver mode, use the no vtp transparent VLAN configur ation command.
9-13 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 9 Creating and Maintai nin g VLA Ns Using the V LAN Trunki ng Proto col Enabling VTP Pruning Pruning inc reases avail able bandwi dth by restri cting flood ed traffic to those tr unk links that the traffic must use to access the de stination devi ces.
9-14 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 9 Creating and Maintaining VLANs Using the VLA N Trunking Pro tocol This is an example of ou tput from the show .
9-15 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 9 Creating and Maintai nin g VLA Ns VLANs i n the VT P Dat a base VLANs in the VTP Database Y ou can set the se p.
9-16 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 9 Creating and Maintaining VLANs VLANs in the VTP Databa se VLAN Configuration Guidelines Follow the se g uide l.
9-17 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 9 Creating and Maintai nin g VLA Ns VLANs i n the VT P Dat a base Configuring VLANs in the VTP Database Y ou ca n a dd, mo dify or rem ove VL AN co nfig ura tions in t he VT P dat aba se by us ing t h e CLI V LA N config urat ion mod e.
9-18 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 9 Creating and Maintaining VLANs VLANs in the VTP Databa se This e xampl e sh ow s how to a dd Et hern et V LAN 20 to the VL AN data base and name it te st 20 : Switch# vlan database Switch(vlan)# vlan 20 name test20 Switch(vlan)# exit APPLY completed.
9-19 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 9 Creating and Maintai nin g VLA Ns VLANs i n the VT P Dat a base Cautio n When y ou de lete a VL AN, any port s assigned to th at VLAN b ecome inact ive. Th ey rem ain associate d with the VLAN (and thus inactive) until you assign them to a new VLAN.
9-20 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 9 Creating and Maintaining VLANs VLANs in the VTP Databa se T o return an interface to its def ault config uration, us e the def ault interfac e interface-id interface config urati on comm and.
9-21 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 9 Creating and Maintai nin g VLA Ns VLANs i n the VT P Dat a base Displaying VLANs in the VTP Database Use the sh.
9-22 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 9 Creating and Maintaining VLANs Unders tan ding VLAN Trunks Understandin g VLAN Trunks These sec tions descr ib.
9-23 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 9 Creating and Maintai nin g VLA Ns Unde rsta ndi n g VL AN Tr unk s Note DTP i s a point-t o-poin t protocol. Howev er , som e interne twork ing devic es might fo rward DT P frames improp erly .
9-24 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 9 Creating and Maintaining VLANs Unders tan ding VLAN Trunks 802.1Q Configuration Considerations 802.1Q t runks impos e these li mitati ons on the trunki ng strate gy for a networ k: • In a netwo rk of Cisco sw itches c onnec ted throu gh 802.
9-25 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 9 Creating and Maintai nin g VLA Ns Unde rsta ndi n g VL AN Tr unk s Configuring a n Ethern et Interface as a Tru.
9-26 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 9 Creating and Maintaining VLANs Unders tan ding VLAN Trunks T o return an interface to its def ault config uration, us e the def ault interface interface-id interface conf iguration command.
9-27 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 9 Creating and Maintai nin g VLA Ns Unde rsta ndi n g VL AN Tr unk s In this example, the enc apsulation metho d .
9-28 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 9 Creating and Maintaining VLANs Unders tan ding VLAN Trunks T o retur n to the default allow ed VLAN list of all VLANs, use the no switchport trunk allowed vlan interfac e config uration comm and.
9-29 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 9 Creating and Maintai nin g VLA Ns Unde rsta ndi n g VL AN Tr unk s T o r eturn to the def ault pruning-elig ible list of al l VLANs, use the no switchport trunk pruning vlan interfac e config uration comm and.
9-30 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 9 Creating and Maintaining VLANs Unders tan ding VLAN Trunks Load Sharing Using STP Port Priorities When two ports on th e same switch form a lo op, the STP port pr iority setting dete r mines which port is enabled an d which port is in a blocking state.
9-31 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 9 Creating and Maintai nin g VLA Ns Unde rsta ndi n g VL AN Tr unk s Step 6 show vlan V erify tha t the VLANs exist in the database on Switch 1. Step 7 configur e terminal En ter glob al confi gurat ion mode.
9-32 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 9 Creating and Maintaining VLANs Unders tan ding VLAN Trunks Load Sha ring Using STP Pa th Cost Y ou can conf ig.
9-33 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 9 Creating and Maintai nin g VLA Ns Unde rs tan ding VM PS Understandin g VMPS The Catalyst 3550 switch act s as a client to the VMPS and communicates with it thr ough the VLAN Query Pro tocol (VQP).
9-34 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 9 Creating and Maintaining VLANs Unders tan din g VMPS If the switc h receiv es an acc ess- denied response f rom the VMPS, it continue s to block traff ic from the MAC a ddress t o or fr om the po rt.
9-35 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 9 Creating and Maintai nin g VLA Ns Unde rs tan ding VM PS This exa m ple sh ows a exam pl e of a VM PS da taba se c onfi gurat ion fil e as i t ap pear s on a Cat alyst 6000 serie s switch.
9-36 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 9 Creating and Maintaining VLANs Unders tan din g VMPS ! vmps-vlan-group Engineering vlan-name hardware vlan-nam.
9-37 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 9 Creating and Maintai nin g VLA Ns Unde rs tan ding VM PS Default VMPS Configuration Ta b l e 9 - 9 shows the default V MPS and dynami c port co nfigura tion on clie nt switches .
9-38 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 9 Creating and Maintaining VLANs Unders tan din g VMPS This i s a n exam pl e o f out put for th e show v mps privil eged EXE C comm and, used to verify th e VMPS server IP address.
9-39 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 9 Creating and Maintai nin g VLA Ns Unde rs tan ding VM PS Reconfirming VLAN Memberships Beginning in privileged .
9-40 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 9 Creating and Maintaining VLANs Unders tan din g VMPS Administering an d Monitoring the VMP S Y ou can display in formation ab out the VMPS by using the show vmps privilege d EXEC command .
9-41 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 9 Creating and Maintai nin g VLA Ns Unde rs tan ding VM PS Figur e 9-7 Dynamic P ort VLAN Member ship Configur ation Primar y VMPS Ser ver 1 Catalyst 6000 series Secondar y VMPS Ser ver 2 Catalyst 6000 series Secondar y VMPS Ser ver 3 172.
9-42 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 9 Creating and Maintaining VLANs Unders tan din g VMPS.
C HAPTER 10-1 Catalyst 3550 Multilaye r Switch Software Configu ration Guide 78-11194-03 10 Configuring STP This c hapt er d escrib es how to c on figur e the Spa nn ing Tree Protocol (ST P) o n y our sw it ch.
10-2 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 10 Configuring STP Unders tan din g B asic STP Featur es For infor mation a bout a dvanced STP feat ures, se e the “ Unders tanding A dvanced ST P Featur es” section on page 1 0-10 and the “Conf iguring Ad vanced STP Featu res” sect ion on page 10-32 .
10-3 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 10 Configuring STP Understa nding Basi c STP Features Multipl e active paths am ong end sta tions cause l oops in th e netwo rk. If a loop exists in the networ k, end stations might receive duplicat e messa ges.
10-4 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 10 Configuring STP Unders tan din g B asic STP Featur es • The rem oval of loo ps in the switche d network b y.
10-5 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 10 Configuring STP Understa nding Basi c STP Features STP Timers T able 10-2 desc ribes the STP t imers that affec t the entir e spanning -tree performa nce.
10-6 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 10 Configuring STP Unders tan din g B asic STP Featur es STP Interfa ce States Propag ation de la ys ca n occur wh en pr otoc ol inf or mat ion p ass es thro ugh a sw it ched L AN.
10-7 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 10 Configuring STP Understa nding Basi c STP Features When th e spa nnin g-t ree a lgorith m p laces a L ayer 2 inte rfac e in the forw ardin g sta te, this proce ss o ccur s: 1.
10-8 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 10 Configuring STP Unders tan din g B asic STP Featur es • Learns addr esses • Receives BPDUs Forwarding State A Laye r 2 inte rface in the forwar ding sta te for ward s fram es.
10-9 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 10 Configuring STP Understa nding Basi c STP Features However , all PVST+ informatio n is main tained by Cisco switches se parated by a cloud of non-C isco 802.1Q s witches .
10-10 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 10 Configuring STP Unders tan din g Advance d STP Feature s Accelerated Aging to Retain Connectivity The default for aging dynamic a ddresses is 5 m inutes, th e default se tting of the mac-addr ess-table aging-time g lo bal conf igur ati on comm an d.
10-11 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 10 Configuring STP Underst anding Advan ced STP Features Figur e 1 0-4 Po rt F ast-Enabled P or ts Understanding.
10-12 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 10 Configuring STP Unders tan din g Advance d STP Feature s Understanding UplinkFast Switches i n hiera rchi cal ne twor ks ca n be g rou ped i nto bac kbo ne swi tch es, d istri bution sw itche s, a nd access switches.
10-13 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 10 Configuring STP Underst anding Advan ced STP Features Figur e 1 0-6 UplinkF ast Exam ple Befor e Dir ect Link.
10-14 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 10 Configuring STP Unders tan din g Advance d STP Feature s How CSUF Work s CSUF ensures that one link in the stack is elected as the path to the root.
10-15 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 10 Configuring STP Underst anding Advan ced STP Features The switch sending the fa st-transition request n eeds .
10-16 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 10 Configuring STP Unders tan din g Advance d STP Feature s Limitations These lim itations ap ply to CSUF: • .
10-17 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 10 Configuring STP Underst anding Advan ced STP Features Figur e 1 0-9 GigaStac k GBIC Connections and S TP Conv.
10-18 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 10 Configuring STP Unders tan din g Advance d STP Feature s Understand ing Back boneF ast Backbon eFa st i s sta rte d whe n a root po rt or blo ck ed por t on a swi tch rece iv es i nf erior BPD Us fr om it s designat ed br idge .
10-19 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 10 Configuring STP Underst anding Advan ced STP Features switch ov er t akes approx im ate ly 30 seconds, twi ce the Forw ar d Dela y time if t he def ault Forward Del ay time of 15 seconds is set.
10-20 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 10 Configuring STP Unders tan din g Advance d STP Feature s Unders tanding Root Gu ar d The La ye r 2 ne two rk of a se rvic e pr ovid er (SP) ca n in cl ud e ma ny conn ec ti ons t o swi tc hes tha t a re n ot owned by the SP .
10-21 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 10 Configuring STP Confi guring Basi c STP Features Configuring Basic STP Features These sect ions incl u de ba .
10-22 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 10 Configuring STP Configur ing Basi c STP F eatures Disabling STP STP is enabled by defa ult on VLAN 1 and o n all newly cr eated VLANs up to the spann ing-tree limit specified in T able 10-3 .
10-23 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 10 Configuring STP Confi guring Basi c STP Features T o c o nfigu r e a swi tch to become the root, use t he spa.
10-24 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 10 Configuring STP Configur ing Basi c STP F eatures Beginn ing in privileged EXEC mode, fo llow these step s t.
10-25 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 10 Configuring STP Confi guring Basi c STP Features Beginn ing in privileged EXEC mode, fo llow these st eps to .
10-26 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 10 Configuring STP Configur ing Basi c STP F eatures Configuring STP Port Priority If a loop occ urs, STP uses the por t priorit y when select ing an interf ace to put into th e forwardin g state.
10-27 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 10 Configuring STP Confi guring Basi c STP Features Configuring STP Path Cost The STP pat h cost default value is derive d from the media speed of an interfa ce. If a loop occ urs, STP uses cos t when sele ctin g an inter fa ce to put in the forwa r ding sta te.
10-28 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 10 Configuring STP Configur ing Basi c STP F eatures Configuring the Switch Priority of a VLAN Y ou can conf igure the switch priority and ma ke it more likely th at the switch will b e chosen as the r oot switch.
10-29 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 10 Configuring STP Confi guring Basi c STP Features Configuring the Hello Time Y ou ca n conf igure the inte rval betwe e n the ge nera ti on of con fig ura tio n messag es by the ro ot switc h by changi ng the ST P h ello tim e.
10-30 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 10 Configuring STP Configur ing Basi c STP F eatures T o return the switch to i ts default setting, u se the no spanning-tree vlan vlan-id forw ard -time globa l config urati on comm and.
10-31 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 10 Configuring STP Confi guring Basi c STP Features Figur e 1 0-14 Gig abi t Ether net Stack Displaying S TP Sta.
10-32 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 10 Configuring STP Configur ing Advan ced STP Fe atures Configuring Advan ced STP Features These se ctions inc .
10-33 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 10 Configuring STP Confi g uri ng Adv anc ed S TP F ea ture s Configuring BPDU Guard When th e BPDU guard featur e is enabled on the switch, STP sh uts do wn Port Fast-e nabled interf aces that rece ive BPDUs rather than putt ing them into the blocking state .
10-34 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 10 Configuring STP Configur ing Advan ced STP Fe atures Configuring UplinkFast for Use with Redundant Links Upl.
10-35 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 10 Configuring STP Confi g uri ng Adv anc ed S TP F ea ture s Configuring C ross-Stac k UplinkF ast Before ena blin g CSU F , make su re your st ack swi tches ar e pr ope rly conn ec ted .
10-36 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 10 Configuring STP Configur ing Advan ced STP Fe atures Configurin g Backbon eFast Y ou can enable Back boneFast to detect indi rect link failures an d to start the spanning-tree reconf igurat ion sooner .
10-37 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 10 Configuring STP Confi g uri ng Adv anc ed S TP F ea ture s Enabling E therChan nel Gua rd Use th e Ethe rChan.
