Gebruiksaanwijzing /service van het product 2950 van de fabrikant Cisco Systems
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iii Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-11380-05 CONTENTS Preface xx iii Audienc e xxiii Pur pose xx iii Organi zation xx iv Conv enti ons xxvi Rela te d Publi cation s xxvi.
Cont ent s iv Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 CHAPTER 2 Using t he Command -Line I nterface 2-1 IOS Command Mode s 2-1 Gettin g Help 2-3 Abbrevi ating Comma nds.
Content s v Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-11380-05 Topolo gy View Po pup Menus 3-21 Link Popu p Me nu 3-21 Device Po pup Menus 3-22 Inter action Mode s 3-23 Guide Mo d.
Cont ent s vi Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Manua lly As sign ing IP Infor matio n 4-10 Checki ng and Sav in g the Runn i ng Configu ration 4-10 CHAPTER 5 Con.
Content s vii Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-11380-05 HSRP and Sta ndby Comman d Swi tches 6-13 Virtua l IP Addr es s es 6-14 Other Consider ations for Clust er Stan db.
Cont ent s viii Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Config urin g TACAC S+ 7-11 Defaul t TACACS+ Co nfi gurati on 7-12 Identi fying t he TACACS+ Server Host and Set.
Content s ix Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-11380-05 Config urin g a Sys tem Name and Prompt 7-46 Defaul t Syste m Name and Prompt Co nfig ura tion 7-46 Config urin g a.
Cont ent s x Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Settin g t he S witch -to -Cli ent Fr ame -Re trans mis sion Num ber 8-13 Enab ling Mul tip le Host s 8-13 Resett ing th e 802 .1X Conf igurat ion to the Defaul t Values 8-14 Displa ying 802.
Content s xi Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-11380-05 Spannin g-Tr ee Interf ace State s 10-5 Blocki ng Stat e 10-7 List ening Sta te 10-7 Learni ng Stat e 10-7 Forw ardi ng S tat e 10-7 Disabl ed State 10-8 Spannin g-Tr ee Add ress Man age ment 10-8 STP and IE EE 802.
Cont ent s xii Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Hop Count 11-10 Boundar y Ports 11-10 Intero per abili ty wi th 8 02.
Content s xiii Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-11380-05 Enabli ng Uplink Fast f or Use with Re dundan t Li nks 12-17 Enabli ng C ross-St ack Up linkFa st 12 -18 Enabli n.
Cont ent s xiv Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Load S harin g Using STP 13-21 Load S harin g Using STP Port Prior ities 13-21 Load S harin g Using STP Path Co s.
Content s xv Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-11380-05 Disabl ing VTP (VT P Trans par ent Mode ) 14-12 Enabli ng V TP Versi on 2 14-13 Enabli ng V TP Pruni ng 14-14 Addin.
Cont ent s xvi Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Displa ying MVR Inf ormation 16-18 Config urin g IGMP Fil te ring 16-19 Defaul t IGMP Fil terin g Confi g ur atio.
Content s xvii Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-11380-05 CHAPTER 19 Configur ing C DP 19-1 Underst anding CDP 19-1 Config urin g CDP 19-2 Defaul t CDP Conf ig urati on 19.
Cont ent s xviii Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 CHAPTER 21 Configur ing R MON 21-1 Underst anding RMON 21-1 Config urin g RMON 21-2 Defaul t RMON Configur atio.
Content s xix Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-11380-05 Config urin g SNMP Groups and Us ers 23-8 Config urin g SNMP Notif icati ons 23-1 0 Setti ng the Age n t Contact a.
Cont ent s xx Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 CHAPTER 25 Configur ing Q oS 25-1 Underst anding QoS 25-2 Basic QoS Model 25-3 Classi ficati on 25-4 Classi ficati.
Content s xxi Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-11380-05 CHAPTER 26 Configur ing E therChannel s 26-1 Underst anding Et herCh ann els 26-1 Underst andi ng Po rt-Ch annel I.