10-38 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 10 Configuring STP Configur ing Advan ced STP Fe atures.
C HAPTER 11-1 Catalyst 3550 Multilaye r Switch Software Configu ration Guide 78-11194-03 11 Configuring IGMP Sno oping an d MVR This chapt er descr ibes how to configur e Interne t Group Ma nageme nt Protocol (IGMP) sno oping on yo ur switch, i ncluding an app lica tion of l ocal IGMP sn oopin g, Mul ticast V LAN Regi strati on (MV R).
11-2 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 11 Configuring IGMP Snooping and MVR Unders tan ding IGM P Snoo ping the switc h adds the host port numb er to the for warding table en try; when i t receives an IGMP Leave Group me ssage from a ho st, it remov es the host port from the tab le entry .
11-3 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 11 Configuring IGMP Sno oping and M VR Understanding IGMP Snooping Figur e 1 1 -1 Initial IGMP J oin Messag e Router A se nds a gener al query t o the switch , which for wards t he query to po rts 2 thro ugh 5, al l members of the same VLAN.
11-4 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 11 Configuring IGMP Snooping and MVR Unders tan ding IGM P Snoo ping Figur e 1 1 -2 Secon d Host Joi ning a Mult.
11-5 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 11 Configuring IGMP Sno oping and M VR Configuring IGMP Snooping Note Y o u sh ould on ly us e t he Im me dia te- Lea ve pr ocessi ng fea tur e on V LAN s w here a si ngle h ost is conn ected to each po rt.
11-6 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 11 Configuring IGMP Snooping and MVR Configuring IG MP Sn ooping Begin ning in privil eged EXEC mode , follow th.
11-7 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 11 Configuring IGMP Sno oping and M VR Configuring IGMP Snooping Beginning in p rivile ge d EXEC m ode, foll o w .
11-8 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 11 Configuring IGMP Snooping and MVR Configuring IG MP Sn ooping T o re move a multicast rou ter port from the VLA N, use the no ip igmp snooping vlan v lan-id mrouter interface inte rfa ce-id global config urat ion comma nd.
11-9 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 11 Configuring IGMP Sno oping and M VR Displaying IGMP Snooping Information Enabling IGM P Immediate -Leave Proce.
11-10 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 11 Configuring IGMP Snooping and MVR Displaying IG MP Sn ooping Informa tion This i s an exam ple of output fro.
11-11 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 11 Configuring IGMP Sno oping and M VR Displaying IGMP Snooping Information This i s an exa mple of output f rom.
11-12 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 11 Configuring IGMP Snooping and MVR Unde rs ta n din g Mu ltic as t V LAN Reg i stra t io n Understandin g Mul.
11-13 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 11 Configuring IGMP Sno oping and M VR Underst anding Multicast VLAN Registration When a subscr iber chan ges chan nels or turns off the tele vision, th e set-top box sends an IGMP lea ve message f or the mu ltic ast stre am.
11-14 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 11 Configuring IGMP Snooping and MVR Conf igurin g MVR MVR elimi nates the need to duplica te televisio n-channel multi cast traf fic for subscr ibers in each VLAN.
11-15 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 11 Configuring IGMP Sno oping and M VR Configuring MVR Default MVR Configuration T able 1 1-5 sh ows the d efaul t M VR c onfi gurat ion .
11-16 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 11 Configuring IGMP Snooping and MVR Conf igurin g MVR T o ret urn th e switch to its defa ult sett ings, use th e no mvr [ mode | group i p-address | querytime | vl an ] global configu ratio n command s.
11-17 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 11 Configuring IGMP Sno oping and M VR Configuring MVR T o retu rn the interface to its default settings, use the no mvr [ type | immediate | vlan vlan -id | group ] interfac e configurati o n commands.
11-18 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 11 Configuring IGMP Snooping and MVR Disp l ay in g MV R Info rma t ion This is an example of ou tput from the show mv r interf ace priv ileged EXEC comma nd when the member keywo rd i s inc lude d: Switch# show mvr interface gigabitethernet0/6 member 239.
11-19 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 11 Configuring IGMP Sno oping and M VR Displaying MVR Information This is an example of ou tput from the show mv.
11-20 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 11 Configuring IGMP Snooping and MVR Conf igurin g IGM P Filt ering Configuring IGMP Fil teri ng In some enviro.
11-21 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 11 Configuring IGMP Sno oping and M VR Con f ig u ri n g IG M P Fi lte r in g Beginn ing in privileged EXEC mode.
11-22 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 11 Configuring IGMP Snooping and MVR Conf igurin g IGM P Filt ering Applying IGMP P rofil es T o contro l acces.
11-23 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 11 Configuring IGMP Sno oping and M VR Con f ig u ri n g IG M P Fi lte r in g Setting th e Maximum Numbe r of IGMP Groups Y ou c an set the maxim um num ber of IG MP gr oups th at a La yer 2 i nterfa ce can j oin.
11-24 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 11 Configuring IGMP Snooping and MVR Displaying IGMP Filterin g Configura ti on Displaying IGMP Filtering Confi.
C HAPTER 12-1 Catalyst 3550 Multilaye r Switch Software Configu ration Guide 78-11194-03 12 Configuring Port-Base d Traffic Control This cha pter describ es how to con figure the port-base d traffic contr ol feature s on your swit ch.
12-2 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 12 Configuring Port-Based Traffic Contr o l Configuring Stor m Control Note When the rate of multicast traf fic exceeds a se t threshold, all incoming traff ic (broadcast, multicast, and unicast) is dropped until the lev el drops below the threshold level .
12-3 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 12 Configuring Port -Based Tra ffic Control Configuring Storm Control Note Be for e IO S Release 12.
12-4 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 12 Configuring Port-Based Traffic Contr o l Configuring Stor m Control T o disa bl e stor m con tro l, us e the no storm-control broadcast level , no storm-contr ol multicast level , or no storm-contro l unicast level int erf ac e c onf igur ati on comm an ds.
12-5 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 12 Configuring Port -Based Tra ffic Control Configuring Protected Ports Configuring Prote cted Ports Some appl ic.
12-6 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 12 Configuring Port-Based Traffic Contr o l Configur ing Port Blocking This e xa mple sh ows h ow to c onfig ure.
12-7 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 12 Configuring Port -Based Tra ffic Control Configuring Port Blocking T o r etur n t he inter fa ce t o the defa ult co nditi on wher e n o tr af fic is blocked, use th e no switchport block { multicast | unicast } interf ace configur ation co mmands.
12-8 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 12 Configuring Port-Based Traffic Contr o l Configuring Port Security Configuring Po rt Security Y ou can use the port securi ty feature to restrict in put to an interface by limitin g and identifying MAC addresses o f the stations allowed to access the por t.
12-9 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 12 Configuring Port -Based Tra ffic Control Confi guring Port Security Default Port Security Configuration T able 12-1 sh ows t he de faul t po rt se curi ty conf igura ti on fo r a n inter fac e.
12-10 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 12 Configuring Port-Based Traffic Contr o l Configuring Port Security T o r eturn the inte rface to the de fault co ndition as not a secur e port, u se the no switchport port -security interfac e config uration comm and.
12-11 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 12 Configuring Port -Based Tra ffic Control Displayin g Port-Based Tr affic Contr ol Settings This e xampl e sh ow s how to c onfig ure a secu re MAC a ddres s on Fa st E the rnet port 12 an d v eri fy the config urati on.
12-12 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 12 Configuring Port-Based Traffic Contr o l Displaying Port-Base d Traffic Co ntrol Settings This is a an exam .
12-13 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 12 Configuring Port -Based Tra ffic Control Displayin g Port-Based Tr affic Contr ol Settings This is an example of ou tput from the show storm-control command wh en no keyw ords are e ntered .
12-14 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 12 Configuring Port-Based Traffic Contr o l Displaying Port-Base d Traffic Co ntrol Settings.
C HAPTER 13-1 Catalyst 3550 Multilaye r Switch Software Configu ration Guide 78-11194-03 13 Configuring CDP This c hapt er d escrib es how to c on figur e Ci sco D isc overy Pr otocol (C DP) on you r switch.
13-2 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapte r 13 Co nfigu ring CD P Conf igurin g CDP Configuring CDP These sec tions incl ude CDP con figura tion infor mati.
13-3 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 13 Configuring CDP C onfiguring CDP Use the no form of th e CDP com mands to return t o the de fault set tings. This exam ple shows ho w to configu re and verif y CDP charact eristics.
13-4 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapte r 13 Co nfigu ring CD P Conf igurin g CDP This e xample sh ows h ow t o e nabl e CDP i f i t ha s be en disabl ed.
13-5 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 13 Configuring CDP Monitoring and Maintaining CDP Monitoring and Maintaining CDP T o monitor and ma inta in C DP on yo ur de vice, perf or m one o r more of thes e t asks, be ginn ing in privile ged EXE C mode.
13-6 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapte r 13 Co nfigu ring CD P Monito rin g and Mai nt aining CDP Switch# show cdp entry * ------------------------- Device ID: Switch Entry address(es): IP address: 10.1.
13-7 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 13 Configuring CDP Monitoring and Maintaining CDP Switch# show cdp interface GigabitEthernet0/1 is up, line proto.
13-8 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapte r 13 Co nfigu ring CD P Monito rin g and Mai nt aining CDP.
C HAPTER 14-1 Catalyst 3550 Multilaye r Switch Software Configu ration Guide 78-11194-03 14 Configuring UDLD This c hap ter d esc rib es how to c on figur e the UniD ire ction al Li nk De tect ion ( UDL D) pro toc ol on y our switch.
14-2 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 14 Configuring UDLD Unders tan ding UDL D UDLD oper ates by us ing two mech anisms: • Neighbor datab ase maint.
14-3 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 14 Configuring UD LD Configur ing UDLD Configuring UDLD This se cti on de sc ribes how to c onfi gure U DLD on y our swi tch .
14-4 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 14 Configuring UDLD Conf igurin g UDLD T o disable UDL D global ly on fiber-opt ic interfa ces, use th e no udld enable gl obal con figur ati on comm and.
14-5 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 14 Configuring UD LD Displaying UDLD Status Displaying UDLD Status T o di splay the UDLD status for the specified interf ace or for all interfac es, use the show udld [ interface-id ] privi leged E XEC command .
14-6 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 14 Configuring UDLD Displa ying U DLD Statu s.
C HAPTER 15-1 Catalyst 3550 Multilaye r Switch Software Configu ration Guide 78-11194-03 15 Configuring SPAN This chapte r descr ibes how t o conf igure Swit ch Port Anal yzer (SP AN) o n your switch .
15-2 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 15 Configuring SP AN Unders tan din g SPA N Figur e 15-1 Example SP AN Conf iguration Only tr affic th at en ter.
15-3 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 15 Configuring SPAN Understa nding SPAN Y ou can co nfigure SP AN sessio ns on disabl ed ports ; howev er , a SP A N session do es not beco me active unless you ena ble the destina tion por t and at l east one source port or VLA N for t hat session.
15-4 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 15 Configuring SP AN Unders tan din g SPA N Source Port A source port (also ca lled a monitored port ) is a swit ched or rout ed por t t hat you mon ito r fo r ne tw ork traf fic analys is.
15-5 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 15 Configuring SPAN Understa nding SPAN VLAN-Based SPAN VLAN-ba sed SP AN (VSP AN) is th e anal ysis of the n etw ork t raffic in on e or m ore VL ANs.
15-6 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 15 Configuring SP AN Configuring SPAN • VLAN and trunk ing — Y ou can modi fy VLA N member ship or trun k settings fo r source and destinatio n ports at any time.
15-7 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 15 Configuring SPAN Configuring SPAN Default SPAN Configuration T able 15-1 sh ows the default SP AN configuration. This release supp orts only local SP AN; remote SP AN (RSP AN) is not supported.
15-8 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 15 Configuring SP AN Configuring SPAN • The no monitor session session_ number global con figur ation c om mand remo ve s a so urce or destinati on port f rom th e SP AN session or remo ve s a sourc e VLAN fro m the SP AN session.
15-9 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 15 Configuring SPAN Configuring SPAN T o remove the ent ire SP AN session , use the no monitor session sessio n_numbe r globa l c onfig urat ion comman d.
15-10 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 15 Configuring SP AN Configuring SPAN Removin g Ports from a SPAN S ession Begi nning in pr ivile ged EXEC mo d.
15-11 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 15 Configuring SPAN Configuring SPAN This e xampl e sh ow s how to di sable re ceiv ed tra ffic moni tor ing o n.
15-12 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 15 Configuring SP AN Configuring SPAN This ex ample shows how to c lear any existin g configur ation on SP AN session 2, config ure SP AN session 2 to monitor receive d traff ic on all ports belonging to VLANs 1 through 3, and sen d it to destination port 7.
15-13 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 15 Configuring SPAN Displaying S PAN Status T o monitor al l VLANs on th e trunk por t, use the no monitor session session_nu mber filter global config urati on comm and.
15-14 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 15 Configuring SP AN Displaying SPAN Status.
C HAPTER 16-1 Catalyst 3550 Multilaye r Switch Software Configu ration Guide 78-11194-03 16 Configuring RMON This cha pter describ es how to confi gure Remo te Network Monitor ing (RMON ) on your switc h.
16-2 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 16 Configuring RMON Conf iguring R MON Figur e 1 6-1 Remote Mo nito r ing Exam ple The switc h supports t hese R.
16-3 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 16 Configuring RMO N Confi guring RMON Default RMON Configuration RMON is di sabled by default; no alarms or eve nts are co nfigured. Only RMON 1 is supp orted on the switch.
16-4 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 16 Configuring RMON Conf iguring R MON T o d isable an alarm, use th e no rmon alarm nu mber g l obal co nfigu ra tion c omma nd o n eac h alar m you config ure d.
16-5 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 16 Configuring RMO N Confi guring RMON Configuring RMON Collection on an Interface Y ou must fir st config ure RMON ala rms and e vents to displa y colle ction informa tion.
16-6 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 16 Configuring RMON Displa ying RM ON Status T o disable the collect io n of gr oup Ether net statistics, u se the n o rm on c ol le ct io n st ats inde x interface config urati on comm and.
C HAPTER 17-1 Catalyst 3550 Multilaye r Switch Software Configu ration Guide 78-11194-03 17 Configuring System Message Logg ing This chapt er describ es how to configur e system messa ge logging on yo ur switch.
17-2 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 17 Configur ing System Message Logg ing Configur ing System Mes sage Logg ing Configuring Sy stem Me ssage Logging This se cti on de sc ribes how to c onfi gure syst em messag e logg ing.
17-3 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 17 Configuring Sys tem Messa ge Loggin g Config uring Syst em Message Logging This exam ple shows a partia l swit.
17-4 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 17 Configur ing System Message Logg ing Configur ing System Mes sage Logg ing Disabling an d Enab ling Me ssage Lo gging Message l ogging is enab led by defa ult. It must be enable d to sen d mes sages to any destin ation other than the conso le.
17-5 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 17 Configuring Sys tem Messa ge Loggin g Config uring Syst em Message Logging The log ging buffer ed global c onfigura tion com mand copi es logg ing messa ges to an int ernal buffer .
17-6 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 17 Configur ing System Message Logg ing Configur ing System Mes sage Logg ing Synchronizing Log M essages Y ou c.
17-7 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 17 Configuring Sys tem Messa ge Loggin g Config uring Syst em Message Logging T o disable synchroni zation of uns.
17-8 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 17 Configur ing System Message Logg ing Configur ing System Mes sage Logg ing Enabling a nd Disab ling Seq uence.
17-9 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 17 Configuring Sys tem Messa ge Loggin g Config uring Syst em Message Logging Note Spe cifying a level causes messages at th at level and numerical ly lower levels to be displa yed at the destination.
17-10 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 17 Configur ing System Message Logg ing Configur ing System Mes sage Logg ing Limiting Syslog Messages Sent to .
17-11 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 17 Configuring Sys tem Messa ge Loggin g Config uring Syst em Message Logging Logging Messages to a UNIX Syslog Daemo n Before yo u ca n send system log m essages to a UNIX syslog serve r , you m ust co nfigure the syslog daemon on a UNIX ser ver .
17-12 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 17 Configur ing System Message Logg ing Display ing the Log gi ng Configur ation T o remove a syslog serv er , use the no l ogging ho st global co nfigura tion co mman d, and spe cify the syslog serv er IP a ddress.
C HAPTER 18-1 Catalyst 3550 Multilaye r Switch Software Configu ration Guide 78-11194-03 18 Configuring SNMP This c hapt er d escrib es how to c on figur e t he Si mpl e N etwork M ana geme nt Pr otoc ol ( SNMP) on your switch.
18-2 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 18 Configuring SNMP Unders tan ding SNMP SNMP Versio ns This softw are release suppo rts these SNMP ver sions: • SNMPv1 — The Simple Network Mana geme nt Pr otocol, a Fu ll Inte rnet S tanda rd, d efined i n RFC 1 15 7.
18-3 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 18 Configuring SNM P Underst anding SN MP SNMP Agen t Fun ctions The SNMP a gent responds to SNMP manage r requests as follows: • Get a MIB v ar iab le — Th e SNMP a gent begi ns this f unc tio n in resp onse t o a re quest f rom th e NM S.
18-4 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 18 Configuring SNMP Conf iguri ng SN MP Figur e 18-1 SNMP Netw or k For inf orm atio n on su ppo rted M IB s a nd how to a cce ss th em , see Ap pendi x A, “ Suppo rted M IB s.
18-5 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 18 Configuring SNM P Configuring SNMP Disabling the SNMP Agent Beginn ing in privil eged EXEC mode, follo w these step s to disable th e SNMP agent: No spec ific IOS comm and exists t o enable SNMP .
18-6 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 18 Configuring SNMP Conf iguri ng SN MP Note T o disable ac cess for an SNMP communit y , set the community string for that co mmunity to the null string (do not enter a val ue for the community st ring).
18-7 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 18 Configuring SNM P Configuring SNMP Config ur ing Tr ap Mana ge rs an d Enab lin g Trap s A trap mana ger is a mana gement sta tion that re ceive s and proc esses tra ps.
18-8 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 18 Configuring SNMP Conf iguri ng SN MP Beginning in privil eged EXEC mode, follow these steps to config ure the.
18-9 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 18 Configuring SNM P Configuring SNMP Setting th e Agent C ontact and Location In formation Beginn ing in privil .
18-10 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 18 Configuring SNMP Displaying SNM P Status SNMP Examp les This exam ple shows how to enab le SNMPv1 an d SNMPv2C. Th e configur ation permits any SNMP manager to access all objects with read-only permissions using the community string public .
C HAPTER 19-1 Catalyst 3550 Multilaye r Switch Software Configu ration Guide 78-11194-03 19 Configuring Network Security with ACLs This c hapt er d escri b es how to con figur e ne twork se cu rity on you r s witc h b y usi ng acc ess c ontr ol l ist s (ACLs), whic h are also r eferred to in commands and tables a s access lists.
19-2 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 19 Configuring Network Security with ACLs Unders tandin g A CLs Switches tra ditionally oper a te at Layer 2 only , switc hing traf fic within a VLAN, whereas rout ers route traf fic betwee n VLANs.
19-3 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 19 Configuring Net w ork Securit y with ACLs Unde rsta ndi n g AC Ls One ACL ca n be used with multiple fe atures fo r a given inter face, and one featu re can use multipl e ACLs.
19-4 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 19 Configuring Network Security with ACLs Unders tandin g A CLs W i th VLAN ma ps, forwa rding of pac kets is pe rmitte d or denied , based on th e action spe cified i n the map.
19-5 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 19 Configuring Net w ork Securit y with ACLs Configu ri n g Ro uter A CL s • Packet B i s fr om host 1 0.2 .2. 2, por t 650 01, goin g t o ho st 10. 1.1.2 on t he T e lnet port .
19-6 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 19 Configuring Network Security with ACLs Configur ing Router AC Ls These fac tors can cause pack ets to be sent.
19-7 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 19 Configuring Net w ork Securit y with ACLs Configu ri n g Ro uter A CL s These are t he ste ps to us e ACLs: Step 1 Create an A CL by sp ec ify in g a n a cc es s li st nu mb er or n am e an d ac c ess co ndit ions .
19-8 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 19 Configuring Network Security with ACLs Configur ing Router AC Ls Note In addition to nu mbered standa rd and exten ded ACLs, you can also crea te standard an d extende d named IP ACLs usi ng the sup ported nu mbers.
19-9 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 19 Configuring Net w ork Securit y with ACLs Configu ri n g Ro uter A CL s Note When creating an ACL, remember th.
19-10 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 19 Configuring Network Security with ACLs Configur ing Router AC Ls Pro tocol ( igrp ), an y Inte rior Protoc o.
19-11 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 19 Configuring Net w ork Securit y with ACLs Configu ri n g Ro uter A CL s Beginn ing in privileged EXEC mode, fo llow these s teps to creat e an extended ACL: Command Purpo se Step 1 configur e terminal Enter gl obal co nfigu ration mod e.
19-12 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 19 Configuring Network Security with ACLs Configur ing Router AC Ls or access-list access- list-num ber { deny .
19-13 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 19 Configuring Net w ork Securit y with ACLs Configu ri n g Ro uter A CL s Use the no access-list access-list-numb er global conf igur ation comman d to del ete the entir e acces s list.
19-14 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 19 Configuring Network Security with ACLs Configur ing Router AC Ls Creating Named Standard and Extende d ACLs Y ou c an ide ntify I P ACL s with an alp hanum eric str ing ( a name ) rathe r than a num ber .
19-15 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 19 Configuring Net w ork Securit y with ACLs Configu ri n g Ro uter A CL s Begin ning in privil eged EXEC mode ,.
19-16 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 19 Configuring Network Security with ACLs Configur ing Router AC Ls and argument are refe renced in the nam ed .
19-17 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 19 Configuring Net w ork Securit y with ACLs Configu ri n g Ro uter A CL s Switch(config-time-range)# exit Switc.
19-18 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 19 Configuring Network Security with ACLs Configur ing Router AC Ls Including Comments About Entries in ACLs Y ou can use the re m ar k keyword to include co mments (r emarks ) about en tries in any IP sta n dard or exten ded ACL .
19-19 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 19 Configuring Net w ork Securit y with ACLs Configu ri n g Ro uter A CL s Beginnin g in pri vileg ed EX EC mode.
19-20 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 19 Configuring Network Security with ACLs Configur ing Router AC Ls Note Th e ip access-gr oup int erfa c e c onf igura ti on co mm an d is onl y val id w h en appl ie d to a Lay er 3 interf ace: an SVI , a Layer 3 EtherC hannel, or a rou ted port .
19-21 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 19 Configuring Net w ork Securit y with ACLs Configu ri n g Ro uter A CL s This is an example of ou tput from th.
19-22 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 19 Configuring Network Security with ACLs Configur ing Router AC Ls This exam ple shows how to use the show run.
19-23 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 19 Configuring Net w ork Securit y with ACLs Configu ri n g Ro uter A CL s Figur e 1 9-3 Usi ng Router A CLs to .
19-24 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 19 Configuring Network Security with ACLs Configur ing Router AC Ls Numbered ACLs In this exam ple, n etwork 36.0.0.0 is a Class A network w hose seco nd octet specif ies a subnet ; that is, its subnet ma sk is 255 .
19-25 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 19 Configuring Net w ork Securit y with ACLs Configu ri n g Ro uter A CL s The mark eting_group ACL allows any TCP T elnet tr aff ic to the destination addr ess and wildcard 171.
19-26 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 19 Configuring Network Security with ACLs Configur ing Router AC Ls In this exa mple of a named ACL , the Jones.
19-27 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 19 Configuring Net w ork Securit y with ACLs Configuring VLAN Maps This is a a n examp le of a log for an ext ended ACL: 01:24:23:%SEC-6-IPACCESSLOGDP:list ext1 permitted icmp 10.
19-28 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 19 Configuring Network Security with ACLs Configur ing VLA N Maps Step 4 Use the vlan filter globa l c onf igura ti on comm an d t o a pply a VLA N ma p to on e or more V LA Ns .
19-29 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 19 Configuring Net w ork Securit y with ACLs Configuring VLAN Maps Beginn ing in privileged EXEC mode, fo llow these s teps to creat e a named MAC exten d ed ACL: Use the no mac access-li st extended name global configurat ion command to delete the entire ACL.
19-30 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 19 Configuring Network Security with ACLs Configur ing VLA N Maps Creating a VL AN Map Each VL AN map co nsists of an ordered ser ies of ent ries.
19-31 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 19 Configuring Net w ork Securit y with ACLs Configuring VLAN Maps This example shows ho w to crea te a VLAN ma p to permit a p acket. A C L ip2 permits UDP pa ckets and any packe ts that match t he ip2 ACL are fo rwarde d.
19-32 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 19 Configuring Network Security with ACLs Configur ing VLA N Maps Switch(config)# mac access-list extended good-hosts Switch(config-ext-macl)# permit host 000.0c00.
19-33 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 19 Configuring Net w ork Securit y with ACLs Configuring VLAN Maps Displaying VLAN Map Information Y ou can displa y informat ion about VLA N access m aps or VLAN filt ers.
19-34 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 19 Configuring Network Security with ACLs Configur ing VLA N Maps Wiring Closet Configuration In a wiring clo set configu ration, the Catalyst 3550 switc h might not be runni ng the enhanced multilaye r software i mage.
19-35 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 19 Configuring Net w ork Securit y with ACLs Configuring VLAN Maps Then , apply VL AN acc ess map map2 to VLAN 1. Switch(config)# vlan filter map2 vlan 1 Denying Access to a Server on Another VLAN Y ou can restr ict access to a server on another V LAN.
19-36 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 19 Configuring Network Security with ACLs Using VL AN Ma ps wi th Rout er AC Ls Using VLAN Maps with Router ACLs T o access control both bridge d and route d traffic, you ca n use VLAN ma ps only or a combi nation of router ACLs and VLAN maps.
19-37 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 19 Configuring Net w ork Securit y with ACLs Using VLAN Maps with Router ACLs • A void inclu ding Laye r 4 informa tion in an A CL; addi ng this in format ion compl icat es the merging process.
19-38 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 19 Configuring Network Security with ACLs Using VL AN Ma ps wi th Rout er AC Ls This out put fr om th e show f .
19-39 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 19 Configuring Net w ork Securit y with ACLs Using VLAN Maps with Router ACLs Note Whe n conf igurin g ACLs on t.
19-40 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 19 Configuring Network Security with ACLs Using VL AN Ma ps wi th Rout er AC Ls ACLs and Bridged Packets Figure 19-7 show s how an ACL is applied on fal lback-br idged pac kets.
19-41 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 19 Configuring Net w ork Securit y with ACLs Using VLAN Maps with Router ACLs ACLs and Routed Packe ts Figure 19-8 show s how ACLs ar e applied on routed pa ckets.