Cont ent s xxii Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05.
xxiii Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-11380-05 Preface Audience The Cataly st 2 950 Desktop Sw itch Sof tware Configuration Gui de is for t he n etwor k ma na ger responsible for conf igur ing the Catalyst 2950 switches, hereaf ter referred to as the switches .
xxiv Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Preface Organizati on • Cluster Ma nageme nt Suite (CM S) info rmation — This guide provides an overview of the CMS web-base d, switc h ma nage ment inter face.
xxv Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-11380-05 Pre face Organization Chapter 7, “ Administeri ng the Switc h, ” describes how to perform one-time operati ons to administ er your switch.
xxvi Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Preface Conv ent ions Chapter 22, “ Conf i gurin g Syst em Mes sage Lo gging, ” describes how to configure system me ssage logging.
xxvii Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-11380-05 Pre face Related Publ icati ons Ti p Means the followin g will help yo u solve a pr oblem . The tips informat ion might not be trouble shootin g or even an ac tio n, but cou ld be use ful info rma ti on.
xxvii i Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Preface Obtain in g Technical Assis ta nce Documenta tion C D-ROM Cisco documentati on and additio nal literature are a v ailable in a Cisco Documentation CD-R OM packag e, w hich is shi pped with you r prod uct.
xxix Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-11380-05 Pre face Ob taining Technical Assistance Cisco.com Cisco.com is t he foundation of a suite of inter acti ve, network ed ser.
xxx Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Preface Obtain in g Technical Assis ta nce If you are a Ci sco. com registered use r, and you cannot resol ve your tech nica l issu es by using the C isco T AC W eb Site, you can open a ca se online by using the T AC Case Op en tool at t his URL: http://www .
C HAPTER 1-1 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 1 Overview This chapter pro vides these topics ab out the Catalyst 2950 switch software: • Feat ures , page 1- 1 .
1-2 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Ch ap ter 1 Ov er vi ew Feature s Per for ma nce • Autosensing of spee d on the 10/ 100 and 1 0/100 / 1000 ports a nd auto negotiation o f du plex mode o n the 10 /100 port s f or op tim izing ba ndwid th • IEEE 8 02.
1-3 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 1 Overview Features • In-band man agement access throug h up to 16 simultaneous T elnet connec tions for multiple .
1-4 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Ch ap ter 1 Ov er vi ew Feature s • The swit ch supp orts up t o 4094 VLA N IDs to all o w se rvice pro v ider netw orks t o suppor t the numb er of VLANs allo wed by th e IEEE 802.
1-5 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 1 Overview Manageme nt Options • Policing – T raffic-policing p oli cies o n the switc h por t for a ll ocati ng.
1-6 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Ch ap ter 1 Ov er vi ew Managem e nt Optio ns Manageme nt Interface Optio ns Y o u can co nfigure and monit or individual sw.
1-7 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 1 Overview Network Configuration Examples • Apply a ctions from CMS to multipl e ports an d multiple switches at the same time to a v oid re-ente ring the same comma nds for eac h individual port or switch.
1-8 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Ch ap ter 1 Ov er vi ew Netwo rk Conf igurati on Ex amples Bandwidt h alone is not the only c onsiderat ion when d esigning you r network.
1-9 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 1 Overview Network Configuration Examples Y o u can cr eate bac kup paths by using Fast Ethernet , Gigab it, Fast EtherCha nnel, or Gigabit EtherCha nnel li nks.
1-10 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Ch ap ter 1 Ov er vi ew Netwo rk Conf igurati on Ex amples Figur e 1 -1 Example Configur ations Small to Medium-Sized Network Configuration Figure 1-2 sh ows a con figurat ion for a n etwork th at has u p to 25 0 u ser s.
1-11 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 1 Overview Network Configuration Examples A network backbone i s a high-ba ndwidth co nnectio n (such as Fast Ethe rnet or G igabit Ethe rnet) tha t interc onnects segm ents and netw ork resour ces.
1-12 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Ch ap ter 1 Ov er vi ew Netwo rk Conf igurati on Ex amples Collaps ed Backbo ne an d Switch Clu ster Configuratio n Figure 1-3 sh ows a con figura tion for a n etwor k of appro xi mat ely 50 0 em pl oyees.
1-13 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 1 Overview Network Configuration Examples Figur e 1 -3 Collapsed Back bone and Switc h Clust er Conf iguration Large C ampus C onfiguration Figure 1-4 shows a c on f i gur atio n fo r a n etw ork of m ore th an 1 0 00 users.
1-14 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Ch ap ter 1 Ov er vi ew Netwo rk Conf igurati on Ex amples Figur e 1 -4 Larg e Campus Confi gura tion Multidwelling Network.
1-15 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 1 Overview Network Configuration Examples All ports on the resident ial Catalyst 2950 switches (a nd Catalyst 2912-LRE XL or 2924-LR E XL switche s if th ey ar e incl u ded) ar e configur ed a s 8 02.