19-42 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 19 Configuring Network Security with ACLs Using VL AN Ma ps wi th Rout er AC Ls ACLs and Multicast Pa ckets Figure 19-9 sh ows how ACLs are applied on packets that a re replica ted for IP multicasting.
C HAPTER 20-1 Catalyst 3550 Multilaye r Switch Software Configu ration Guide 78-11194-03 20 Configuring QoS This chap ter descri b es how to c o nfigure quality of service (QoS ) on your switch. W ith this feature, you can provi de prefe rentia l treatm ent to ce rtai n traffic at the ex pense of o thers.
20-2 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapt e r 20 Co nf i gur i n g Qo S Unders tan ding QoS type of serv ice (TOS) fiel d to c arry the classificat ion ( clas s ) inform ation. Clas sifica tion can also be carrie d in the Layer 2 frame.
20-3 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 20 Configuring Qo S Under sta n din g Q oS All swi tches and ro uters t hat access th e Internet rely on the cla .
20-4 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapt e r 20 Co nf i gur i n g Qo S Unders tan ding QoS Figu re 20-2 Basi c QoS Mo de l Classification Classif ica tion i s the p roce ss o f di stin guishin g o ne kin d o f traffic fr om an othe r by ex am ini ng t he f iel ds in the packet.
20-5 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 20 Configuring Qo S Under sta n din g Q oS For IP t raffic, y ou ha ve t hese c lass ifi cat ion opti ons as sh o.
20-6 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapt e r 20 Co nf i gur i n g Qo S Unders tan ding QoS Figur e 2 0-3 Classification Flo wc har t 46976 Generate the DSCP based on IP precedence in pack et. Use the IP-precedence-to-DSCP map .
20-7 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 20 Configuring Qo S Under sta n din g Q oS Classification Based on QoS ACLs Y ou c an u se IP stan dard, I P e xte nded, and L ayer 2 MAC A CLs to defi ne a gro up of pa ck ets with t he same char acteristics ( class ).
20-8 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapt e r 20 Co nf i gur i n g Qo S Unders tan ding QoS The poli cy map can al so cont ain com mands tha t define the po licer, the bandwidth l imitati ons of the traf fic, and the acti o n to take if the limits are excee ded.
20-9 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 20 Configuring Qo S Under sta n din g Q oS Y ou co nfi gure the b ucke t de pth (the m axi mum b urst t hat is t .
20-10 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapt e r 20 Co nf i gur i n g Qo S Unders tan ding QoS Figur e 2 0-4 Po licing and M ar king Flow char t 46977 Ye s Ye s No No P ass through Drop Mark Read the DSCP of the pack et.
20-11 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 20 Configuring Qo S Under sta n din g Q oS Mapping T ables During QoS processing, the switch represents the prio.
20-12 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapt e r 20 Co nf i gur i n g Qo S Unders tan ding QoS Queuein g an d Sc he dulin g After a p acket is poli ce d and m.
20-13 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 20 Configuring Qo S Under sta n din g Q oS During the que uei ng and sc hedu l ing p ro cess, the swit ch us es .
20-14 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapt e r 20 Co nf i gur i n g Qo S Unders tan ding QoS WRED Cisco ’ s impl emen t ation of Rand om Ea rly De tec tio.
20-15 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 20 Configuring Qo S Under sta n din g Q oS Queueing and Scheduling on 10/ 100 Ethernet Ports Figure 20-6 show s the queue ing and sched uling flow chart for 10/100 Eth ernet port s.
20-16 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapt e r 20 Co nf i gur i n g Qo S Unders tan ding QoS Each m ini mum- re serve le ve l is conf igur ed wi th a buffer siz e.
20-17 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 20 Configuring Qo S Under sta n din g Q oS Packet Modification A packe t is clas sified , police d, and q ueued to provide Q o S.
20-18 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapt e r 20 Co nf i gur i n g Qo S Conf igurin g QoS Configuring QoS Before conf iguri ng Q oS, y ou mu st ha ve a thoro ugh unde rsta nding o f th ese i te ms: • The type s of ap pli cat ions use d and t he traffi c patte rn s on y our ne tw ork .
20-19 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 20 Configuring Qo S Confi guring Qo S The defa ult port CoS va lue is 0. The defa ult port trust stat e on all port s is untrust ed. No pol icy ma ps are config ured.
20-20 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapt e r 20 Co nf i gur i n g Qo S Conf igurin g QoS Configuration Guidelines Before begi nning th e QoS configu ratio.
20-21 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 20 Configuring Qo S Confi guring Qo S Enabling Qo S Globally By default, QoS is disabled on the switch, whi ch means that the switc h of fers best-ef f ort service to each packet rega rdless of t he pac ket cont ents or size.
20-22 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapt e r 20 Co nf i gur i n g Qo S Conf igurin g QoS Configuring the Trust State on Po rts within the QoS Domain Packets en tering a QoS domain are clas sifie d at the edge of the Qo S domain.
20-23 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 20 Configuring Qo S Confi guring Qo S Beginning in p rivileged EXEC mode, fo llow these steps to configure the p.
20-24 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapt e r 20 Co nf i gur i n g Qo S Conf igurin g QoS Configuring the CoS Val ue for an Interface QoS assigns the CoS value specified wi th the mls qos cos interfa ce conf igurati on comma nd to untagge d frames re ceive d on truste d and untru sted port s.
20-25 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 20 Configuring Qo S Confi guring Qo S Configuring the DSCP Trust Sta te on a Port Bordering Another Qo S Domain .
20-26 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapt e r 20 Co nf i gur i n g Qo S Conf igurin g QoS T o return a po rt to its n on-trusted state , use the no mls qos trust int erfac e config urati on comm and.
20-27 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 20 Configuring Qo S Confi guring Qo S Classifying Traffic by Using ACLs Y ou can classify IP traffic by using IP st andard or IP ext ended AC Ls; you can cla ssify non -IP traffic by usin g Layer 2 MAC A CLs.
20-28 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapt e r 20 Co nf i gur i n g Qo S Conf igurin g QoS Begin ning in privil eged EXEC mode, fo llow these steps to cr eate an IP exte nded ACL fo r IP traf fic: T o delete an access list, use the no access-list acce ss-list- number g loba l c onfi gurat ion c omma nd.
20-29 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 20 Configuring Qo S Confi guring Qo S This exam ple shows ho w to create an ACL that permits PIM traf fic from any sourc e to a destinat ion group addr ess of 224.
20-30 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapt e r 20 Co nf i gur i n g Qo S Conf igurin g QoS This e xample s hows how to cr eat e a Layer 2 MAC ACL wi th two per mit st ateme nts. Th e first statem ent allows t raffic from the host with MA C address 000 1.
20-31 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 20 Configuring Qo S Confi guring Qo S T o delete an existin g class map, use the no class-map class- map-name [ match-all | match-any ] gl ob al config urat ion comm and.
20-32 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapt e r 20 Co nf i gur i n g Qo S Conf igurin g QoS This exa mple shows how to creat e a class map called class2 , which matches incoming traf fic with DSCP value s of 10, 11, and 12 .
20-33 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 20 Configuring Qo S Confi guring Qo S Step 4 policy-map policy-ma p-name Cr eate a policy map by en terin g the polic y map name, and ente r poli cy-map c onfigurati o n mo de.
20-34 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapt e r 20 Co nf i gur i n g Qo S Conf igurin g QoS Step 6 trust [ co s | dscp | ip-pr ecedence ] Configure the trust state , wh ich selects the value that QoS uses as the source of the inter nal DSCP value.
20-35 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 20 Configuring Qo S Confi guring Qo S T o delete an existing policy map, use the no policy-map policy-ma p-nam e glob al confi gura tion comm and. T o delet e an exist ing class ma p, use the no class class-map-nam e policy -map c onf igurat ion command.
20-36 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapt e r 20 Co nf i gur i n g Qo S Conf igurin g QoS This examp le shows how to crea te a policy map and att ach it to an ingress in terface. In the configuration, the IP standard ACL permits traff ic f rom network 10.
20-37 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 20 Configuring Qo S Confi guring Qo S Classifying, Policing, and Marking Traff ic by Using Aggregate Policers By using an aggreg ate police r , you can cr eate a p olicer th at is sha red by multi p le traf fic classes within the same p oli cy m ap .
20-38 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapt e r 20 Co nf i gur i n g Qo S Conf igurin g QoS T o remove th e specif ied aggr egate police r from a po licy map, use the no police aggr ega te aggregate-polic er-name pol ic y m ap c on figu ratio n m ode.
20-39 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 20 Configuring Qo S Confi guring Qo S Configuring DSCP Maps This se cti on desc ribe s how to c onf igur e the DSCP m a ps.
20-40 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapt e r 20 Co nf i gur i n g Qo S Conf igurin g QoS This e xample sh ows h ow t o mo dify a nd displa y the CoS-t o-D.
20-41 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 20 Configuring Qo S Confi guring Qo S Configuring the Policed- DSCP Map Y ou use the policed- DSCP map to mark down a DSCP value to a new value as the result of a policing and marki ng actio n.
20-42 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapt e r 20 Co nf i gur i n g Qo S Conf igurin g QoS Configuring the DSCP-to- CoS Map Y ou use t he DSCP-to -CoS map to gene rate a CoS valu e, which i s used to select one of the fo ur egress queues.
20-43 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 20 Configuring Qo S Confi guring Qo S Configuring the DSCP-to- DSCP-Muta tion Map Y ou appl y the DSCP -to-DSC P-mu tation map to a port a t the boundar y of a QoS adm inistra tive d omain.
20-44 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapt e r 20 Co nf i gur i n g Qo S Conf igurin g QoS This example shows how to define the DSCP-to-DSCP-mutation map.
20-45 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 20 Configuring Qo S Confi guring Qo S Mapping CoS Values to Select Egress Queues Beginning in privile ged EXEC m.
20-46 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapt e r 20 Co nf i gur i n g Qo S Conf igurin g QoS Configuring the Egress Queue Size Ratios Beginnin g in pr ivilege.
20-47 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 20 Configuring Qo S Confi guring Qo S Configuring Tail-Dr op Threshold Percentag es T ail drop is th e defa ult cong es tion -avoi d ance te ch nique on G igab it- capa ble E the rnet po rts.
20-48 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapt e r 20 Co nf i gur i n g Qo S Conf igurin g QoS T o retur n to the default thresholds , use the no wrr -queue thr eshold queue-id interface conf iguration comm and.
20-49 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 20 Configuring Qo S Confi guring Qo S T o disa ble WR ED, use the no wrr random-detect max-threshold [ queue-id ] i nte rfac e conf igur ati on comm and.
20-50 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapt e r 20 Co nf i gur i n g Qo S Conf igurin g QoS Configuring the Egress Expedite Que ue Y ou can ens ure th at cer tai n packets have prio rit y o ve r all othe rs by queuing them in th e eg re s s exp ed ite queue.
20-51 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 20 Configuring Qo S Confi guring Qo S T o return to the default bandwidth setti ng, use the no wrr -queue bandwidth inter face configu ration comm and.
20-52 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapt e r 20 Co nf i gur i n g Qo S Conf igurin g QoS This section con tains this configuratio n information: • Mappi.
20-53 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 20 Configuring Qo S Confi guring Qo S Configuring the Minimum- Reserve Levels Y ou can co nfigur e the buf fer size of the mi nimum- reser ve levels on all 10/100 por ts and assig n the minimum- rese rve level to an egress queue on a 10/100 Et hernet port.
20-54 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapt e r 20 Co nf i gur i n g Qo S Conf igurin g QoS Configuring the Egress Expedite Que ue Y ou can ens ure th at cer tai n packets have prio rit y o ve r all othe rs by queuing them in th e eg re s s exp ed ite queue.
20-55 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 20 Configuring Qo S Confi guring Qo S T o return to the default bandwidth setti ng, use the no wrr -queue bandwidth inter face configu ration comm and.
20-56 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapt e r 20 Co nf i gur i n g Qo S Displa ying QoS Information Displaying QoS Information T o di splay the curren t Qo.
20-57 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 20 Configuring Qo S QoS Config uratio n Examples Figur e 20-1 0 QoS Configu ratio n Example Netw or k QoS Config.
20-58 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapt e r 20 Co nf i gur i n g Qo S QoS Configura tion Examp les For the Catalys t 3500 XL and 2900 XL switch es, CoS c.
20-59 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 20 Configuring Qo S QoS Config uratio n Examples QoS Configuration for the Distribution Layer This ex ample focu ses on the configuratio n steps f o r the Cata lyst 3550-12G multil ayer switch at the distribu tion l aye r (see Figur e 20-10 ).
20-60 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapt e r 20 Co nf i gur i n g Qo S QoS Configura tion Examp les Step 5 switchport mode tr unk Conf igure t his port as a t runk port. Step 6 exit Return t o g loba l c onfi gur ation mo de .
20-61 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 20 Configuring Qo S QoS Config uratio n Examples Step 17 end Return to privile ged EXEC mode. Step 18 show mls qos interface and show interf aces V erify yo ur ent rie s.
20-62 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapt e r 20 Co nf i gur i n g Qo S QoS Configura tion Examp les.
C HAPTER 21-1 Catalyst 3550 Multilaye r Switch Software Configu ration Guide 78-11194-03 21 Configuring EtherChannel This c hapter describe s how to co nfigu re Ethe rChann el on La yer 2 and Laye r 3 i nterfa ce s. T o con figu re Layer 3 interfac es, you must have the enhanced multila yer software image (EMI ) installed on your switch.
21-2 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 21 Configur ing Ethe rChannel Unders tan ding Ether Channel Figur e 21 -1 T ypical EtherChannel Con figuration Understand ing Port-Chann el Interfaces Y ou crea te an Et herCha nnel for Layer 2 inte rfaces di fferently fr om Layer 3 i nterface s.
21-3 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 21 Configuring Eth erCh annel Underst anding E therChannel Figur e 2 1 -2 Relation ship of Ph ysical P ort s, Log.
21-4 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 21 Configur ing Ethe rChannel Unders tan ding Ether Channel PAgP Modes T able 21-1 show s the user-config urable Et herChann el mod es for the cha nnel-group interfac e config urati on comm and: on , aut o , and desirable .
21-5 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 21 Configuring Eth erCh annel Underst anding E therChannel Physical Learners an d Aggregate-P ort Learners Network devi ces are class ifie d as P AgP physica l learners or aggregate-p ort lear ners.
21-6 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 21 Configur ing Ethe rChannel Unders tan ding Ether Channel In Fi g ure 21-3 , an Ethe rCha nnel of four wor kstati ons c ommunic ates w ith a router .
21-7 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 21 Configuring Eth erCh annel Config uring Ether Channel Configuring Eth erChannel This secti on descri bes these.
21-8 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 21 Configur ing Ethe rChannel Configur ing Eth erChann el EtherChann el Configuratio n Guidelin es If imp rop erl y con fi gure d, som e Et her Cha nnel inte rf ace s a re a utom a tica lly disa ble d to a void net work loops and othe r proble ms.
21-9 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 21 Configuring Eth erCh annel Config uring Ether Channel Configurin g Layer 2 Ethe rChan nels Y ou configu re Lay.
21-10 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 21 Configur ing Ethe rChannel Configur ing Eth erChann el T o remove a n inte rface from the Ethe rChannel grou p, use the no channel-group inte rface conf igurat ion comm and.
21-11 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 21 Configuring Eth erCh annel Config uring Ether Channel Configurin g Layer 3 Ethe rChan nels T o confi gure L a.
21-12 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 21 Configur ing Ethe rChannel Configur ing Eth erChann el Configuring the Physical Interfac es Beginn ing in pr.
21-13 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 21 Configuring Eth erCh annel Config uring Ether Channel T o remove a n inte rface from the Ethe rChannel grou p, use the no channel-group inte rface conf igurat ion comm and.
21-14 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 21 Configur ing Ethe rChannel Configur ing Eth erChann el Beginnin g in pr ivi leged EX EC m od e, f oll ow t h.
21-15 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 21 Configuring Eth erCh annel Config uring Ether Channel Note Th e Cata lyst 35 50 suppo rts addr ess lea rning on ly on aggrega te por ts ev en thoug h the physical-port keywor d is provide d in the CLI .
21-16 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 21 Configur ing Ethe rChannel Displaying Eth erCh annel and PA gP Status Displaying EtherCh annel and PAgP Stat.
C HAPTER 22-1 Catalyst 3550 Multilaye r Switch Software Configu ration Guide 78-11194-03 22 Configuring IP Unicast Ro uting This chap ter describes how to configure IP u nicast routing o n your multilayer sw itch. T o u se this featur e, you must have the enhanced multilayer software i mage instal led on your switch.
22-2 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unicast Routing Unders tan din g Routing Understandin g Routing Networ k d evice s in di fferent VLA Ns ca nnot co mm unic ate w ith one an oth er w it hout a L ay er 3 devi ce (rout er) to r oute tra ffic betw een the VLANs.
22-3 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unic as t Routing Steps f or Conf iguri ng Routi ng When Host A in VLAN 10 need s to com municat e with Hos t B in VLAN 10, it send s a pa cket add resse d to that host.
22-4 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unicast Routing Conf igurin g IP Ad dres sing Configuring IP Addre ssing A requ ire d task for.
22-5 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unic as t Routing Config uring IP Address ing Assigning IP Address es to Netwo rk Interface s An IP address identifies a location to which IP packet s can be sent.
22-6 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unicast Routing Conf igurin g IP Ad dres sing Beginnin g in pri vileg ed EXEC mo de, fo llow t.
22-7 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unic as t Routing Config uring IP Address ing 0 input packets with dribble condition detected 0.
22-8 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unicast Routing Conf igurin g IP Ad dres sing Use of Subnet Zero Subnetti ng with a subnet a ddress o f z ero is st ron gly disc ourag ed beca use of th e proble ms that c an arise if a netwo rk a nd a subnet have th e same add resses.
22-9 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unic as t Routing Config uring IP Address ing In Figure 22 -2 , class less routin g is enab led. Whe n the host sen ds a packet to 120.20. 4.1, inst ead of discar ding the p acke t, the ro uter f orwa rds it to th e be st su pe rnet r out e.
22-10 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unicast Routing Conf igurin g IP Ad dres sing Begin ning in privil eged EXEC mode , follow th.
22-11 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unic as t Routing Config uring IP Address ing Y ou can per form these t asks to config ure add.
22-12 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unicast Routing Conf igurin g IP Ad dres sing This is a n exam ple of output fr om the show arp privileged EX EC command. Switch# show arp Protocol Address Age (min) Hardware Addr Type Interface Internet 10.
22-13 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unic as t Routing Config uring IP Address ing This is a n exam ple of output fr om the show in terfac es interface-id pri vileged EXEC comm and displaying AR P enc apsul ati on.
22-14 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unicast Routing Conf igurin g IP Ad dres sing This is an e xam ple of ou tput fo rm th e show i p inte rfac e pri v ileged EXEC command f or Giga bit Ethernet interf ace 0/3, wher e proxy ARP is enabled.
22-15 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unic as t Routing Config uring IP Address ing Ethern et MAC add ress, and t he hos t that s ent the re ques t se nds th e pack et to th e sw itch, which forw ards it to the intended host .
22-16 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unicast Routing Conf igurin g IP Ad dres sing The onl y re qui red t ask fo r I RDP ro uting o n an i n terfa ce is t o en able I RDP pr ocessin g on t ha t int er face.
22-17 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unic as t Routing Config uring IP Address ing GigabitEthernet0/3 has router discovery enabled Advertisements will occur between every 450 and 600 seconds.
22-18 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unicast Routing Conf igurin g IP Ad dres sing Beginnin g in pri vilege d EXEC mode, fo llow t.
22-19 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unic as t Routing Config uring IP Address ing If you do not spe cify any U DP po rt s wh en yo u con figu re the forw ard in g of U DP br oa dcast s, yo u a r e conf iguring th e router to act as a BOOTP for warding agent.
22-20 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unicast Routing Conf igurin g IP Ad dres sing Establishing an IP Broadcast Address The mo st po pula r IP b roa dca st a ddr ess (and th e d efau lt) is an a ddress c onsis ting of a ll on es (255.
22-21 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unic as t Routing Config uring IP Address ing Beginnin g in pr ivi leged EX EC mod e, fol low .
22-22 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unicast Routing Conf igurin g IP Ad dres sing Y ou can display specific stat istics, such as .
22-23 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unic as t Routing Config uring IP Address ing Switch# show ip redirects Default gateway is 172.
22-24 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unicast Routing Enablin g IP Ro uting GigabitEthernet0/1 is up, line protocol is up Internet .
22-25 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unic as t Routing Configuring RIP Configuring RI P The R outi ng Inf orm a tion Pro to col (RI P) is an i nte rior ga teway pr otoc ol (I GP) cre ate d fo r us e in smal l, homogene ou s n etw orks.
22-26 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unicast Routing Conf igurin g RIP For protoc ol-indep ende nt feature s that al so apply to RIP , see the “ Con figuring Prot ocol- Indepen dent Features ” section on page 22-53 .
22-27 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unic as t Routing Configuring RIP T o turn off t he RI P rout ing pr ocess, u se t he no router rip global conf igur at ion comm a nd.
22-28 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unicast Routing Conf igurin g RIP RIP Authentication RIP versio n 1 do es not suppo rt au the ntica tio n. If yo u ar e send ing a nd rec eivi ng RIP V e rsion 2 pa ck ets, you can enable RIP au thentica tion on a n interface.
22-29 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unic as t Routing Configuring RIP Note In general, di sabling split horizon i s not reco mmended un less you are certain t h at your applicati o n requires it to properly advertise routes.
22-30 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unicast Routing Conf igurin g IGRP Configuring IGRP Interio r Ga tewa y Routing Pr otoc ol ( .
22-31 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unic as t Routing Config uring IGRP Routers ru nning IGRP use flash and poi son-reve rse update s to spe ed up t he conv ergenc e of the routi ng algorit hm.
22-32 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unicast Routing Conf igurin g IGRP If varia nc e is con figur e d as de scrib ed i n the pr ec edi ng se cti on , IG RP or En ha nced IGRP di stribu tes traf f ic amon g multip le r out es of u nequal cost to the same destination.
22-33 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unic as t Routing Config uring IGRP T o shut d own an IGRP ro uti ng pro ce ss, use the no rout er igrp global conf igur ati on c om mand. This e xampl e sh ow s how to c onf igure a rou ter f or IGRP an d assi gn it a uton omo us system 1 09.
22-34 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unicast Routing Conf igurin g IGRP This is an example of ou tput from the show ip protocols privil eged EXEC comma nd that ve rifie s the IGRP confi gurat ion.
22-35 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unic as t Routing Config uring OSPF Configuring OSPF This section briefly describes how to configure Open S hortest Path First (OSPF).
22-36 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unicast Routing Configuring OSPF T able 22-7 Def ault OSPF Confi gurat ion Feature Default Setting Interface parameters Cost: No default cost predef ined.
22-37 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unic as t Routing Config uring OSPF Enabling OSPF requires that you create an OSPF routing process, specify the r ange of IP addr esses to be asso ciated with the routing pro cess, an d assign area IDs to be ass ociated wit h that range.
22-38 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unicast Routing Configuring OSPF This is an example of ou tput from the show ip protocols privil eged EXEC comma nd that ve rifie s the OSPF process ID.
22-39 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unic as t Routing Config uring OSPF Use the no form of these comman ds to remove the configured par ameter va lue or r eturn to the default v alue .
22-40 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unicast Routing Configuring OSPF Note The OSPF area ro uter con fi gurat ion c om mands a re a ll op tion al.
22-41 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unic as t Routing Config uring OSPF Switch# show ip ospf Routing Process "ospf 1" with ID 172.
22-42 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unicast Routing Configuring OSPF • Passive interfaces: Because inter f aces between two dev.
22-43 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unic as t Routing Config uring OSPF Change L SA Group P acing The OSPF LS A group pa cing featur e allows the route r to gr oup OSPF L SAs a nd pac e the refres hing, check-summin g, and aging functi ons for more effi cient router use .
22-44 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unicast Routing Configuring OSPF Monitoring OSPF Y ou can disp lay specif ic statis tics such as the co ntents of IP routing tables , caches, and databases .
22-45 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unic as t Routing Config uring OSPF This is a n exam ple of output fr om the show ip ospf database privi leged E XEC co mmand wh en no arguments or keyw ords ar e used: Switch# show ip ospf database O OSPF Router with ID (172.
22-46 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unicast Routing Configur ing EIG R P Configuring EIGRP Enhanc ed IG RP (EIGRP) is a Cisco p ropri etary en hance d ver sion of th e IGR P .
22-47 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unic as t Routing Configuring EIGRP feasi ble succ essors , but there ar e neig hbors adverti sing the dest inatio n, a r ecomputa tion mu st oc cur .
22-48 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unicast Routing Configur ing EIG R P T o cr eate an EIGRP routin g process, you mus t enable EI GRP and asso ciate netwo rks. EIGRP se nds update s to t he i nte rfac e s in t he spe ci fied n etw orks.
22-49 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unic as t Routing Configuring EIGRP Use the no forms of these co mmands to disabl e the featur e or return the sett ing to the defaul t value. This is a n exam ple of output fr om the show ip protocols privi le ged E X EC comm a nd for E IGRP .
22-50 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unicast Routing Configur ing EIG R P Use the no forms of th ese comman ds to disa ble the feat ure or return the setting to the defa ult val ue.
22-51 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unic as t Routing Configuring EIGRP Use the no forms of these commands to disable the feat ure or to return the setting to the default va lue. Monitoring and Maintaining EIGRP Y ou can d elete nei ghbors fr om the ne ighbor ta ble.
22-52 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unicast Routing Configur ing EIG R P This is a n exam ple of output fr om the show ip eigrp i.
22-53 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unic as t Routing Confi guring Protocol -Ind ependent Fe atures Configuring Proto col-Independ ent Features This secti on descri bes how to conf igure IP rou ting proto col-i ndepende nt featur es.
22-54 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unicast Routing Configur ing Protocol-I nde penden t Feature s Beginning in priv ileged EXEC .
22-55 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unic as t Routing Confi guring Protocol -Ind ependent Fe atures Beginning in privileged EXEC m.
22-56 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unicast Routing Configur ing Protocol-I nde penden t Feature s The switc h retains stat ic route s until yo u remove them (by using the no ip route global c onfi gur ation comman d).
22-57 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unic as t Routing Confi guring Protocol -Ind ependent Fe atures Beginning in privil eged EXEC .
22-58 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unicast Routing Configur ing Protocol-I nde penden t Feature s Beginning in privil eged EXEC .
22-59 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unic as t Routing Confi guring Protocol -Ind ependent Fe atures T o del ete an en try , use the no route-map map tag glo bal conf igurat ion co mmand or the no match or no set route -map conf igur ati on com mands.
22-60 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unicast Routing Configur ing Protocol-I nde penden t Feature s Y ou ca n d istr ibute r oute s f rom o ne rout ing do main int o anothe r and co ntro l rout e distri bu tion.
22-61 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unic as t Routing Confi guring Protocol -Ind ependent Fe atures Filtering Routing Information Y ou can filter routing protocol information by perfo rming the tasks described in this section.
22-62 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unicast Routing Configur ing Protocol-I nde penden t Feature s Controlling Advertising and Pr.
22-63 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unic as t Routing Confi guring Protocol -Ind ependent Fe atures T o remove a di stan ce def ini tio n, use the no distance rout er con fi gurat ion c om mand.
22-64 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unicast Routing Monito rin g and Mai nt aining th e IP Ne twork T o remove th e key ch ain, use t he no key chain name-of-cha in gl obal c onf igur ati on c omm and.
22-65 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unic as t Routing Monitoring and Maintaining the IP Network This is a n exa mpl e of o ut put .
22-66 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 22 Configuring IP Unicast Routing Monito rin g and Mai nt aining th e IP Ne twork This is an exa mp le of out pu t from th e show ip route supernets-only privi leged EXEC co mmand.
C HAPTER 23-1 Catalyst 3550 Multilaye r Switch Software Configu ration Guide 78-11194-03 23 Configuring HSRP This c hapter de scribe s h ow to use Hot Standby Rou ter Prot oco l (H SRP) to p rovid e rou t ing red undan cy for rout ing IP tra ffic wi thout bei ng dependen t on the av ailability o f any sing le router .
23-2 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 23 Configuring HSRP Unders tan din g H SRP Note Rou ter s in a n HSRP gr oup can be an y ro ute r int erfa ce that su ppo rts H SRP , i ncl udin g Cat aly st 355 0 routed ports a nd switch v irtual interfaces (SVIs).
23-3 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 23 Configuring HSRP Configur ing HSRP Figur e 23-1 T ypical HSRP Con figur ation Configuring HSRP These se ctions.
23-4 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 23 Configuring HSRP Configuring HSRP • Ether channel por t channe l in Layer 3 mod e: a port -channe l logica .
23-5 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 23 Configuring HSRP Configur ing HSRP Beginning in privilege d EXEC mode, follow these steps to cr eate or en able HSRP on a Layer 3 interface : Use the no standby [ gr oup-num ber ] ip [ i p-address ] interfac e conf igurat i on co mman d to di sable H SRP .
23-6 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 23 Configuring HSRP Configuring HSRP Configuring HSRP Group Attributes Although HSRP can ru n with no other conf.
23-7 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 23 Configuring HSRP Configur ing HSRP Beginnin g in pr ivi leged EX EC mod e, u se one o r more of the se st eps .
23-8 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 23 Configuring HSRP Configuring HSRP Use the no standby [ group-number ] priority pr ior ity [ preempt [ delay d.
23-9 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 23 Configuring HSRP Configur ing HSRP Use the no standby [ gr oup-n umbe r ] authen ticat ion string interface configur ation comman d to de l ete an auth entication str ing.
23-10 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 23 Configuring HSRP Displaying HSRP Configu rations Displaying HSRP Con figuratio ns From privil eged EXEC mo d.
C HAPTER 24-1 Catalyst 3550 Multilaye r Switch Software Configu ration Guide 78-11194-03 24 Configuring IP M ulticast R outing IP multica sting is a more e fficient way to use network r esources, especially f or bandwidth-inten sive services such as audi o and video .
24-2 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 24 Configuring IP Multicast Routing Cisco Implem entation o f IP Multica st Rout ing • Configur ing Basic D VM.
24-3 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 24 Configuring IP Mu lt ic as t Routing Cisco Implementation of IP Multicast Routing Understand ing IGMP T o parti c ipate in IP multicasting, mult icast hosts, routers, and multilay er switches must have IGMP operating.
24-4 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 24 Configuring IP Multicast Routing Cisco Implem entation o f IP Multica st Rout ing IGMP Version 2 IGMPv2 pr ovides enh ancements over IGMP v1. The query a nd member ship repor t messages are identical to IGMPv1 message with two e x ceptions.
24-5 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 24 Configuring IP Mu lt ic as t Routing Cisco Implementation of IP Multicast Routing group-spe cific qu ery . It responds w ith an IG MPv2 memb ershi p report to info rm Rout er 1 tha t a mem ber is still present.
24-6 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 24 Configuring IP Multicast Routing Cisco Implem entation o f IP Multica st Rout ing The simplest form of a mult.
24-7 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 24 Configuring IP Mu lt ic as t Routing Cisco Implementation of IP Multicast Routing PIM SM PIM SM uses shared tre es and SP T s to distribute multicast traf f ic to multicast receivers in the netwo rk.
24-8 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 24 Configuring IP Multicast Routing Cisco Implem entation o f IP Multica st Rout ing Prune messa ges are sen t up the distribut ion tree to prun e mul ticast gr oup traffic.
24-9 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 24 Configuring IP Mu lt ic as t Routing Cisco Implementation of IP Multicast Routing travel ho p-by-hop t hrougho ut the PIM doma in.
24-10 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 24 Configuring IP Multicast Routing Cisco Implem entation o f IP Multica st Rout ing Figu re 24- 6 RPF C heck P.
24-11 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 24 Configuring IP Mu lt ic as t Routing Cisco Implementation of IP Multicast Routing Understand ing DVMR P Dista.
24-12 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 24 Configuring IP Multicast Routing Cisco Implem entation o f IP Multica st Rout ing CGMP is a p rotocol u sed on Cisco r outers and multilayer switches conn ected to L ayer 2 Cataly st switche s to pe rfor m tasks simi la r to tho se pe rform ed by I GMP .
24-13 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 24 Configuring IP Mu lt ic as t Routing Configuring IP Multicast Routing Leaving a Group with CGMP When an IGM Pv2 host leaves a group , it can se nd an IGMP lea ve group message to the all-multic ast-routers group (224.
24-14 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 24 Configuring IP Multicast Routing Con fi gur ing IP Mu ltic ast R ou ti ng Multicast Routing Configuration Gu.
24-15 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 24 Configuring IP Mu lt ic as t Routing Configuring IP Multicast Routing Auto-RP and BS R Configuration Guidelin es There are two ap proac hes to usin g PIMv2.
24-16 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 24 Configuring IP Multicast Routing Con fi gur ing IP Mu ltic ast R ou ti ng T o disa ble multicasting , use the no ip multicas t-routing globa l c onf igur ati on comm a nd.
24-17 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 24 Configuring IP Mu lt ic as t Routing Configuring IP Multicast Routing Config ur ing a R end ez vous Po int If you ha ve configured PIM SM or PIM SM-DM , you must confi gure an RP for th e multicast g roup.
24-18 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 24 Configuring IP Multicast Routing Con fi gur ing IP Mu ltic ast R ou ti ng T o rem ove an RP ad dres s, us e th e no ip pim rp-address ip-addr ess [ access -list-numb er ] [ override ] global configu ratio n command .
24-19 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 24 Configuring IP Mu lt ic as t Routing Configuring IP Multicast Routing This section con tains this configurati.
24-20 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 24 Configuring IP Multicast Routing Con fi gur ing IP Mu ltic ast R ou ti ng T o rem ove the PIM devi ce config ure d as the candi date RP , use the no ip pim send-rp-announce global config urati on comm and.
24-21 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 24 Configuring IP Mu lt ic as t Routing Configuring IP Multicast Routing If all interfa ces are in spa rse mode, use a default -configure d RP to support the two well-k nown groups 224.
24-22 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 24 Configuring IP Multicast Routing Con fi gur ing IP Mu ltic ast R ou ti ng T o remove a f ilter on incoming R.
24-23 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 24 Configuring IP Mu lt ic as t Routing Configuring IP Multicast Routing Beginnin g in pr ivi leged EXE C m od e.
24-24 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 24 Configuring IP Multicast Routing Con fi gur ing IP Mu ltic ast R ou ti ng Defini ng the IP Multi cast Bou ndary Y ou d efi ne a m ult ica st bo und ar y to pr ev en t A uto- RP m es sag es fr om en t erin g the PIM d omai n.
24-25 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 24 Configuring IP Mu lt ic as t Routing Configuring IP Multicast Routing Configur ing Can dida te BSRs Y ou c an c on figu re on e or m ore c andi dat e BSRs .
24-26 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 24 Configuring IP Multicast Routing Con fi gur ing IP Mu ltic ast R ou ti ng Configur ing Can dida te RPs Y ou ca n con figu re one or m ore c andi dat e RPs.
24-27 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 24 Configuring IP Mu lt ic as t Routing Configuring IP Multicast Routing This examp le shows how to configure the multilay er switch to adver tise itself as a candidate RP to the BSR in its PIM domai n.
24-28 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 24 Configuring IP Multicast Routing Configur ing Advan ced PIM Fea tures Troubleshooting PIMv1 and PIMv2 Interoperability Problems When debu gging inte ropera bility pr oblems bet ween PIM v1 and PIMv2 , chec k these in th e order show n: 1.
24-29 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 24 Configuring IP Mu lt ic as t Routing Confi guring Ad vanced P IM Feat ures This proc ess descri bes the mov e from a shar ed tree to a sour ce tree: 1. A receiver join s a group; leaf Router C sends a join message toward the RP .
24-30 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 24 Configuring IP Multicast Routing Configur ing Advan ced PIM Fea tures Beginning in privileged EXEC mode, fol.
24-31 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 24 Configuring IP Mu lt ic as t Routing Configuring Optional IGMP Features By default , multic ast rout ers and multilaye r switche s send PI M router-query messag es ever y 30 seco nds.
24-32 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 24 Configuring IP Multicast Routing Con f i gur ing Op ti o n a l IG M P Fea tu res Changing the IGMP Version B.
24-33 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 24 Configuring IP Mu lt ic as t Routing Configuring Optional IGMP Features Y ou can de termine the quer y interval by enter ing the show ip igmp inter face interfac e-id privil eged EXEC co mmand.
24-34 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 24 Configuring IP Multicast Routing Con f i gur ing Op ti o n a l IG M P Fea tu res Configuring the Multilayer Switch as a Member of a Group Multilay er switches can be c o nfigured as member s of a m ulticast g roup.
24-35 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 24 Configuring IP Mu lt ic as t Routing Configuring Optional IGMP Features Controlling Access to IP Multicast Groups The multilayer switch sends IGMP host-query messa ges to determine which multicast groups have members on attach ed local networks .
24-36 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 24 Configuring IP Multicast Routing Con f i gur ing Op ti o n a l IG M P Fea tu res Modifying th e IGMP Host-Qu.
24-37 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 24 Configuring IP Mu lt ic as t Routing Configuring Optional Multicast Routing Features Beginning in priv ileged.
24-38 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 24 Configuring IP Multicast Routing Configur ing Optiona l Multic as t Routing Feat ures Enabling C GMP Serv er Support The multilayer switch serves as a CGMP server for devices that do not support IGMP snooping but have CGMP client funct ionality .
24-39 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 24 Configuring IP Mu lt ic as t Routing Configuring Optional Multicast Routing Features Configuring s dr Listene.
24-40 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 24 Configuring IP Multicast Routing Configur ing Optiona l Multic as t Routing Feat ures T o retur n to the default setting, use the no ip s dr ca che-t im eout global con fi gurat ion co mma nd.
24-41 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 24 Configuring IP Mu lt ic as t Routing Configuring Optional Multicast Routing Features multicas t packets with an init ial TTL value set to 99.
24-42 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 24 Configuring IP Multicast Routing Configur ing Optiona l Multic as t Routing Feat ures Configuring an IP Mult.
24-43 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 24 Configuring IP Mu lt ic as t Routing Configuring Basic DVMRP Interoperability Features Beginnin g in privil e.
24-44 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 24 Configuring IP Multicast Routing Configur ing Basi c D VMRP Interope rabilit y F eat ures Configuring DVMRP .
24-45 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 24 Configuring IP Mu lt ic as t Routing Configuring Basic DVMRP Interoperability Features Beginnin g in priv ile.
24-46 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 24 Configuring IP Multicast Routing Configur ing Basi c D VMRP Interope rabilit y F eat ures This example sh ows how to configure DVMRP interoper ability when t he PIM device and th e DVMRP route r are on the sa me network s egment .
24-47 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 24 Configuring IP Mu lt ic as t Routing Configuring Basic DVMRP Interoperability Features Beginnin g in pr ivi l.
24-48 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 24 Configuring IP Multicast Routing Configur ing Basi c D VMRP Interope rabilit y F eat ures T o di sable the filter , use the no ip dvmrp accept-filter access-list-numbe r [ dist ance ] neighbor-list access-list -numbe r interfa ce configura tion comman d.
24-49 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 24 Configuring IP Mu lt ic as t Routing Configuring Basic DVMRP Interoperability Features T o p revent the defa ult route adv ertisemen t, use the no ip dvmrp default-information { originate | only } interfac e config uration comm and.
24-50 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 24 Configuring IP Multicast Routing Configur ing Advan ced DVM RP Interope rability Fe atures Configuring Advan.
24-51 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 24 Configuring IP Mu lt ic as t Routing Configuring Advanced DVMRP Interoperability Features Rejectin g a DVM RP Nonp runing Ne ighbor By default, Cisco d evices acc ept al l DVMRP neig hbors as peer s, re gardless of thei r DVMRP capabi lity .
24-52 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 24 Configuring IP Multicast Routing Configur ing Advan ced DVM RP Interope rability Fe atures Figur e 24-14 Rou.
24-53 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 24 Configuring IP Mu lt ic as t Routing Configuring Advanced DVMRP Interoperability Features Controlling Route Exchanges This se cti on desc ribe s how to t un e th e Ci sco d ev ice adv er tise ment s of DV MRP ro ute s.
24-54 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 24 Configuring IP Multicast Routing Configur ing Advan ced DVM RP Interope rability Fe atures Changing the DVMR P Route Threshold By default , 10,000 DV MRP routes c an be rece ived per int erface wit hin a 1-mi nute interv al.
24-55 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 24 Configuring IP Mu lt ic as t Routing Configuring Advanced DVMRP Interoperability Features Figu re 24- 1 5 Onl.
24-56 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 24 Configuring IP Multicast Routing Configur ing Advan ced DVM RP Interope rability Fe atures Disabling DVMRP Autosummarization By default, the Cisco I OS software a utomatically performs some le v el of DV MRP summarizatio n.
24-57 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 24 Configuring IP Mu lt ic as t Routing Monitoring and Maintaining IP Multicast Routing Beginning in privileged .
24-58 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 24 Configuring IP Multicast Routing Mon i tor in g an d Mai nt a in in g IP M ultic as t Rou ting Clearing Cac hes, Ta bles, and D atabas es Y ou ca n remove all co nten ts of a par ticula r cache , tabl e, or dat abase.
24-59 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 24 Configuring IP Mu lt ic as t Routing Monitoring and Maintaining IP Multicast Routing Monitoring IP Multicast .
24-60 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 24 Configuring IP Multicast Routing Mon i tor in g an d Mai nt a in in g IP M ultic as t Rou ting.
C HAPTER 25-1 Catalyst 3550 Multilaye r Switch Software Configu ration Guide 78-11194-03 25 Configuring MSDP This chapte r describes how to configure the Multicast Source Disc overy Protocol (MSDP) on your multilaye r switch. T he MSDP c onnects m ultiple Proto col-Indep endent Multic ast sparse-mode (PIM -SM) domai ns.
25-2 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chap ter 25 Config uring MS DP Unders tan din g MSDP The purpos e of thi s topolog y is to hav e domain s discov er mult icast sourc es in othe r domains .
25-3 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 25 Configuring MSD P Understandi ng MSDP Figur e 25-1 MSDP Running Be tween RP P eers MSDP Benefits MSDP has th ese bene fits: • It breaks up the shared multicast distribu tion tree.
25-4 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chap ter 25 Config uring MS DP Conf iguring M SDP Configuring MSDP This se cti on desc ribe s how t o c onf igur e MSDP .
25-5 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 25 Configuring MSD P Configuring MSDP Figur e 2 5-2 Def ault MSDP P eer Netw or k Beginning in privil eged EXEC mode, follow these steps to specify a default MSDP peer : Si ISP A PIM domain ISP C PIM domain SA Router A Multila yer Switch B 10.
25-6 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chap ter 25 Config uring MS DP Conf iguring M SDP T o remove the de fault peer , use the no ip msdp def a ult-peer globa l c onfi gura tion c om mand. This ex ampl e shows a pa rtia l config urat ion of Ro uter A and Rout er C in Figure 25- 2 .
25-7 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 25 Configuring MSD P Configuring MSDP Begin ning in privil eged EXEC mode, fo llow these steps to en able the cac.
25-8 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chap ter 25 Config uring MS DP Conf iguring M SDP Requestin g Source Info rmation fro m an MSDP Peer Local RPs can send SA req ues ts a nd get i mm edi ate r esp onses f or al l ac ti ve so urce s f or a given gro up.
25-9 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 25 Configuring MSD P Configuring MSDP Redistributing Sources SA messages ar e originat ed on RPs to whic h sources hav e register ed. By defa ult, an y source that regis ters with an RP is adverti s ed.
25-10 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chap ter 25 Config uring MS DP Conf iguring M SDP T o remove the filter , use th e no ip msdp r edistribute global con figura tion com mand .
25-11 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 25 Configuring MSD P Configuring MSDP Filtering Source- Active R equest Messages By default, only multilay er switches that are caching SA information can respond to SA requests.
25-12 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chap ter 25 Config uring MS DP Conf iguring M SDP Controlling Source Information that Your Switch Forwards By default, the multilayer switch f orwards all SA messages it rece ives to all its MSDP pee rs.
25-13 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 25 Configuring MSD P Configuring MSDP T o remove the filter , use th e no ip msdp sa-filt er out { ip-a dd ress | nam e } [ list access-list-numbe r ] [ ro ut e -m a p map- tag ] glo bal co nfigura tion co mman d.
25-14 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chap ter 25 Config uring MS DP Conf iguring M SDP Using TTL to Limit the Multicast Data Sent in SA Messages Y ou can use a T T L value t o cont rol what data is encapsulated in the fir st SA message f or every source.
25-15 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 25 Configuring MSD P Configuring MSDP Beginning in privileged EXEC mode, follo w these steps to apply a filter :.
25-16 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chap ter 25 Config uring MS DP Conf iguring M SDP Config ur ing an MS DP Mes h Gr ou p An MSD P mesh group is a grou p of M SDP spe akers tha t have full y meshed MSDP conne ctivity among one an other .
25-17 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 25 Configuring MSD P Configuring MSDP Beginn ing in privileged EXEC mode, fo llow these s teps to shut d own a peer: T o bring the p eer back up , use t he no ip msdp shutdown { peer-nam e | peer address } global config urati on comm and.
25-18 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chap ter 25 Config uring MS DP Conf iguring M SDP Note that t he ip msdp origina tor -id global config uration c ommand also identifi es an inte rface typ e and number t o be used as the RP addre ss.
25-19 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 25 Configuring MSD P Monitoring and Maintaining MSDP Monitoring and Maintaining MSDP T o monitor MS DP SA m essa.
25-20 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chap ter 25 Config uring MS DP Monito rin g and Maint ain ing MSDP.
C HAPTER 26-1 Catalyst 3550 Multilaye r Switch Software Configu ration Guide 78-11194-03 26 Configuring Fallbac k Bridging This c hapt er d escri b es how to co nfi gure fa llb ack bri dging on y our sw it ch.
26-2 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 26 Configuring Fallback Bridging Unders tan ding Fall ba ck Bridgi ng acts l ike a por t on a r oute r, but it i s n ot c onn ect e d to a ro ut er .
26-3 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 26 Configuring Fal lback Bri dg ing Configuring Fallback Bridging Configuring Fall back Bridging This section descri bes how to conf igur e fallb ack br idgi ng on your switc h.
26-4 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 26 Configuring Fallback Bridging Configur ing Fallback Bridg ing Creating a Bridg e Group T o configur e fal lba ck br idgi ng for a se t of SVIs or ro ute d port s, t hes e i nte rfac es mu st b e assi g ned t o bridge group s.
26-5 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 26 Configuring Fal lback Bri dg ing Configuring Fallback Bridging This exa m ple sh ows ho w to c rea te br idge .
26-6 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 26 Configuring Fallback Bridging Configur ing Fallback Bridg ing Configuring the Bridge Table Aging Time A switch forw ards, fl oods, or dro ps packet s based on the bri dge tab le.
26-7 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 26 Configuring Fal lback Bri dg ing Configuring Fallback Bridging Beginning in privileged EXEC mode, follo w thes.
26-8 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 26 Configuring Fallback Bridging Configur ing Fallback Bridg ing Changing the Switch Prio rity Y ou can globally.
26-9 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 26 Configuring Fal lback Bri dg ing Configuring Fallback Bridging No no form of this command exists. T o return to the default settin g, use the bridge-gr oup bridge-group priority nu mber interfac e c onf igur ati on comm an d.
26-10 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 26 Configuring Fallback Bridging Configur ing Fallback Bridg ing Adjust ing BPDU Interv als Y ou can adjust BPD.
26-11 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 26 Configuring Fal lback Bri dg ing Configuring Fallback Bridging T o retur n to the default setting, use the no bridge bridge-group forw ard-t ime seconds globa l config urati on comm and.
26-12 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 26 Configuring Fallback Bridging Monito rin g and Maint aining th e Network Disabling the Spanning Tree on an I.
C HAPTER 27-1 Catalyst 3550 Multilaye r Switch Software Configu ration Guide 78-11194-03 27 Troubleshooting This chapte r describes how to identify and resolve softwar e problems related to the IOS software.
27-2 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 27 Trouble shooting Using Re covery Procedu res Recovering from Corru pted Softw are Switch so ftw are c an be corr upt ed du ring an upg ra de, by dow nlo adin g the w rong fi le to t he sw itch, an d by deletin g the ima ge file.
27-3 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 27 Troublesho oting Using Reco very Procedu res Recovering from a Lost or Fo rgotten Pass word The default config.
27-4 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 27 Trouble shooting Using Re covery Procedu res Step 2 If you had set the co nsole port speed to an ything othe r than 9600 , it has been re set to that par ticula r speed.
27-5 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 27 Troublesho oting Using Reco very Procedu res Step 12 Retu rn to privi leged EX EC mode : Switch (config)# exit.
27-6 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 27 Trouble shooting Using Re covery Procedu res Step 3 Dis play the cont ents of Flash memo ry: switch: dir flash: The switch file system is displayed: Directory of flash: 13 drwx 192 Mar 01 1993 22:30:48 c3550-i5q3l2-mz-121-0.
27-7 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 27 Troublesho oting Using Reco very Procedu res Recovering from a Command Switc h Failure This se cti on de sc ribes how to re cove r fr om a fail ed c om mand sw itch.
27-8 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 27 Trouble shooting Using Re covery Procedu res Step 9 Use the setu p prog ram to config ure th e swit ch I P inform ation . Thi s pro gram pro mp ts you fo r IP a ddres s inform ation and pa ssword s.
27-9 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 27 Troublesho oting Using Reco very Procedu res Replacing a Failed Command Switch with Another Sw itch T o re pla.
27-10 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 27 Trouble shooting Preventing Autone gotiati on M ismatche s Step 10 When pr omp ted, assign a n ame to t he cl us ter , and pr ess Return . The clu ster name can be 1 to 31 al phan umeric cha ract ers, dashe s, or under score s.
27-11 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 27 Troublesho oting Diagnosing Connectivit y Problems Diagnosing Co nnectivity Prob lems This se cti on de scri .
27-12 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 27 Trouble shooting Diagno sing Connec tivity Prob lems This e xample sh ows h ow t o pi ng a n IP host: Switch# ping 172.20.52.3 Type escape sequence to abort. Sending 5, 100-byte ICMP Echoes to 172.
27-13 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 27 Troublesho oting Diagnosing Connectivit y Problems T o det er mine when a datagram reac h es its destinat io n, trace route sets the UD P destination p ort number in the datagram to a very lar ge value that the destina tion host is unlikely to be using.
27-14 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 27 Trouble shooting Using D ebug Command s T o ter minate a trace in pr ogress, enter th e escape s equence ( Ctrl-^ X by defa ult).
27-15 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 27 Troublesho oting Using the sho w forward C ommand Enabling All-Sy stem Diag nostics Beginnin g in pr ivi lege.
27-16 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 27 Trouble shooting Using the s how f orward Com m an d This is a n ex am ple of th e ou t put f ro m t h e sho.
27-17 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Chapter 27 Troublesho oting Usin g th e cr a shi n fo Fi le Using the crashinfo File The cr as hi nfo file save s infor ma tion t hat hel ps C isco tec hni cal su pport r epre sen tati ves to debug problem s that c aused the IOS im age to fail ( c rash).
27-18 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Chapter 27 Trouble shooting Using t he c rashinfo File.
A-1 Catalyst 3550 Multilay e r Switch Software Configuration Guide 78-11194-03 APPENDIX A Supported MIBs This app endix lists the supporte d manage ment info rmation ba se (MIBs) for this rel ease.
A- 2 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Appendi x A Suppor ted MIBs Using FTP t o Acces s the MIB Fi le s • CISCO-ME MOR Y -POOL-MIB • CISCO-R T TMON-M IB (.
B-1 Catalyst 3550 Multilay e r Switch Software Configuration Guide 78-11194-03 APPENDIX B Working with the IOS File System, Configuration Files, and Software Imag es This a ppend ix desc ribe s how to m an ipulat e th e Flash fi le syste m, how to copy c onf igur ation fi le s, an d how to archi ve (up load and do wnload ) softwa re imag es.
B-2 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Appendix B Working with the IOS File System, Configuration Files, an d S oftware Imag es Working w it h t he F lash File .
B-3 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Append ix B Working with the IOS Fi le S ys te m, Configu rat ion Files, and Software Im ag es Wo rking with the Flash Fil.
B-4 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Appendix B Working with the IOS File System, Configuration Files, an d S oftware Imag es Working w it h t he F lash File .
B-5 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Append ix B Working with the IOS Fi le S ys te m, Configu rat ion Files, and Software Im ag es Wo rking with the Flash File System Some inval id combi nations of sour ce an d destinat ion exi st.
B-6 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Appendix B Working with the IOS File System, Configuration Files, an d S oftware Imag es Working w it h t he F lash File .
B-7 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Append ix B Working with the IOS Fi le S ys te m, Configu rat ion Files, and Software Im ag es Wo rking with the Flash Fil.
B-8 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Appendix B Working with the IOS File System, Configuration Files, an d S oftware Imag es Working w ith Con figuration Fil.
B-9 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Append ix B Working with the IOS Fi le S ys te m, Configu rat ion Files, and Software Im ag es W orking with Configuration.
B-10 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Appendix B Working with the IOS File System, Configuration Files, an d S oftware Imag es Working w ith Con figuration Fi.
B-11 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Append ix B Working with the IOS Fi le S ys te m, Configu rat ion Files, and Software Im ag es W orking with Configuratio.
B-12 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Appendix B Working with the IOS File System, Configuration Files, an d S oftware Imag es Working w ith Con figuration Fi.
B-13 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Append ix B Working with the IOS Fi le S ys te m, Configu rat ion Files, and Software Im ag es W orking with Configuratio.
B-14 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Appendix B Working with the IOS File System, Configuration Files, an d S oftware Imag es Working w ith Con figuration Fi.
B-15 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Append ix B Working with the IOS Fi le S ys te m, Configu rat ion Files, and Software Im ag es W orking with Configuratio.
B-16 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Appendix B Working with the IOS File System, Configuration Files, an d S oftware Imag es Working w ith Con figuration Fi.
B-17 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Append ix B Working with the IOS Fi le S ys te m, Configu rat ion Files, and Software Im ag es W orking with Configuration Files • When you upload a file to the RCP server , it must be properly configured to accept the RCP write request fro m the user on the switch.
B-18 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Appendix B Working with the IOS File System, Configuration Files, an d S oftware Imag es Working w ith Con figuration Files This exampl e shows how to speci fy a remot e usern ame of netadmin1 .
B-19 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Append ix B Working with the IOS Fi le S ys te m, Configu rat ion Files, and Software Im ag es Working with Software Imag.
B-20 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Appendix B Working with the IOS File System, Configuration Files, an d S oftware Imag es Working wi th Software Imag es This section includes this informa tion: • Imag e Locat ion on the Switch , pag e B-20 • tar File Format of Imag es on a Serve r or Cisco.
B-21 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Append ix B Working with the IOS Fi le S ys te m, Configu rat ion Files, and Software Im ag es Working with Software Images Copying Imag e Files By Us ing TF TP Y ou can down load a switch image from a TFTP ser ver or upload the image from the switch to a TFTP server .
B-22 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Appendix B Working with the IOS File System, Configuration Files, an d S oftware Imag es Working wi th Software Imag es .
B-23 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Append ix B Working with the IOS Fi le S ys te m, Configu rat ion Files, and Software Im ag es Working with Software Imag.
B-24 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Appendix B Working with the IOS File System, Configuration Files, an d S oftware Imag es Working wi th Software Imag es Uploading an Image File By Using TFTP Y ou can u pload a n image f rom the swit ch to a TFTP server .
B-25 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Append ix B Working with the IOS Fi le S ys te m, Configu rat ion Files, and Software Im ag es Working with Software Imag.
B-26 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Appendix B Working with the IOS File System, Configuration Files, an d S oftware Imag es Working wi th Software Imag es .
B-27 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Append ix B Working with the IOS Fi le S ys te m, Configu rat ion Files, and Software Im ag es Working with Software Imag.
B-28 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Appendix B Working with the IOS File System, Configuration Files, an d S oftware Imag es Working wi th Software Imag es The algo rithm ins talls the downloaded image onto th e system board Flash d evice (f lash:).
B-29 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Append ix B Working with the IOS Fi le S ys te m, Configu rat ion Files, and Software Im ag es Working with Software Imag.
B-30 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Appendix B Working with the IOS File System, Configuration Files, an d S oftware Imag es Working wi th Software Imag es For the RCP copy re qu est t o exec ute succ essfu lly , an acco unt mu st be de fi ne d on the netwo rk s er ver fo r the remote username.
B-31 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Append ix B Working with the IOS Fi le S ys te m, Configu rat ion Files, and Software Im ag es Working with Software Imag.
B-32 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Appendix B Working with the IOS File System, Configuration Files, an d S oftware Imag es Working wi th Software Imag es If you spe cify t he /leave-old-sw , the existing files are not remov ed.
B-33 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Append ix B Working with the IOS Fi le S ys te m, Configu rat ion Files, and Software Im ag es Working with Software Imag.
B-34 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Appendix B Working with the IOS File System, Configuration Files, an d S oftware Imag es Working wi th Software Imag es.
C-1 Catalyst 3550 Multilay e r Switch Software Configuration Guide 78-11194-03 APPENDIX C Unsupported CLI Commands This a ppend ix l ist s the unsu ppor ted com ma nd-l ine i nter face (CL I) c omma nds tha t are disp laye d w hen you en ter the questi on mark ( ?) at t he swit ch prompt .
C-2 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Appendix C Unsupported C LI Comman ds FallBack Bridg ing FallBack Bridging Unsupporte d Privileged E XEC Commands clear b.
C-3 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Append ix C Unsupported CL I Comm ands HSRP bridge-gr oup brid ge-gr oup input-pattern-list access-list- number bridge-gr .
C-4 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Appendix C Unsupported C LI Comman ds Interface Co nfiguration Com m an ds Interface Config uration Command s switchport br o adcast level swit c h po rt m u lt ic a st level switchpor t unicast level Note These comm ands wer e repl aced in IOS re lease 12 .
C-5 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Append ix C Unsupported CL I Comm ands IP Unicast Routing Unsupported Interface Configuration Commands frame-relay ip rtp .
C-6 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Appendix C Unsupported C LI Comman ds IP Unicas t Rou ti ng ip ref lexive-list ip vrf route r bgp rou t e r e g p router .
C-7 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-11194-03 Append ix C Unsupported CL I Comm ands MSDP MSDP Unsupporte d Privileged E XEC Co mmands show access-expression show excep.
C-8 Catalyst 3550 Multila yer Switch Software Conf iguration Guide 78-11194-03 Appendix C Unsupported C LI Comman ds RADIUS.
IN- 1 Catalyst 3550 Multilayer Switch Software C onfigurati on Guide 78-11194-03 INDEX Numerics 802.1 Q and trunk ports 8-3 config urati on limitat ions 9-24 enca psul ation 9-22, 9-24 nati ve VLAN for u ntagge d traffi c 9-29 802.1 Q trunk mode 3-9 802.
Index IN-2 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-1119 4-03 ACLs (continued) host keywor d 19-12 IP applyi ng t o int erfa ce 19-18 crea ting 19-6 fragme nts a nd Q oS guide .
Index IN- 3 Catalyst 3550 Multilayer Switch Software C onfigurati on Guide 78-11194-03 aggreg ate policing 1-4 aging, ac celerating 10-10 aging tim e acceler ated for STP 10-10, 10-29 bridge table for.
Index IN-4 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-1119 4-03 banners config uring login 6-51 mess age- of-t he-da y login 6-50 default conf igur ati on 6- 49 when disp laye d .
Index IN- 5 Catalyst 3550 Multilayer Switch Software C onfigurati on Guide 78-11194-03 Cisco Disc overy Pr otocol See CDP Cisco Exp ress For war ding See CEF Cisco Group Man agement Protoco l See CGMP.
Index IN-6 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-1119 4-03 CMS (continued) displaying system message s 3-19 error ch ecking 3-32 featu res 3-2 Front Panel images 3-6 Front P.
Index IN- 7 Catalyst 3550 Multilayer Switch Software C onfigurati on Guide 78-11194-03 config urati on files clearin g the startup co nfigura tion B-19 creating using a text editor B- 10 default n ame.
Index IN-8 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-1119 4-03 default configuration (c ontinued) EtherC hannel 21-7 fallback br idging 26-3 HSRP 23-3 IGMP 24-31 IGMP f ilt eri .
Index IN- 9 Catalyst 3550 Multilayer Switch Software C onfigurati on Guide 78-11194-03 Disqual ificati on Code option 3-25 Distance Ve ctor Multicast Routin g Protocol See DVMRP distan ce-v ec tor pr .
Index IN- 10 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-1119 4-03 DVMRP (continued) support fo r 1-5 tunnel s config uring 24-46 displaying ne ighbor i nform ation 24-49 dynami c.
Index IN-11 Catalyst 3550 Multilayer Switch Software C onfigurati on Guide 78-11194-03 EtherChannel (cont inued) Layer 3 int erface 22-3 load balancin g 21-5, 21-13 logical int erfaces, described 21-2.
Index IN- 12 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-1119 4-03 fallback bridging (continued) STP disabli ng on an interf ace 26-12 forwar d-dela y inter val 26-10 hello BPDU i.
Index IN-13 Catalyst 3550 Multilayer Switch Software C onfigurati on Guide 78-11194-03 FTP (continued) image fi les deleting old i mage B- 28 dow nloa ding B-26 prep aring the server B-25 uploadin g B.
Index IN- 14 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-1119 4-03 I ICMP redirec t messages 22-15 support fo r 1-5 time exce eded messages 27-12 tracer oute an d 27-12 unreach ab.
Index IN-15 Catalyst 3550 Multilayer Switch Software C onfigurati on Guide 78-11194-03 IGMP snooping (c ontinued) Immedi ate Leave 11-4 method 11-6 monitoring 11- 9 support fo r 1-2 VLAN c onfi gur at.
Index IN- 16 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-1119 4-03 IP addresses candi dat e o r me mb er 5-3, 5-15 classes of 22-5 clust er access 5-2 comm an d sw it ch 5-2, 5-13.
Index IN-17 Catalyst 3550 Multilayer Switch Software C onfigurati on Guide 78-11194-03 IP multicast routing ( continued) MBO NE deleting sdr cache en tries 24-58 describe d 24-39 displaying sdr ca che.
Index IN- 18 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-1119 4-03 IP unicast routing (continued) protoc ols distan ce-v ect or 22-2 dynam ic 22-2 link-state 22-2 proxy ARP 22-10 .
Index IN-19 Catalyst 3550 Multilayer Switch Software C onfigurati on Guide 78-11194-03 M MAC a ddr esses aging tim e 6-53 and VLAN association 6-52 building the address tab le 6-52 default conf igur a.
Index IN- 20 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-1119 4-03 mirror in g tr af fic fo r an al ys is 15-1 misma tches, a utonegotiat ion 27-10 Mod e butt on 3-8 modes acces s.
Index IN-21 Catalyst 3550 Multilayer Switch Software C onfigurati on Guide 78-11194-03 MSDP (continued) source-ac tive messa ges caching 25-6 clearin g cache entries 25-19 defined 25-2 filtering f rom.
Index IN- 22 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-1119 4-03 NTP (continued) restr icting acc ess creatin g an access g roup 6-39 disabling NT P services pe r interfac e 6-4.
Index IN-23 Catalyst 3550 Multilayer Switch Software C onfigurati on Guide 78-11194-03 PIM default conf igur ati on 24- 13 dense m ode (S,G) nota tion 24-6 graft message s 24-6 overvi ew 24-5 pruning .
Index IN- 24 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-1119 4-03 port -base d authen tica tion (cont inued ) EAP-response/iden tity frame 7-3 enab lin g 802.
Index IN-25 Catalyst 3550 Multilayer Switch Software C onfigurati on Guide 78-11194-03 pr otect ed p orts 1-3, 12-5 protoc ol-depe ndent mo dules, EI GRP 22-47 Protocol-In dependent Multicast Proto co.
Index IN- 26 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-1119 4-03 QoS (continued) mappin g tabl es CoS-to-DSCP 20-39 CoS-to-egr ess-queue 20-45 displaying 20-56 DSCP-to-CoS 20-42.
Index IN-27 Catalyst 3550 Multilayer Switch Software C onfigurati on Guide 78-11194-03 RADIUS (cont inued) config uring accoun ting 6-27 authenti cation 6-23 author izat ion 6-26 communi cation , glob.
Index IN- 28 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-1119 4-03 RFC (continued) 1253, OSPF 22-35 1305, NTP 6-32 1587, NSSAs 22 -35 1757, RMO N 16-2 1901, SNMPv 2C 18-2 1902 to .
Index IN-29 Catalyst 3550 Multilayer Switch Software C onfigurati on Guide 78-11194-03 show inte rfaces comma nd 8-15, 8-17 show running -conf ig command displaying A CLs 19- 19, 19-30, 19-32 interfac.
Index IN- 30 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-1119 4-03 standby comm a nd sw itch config uring 5-22 conside rations 5-14 defined 5-2 priority 5-12 requir ements 5-3 vir.
Index IN-31 Catalyst 3550 Multilayer Switch Software C onfigurati on Guide 78-11194-03 STP (continued) EtherC hanne l g ua rd describe d 10-20 enab lin g 10-37 exten ded s y st em I D affec ts on ro o.
Index IN- 32 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-1119 4-03 switch pr io rity, ST P 10-28 switch software features 1-1 switch v irtual in terface See SVI syslog See system .
Index IN-33 Catalyst 3550 Multilayer Switch Software C onfigurati on Guide 78-11194-03 tail drop describe d 20-13 support fo r 1-4 tar fi les crea ting B-6 displaying the c ontent s of B-6 extractin g B-7 image fi le format B-2 0 techni cal assist ance Cisco.
Index IN- 34 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-1119 4-03 troublesh ooting connec tiv ity probl ems 27-11 detectin g Ether Channe l m isco nfi gu ratio ns 10-37 unidirect.
Index IN-35 Catalyst 3550 Multilayer Switch Software C onfigurati on Guide 78-11194-03 uploadin g config urati on files prep aring B-10, B-13, B-16 reasons for B-8 using FTP B-15 using RC P B-18 using.
Index IN- 36 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-1119 4-03 VLANs (con tinued) native, c on figur ing 9-29 number supp orted 1-3, 9-2 port m embe rship mode s 9-3 static-access ports 9-18, 9-19 STP and 802.
Index IN-37 Catalyst 3550 Multilayer Switch Software C onfigurati on Guide 78-11194-03 VTP (continued) version 2 config urati on guidelin es 9-9 disabling 9-12 enab lin g 9-12 overvi ew 9-6 VLAN para .
Index IN- 38 Catalyst 3550 Multilayer Switch Software Conf iguration Guide 78-1119 4-03.
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