1-16 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Ch ap ter 1 Ov er vi ew Netwo rk Conf igurati on Ex amples Long-Distan ce, High-Ba ndwidth T ransport C onfiguration Note T o u se the fea ture de scr ibed in thi s se ctio n, yo u m ust have the E I i nstall ed on you r s witc h.
1-17 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 1 Overview Where t o Go Next Where to Go Next Before conf iguring the switch, re view th ese section s for start up.
1-18 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Ch ap ter 1 Ov er vi ew Where to Go Nex t.
C HAPTER 2-1 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 2 Using the Command-Line Interface This c ha pter d escri bes th e IO S comm an d-l ine int erfa ce ( CLI ) th at you c a n u se to con figure your switch es.
2-2 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapt er 2 Us i ng th e Com ma n d-L i ne In terfa ce IOS Command Modes T able 2-1 Command Mo de Summary Mode Acces s Met hod Prom pt Exit Met hod About Th is Mode User EXE C Be gin a session with your sw itch .
2-3 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 2 Using the Comm a nd-Line In terface Getting Help Getting Help Y ou can enter a qu es t i on ma rk (? ) at th e s y s tem pr om p t to d is p lay a lis t of co mm an d s a v ailab l e f or eac h comma nd mode .
2-4 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapt er 2 Us i ng th e Com ma n d-L i ne In terfa ce Using no and default Forms of Comman ds Using no and defa ult Forms of Comman ds Almos t e v ery co nf iguration comma nd also has a no form.
2-5 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 2 Using the Comm a nd-Line In terface Using Com mand History Using Command History The IOS provid es a history or re cord of com mands tha t you have entered.
2-6 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapt er 2 Us i ng th e Com ma n d-L i ne In terfa ce Using E diting Feature s Disabling the Comma nd History Fe ature The c ommand histor y feat ure is automatic ally enabled.
2-7 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 2 Using the Comm a nd-Line In terface Using Edit ing Featu res Editing C ommands throu gh Keystrok es Ta b l e 2 - 5 show s the ke yst rokes that you need to edit comman d lines.
2-8 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapt er 2 Us i ng th e Com ma n d-L i ne In terfa ce Using E diting Feature s Editing C ommand Lines that Wrap Y o u can use a w rap aro und f eature for c om mands t hat extend b eyond a singl e l ine on th e scre en .
2-9 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 2 Using the Comm a nd-Line In terface Searching and Filtering Output of show and m o re Co mm ands Use lin e wrapping with the co mman d history fe ature to recall and modif y previous complex co mmand entries.
2-10 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapt er 2 Us i ng th e Com ma n d-L i ne In terfa ce Access ing th e CLI from a Br owse r Accessing the CLI from a Bro wse.
C HAPTER 3-1 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 3 Getting Started with CMS This chapte r provides these topics about the Cluste r Management Suite (CMS ) software:.
3-2 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 3 Getting Started with CMS Feature s Features CMS p rovides these feat ures ( Figur e 3-1 ) for mana ging sw itch cl.
3-3 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 3 Getting Star ted with CMS Features • T wo lev els of access to the conf iguration optio ns: read-wr ite access f.
3-4 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 3 Getting Started with CMS Front Panel Vi ew Front Panel View When CMS is laun ched from a comma nd switch, the Front Panel vi ew displays the front -pan el images of all swit ches in the clus ter ( Figure 3-2 ).
3-5 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 3 Getting Star ted with CMS Front Pa nel Vie w Cluste r Tr ee The cl uster tre e ( Figure 3-2 ) appears in the left f rame of the Front P anel vie w and sh o ws the name of the cluste r and a list of its memb ers.
3-6 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 3 Getting Started with CMS Front Panel Vi ew Figure 3-5 shows the por t icons as th ey appea r in the fron t-panel imag es. T o select a port, cl ick the por t on the front-panel image.
3-7 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 3 Getting Star ted with CMS Front Pa nel Vie w Port Modes and LEDs The por t mode s ( Ta b l e 3 - 4 ) dete rmi ne t he t y pe of i nfo rma tion d ispl ayed thr ough the port LED s.
3-8 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 3 Getting Started with CMS Front Panel Vi ew VLAN Membership Modes Ports in the Fr ont P anel vie w are ou tlined by.
3-9 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 3 Getting Star ted with CMS Topol ogy View Topology Vie w The T opology vie w displays ho w the de vices within a switch cluster are conne cted and ho w the switch cluster i s con ne cte d to oth er cl usters and devices .
3-10 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 3 Getting Started with CMS Topology Vie w Figur e 3-6 Expan d Cluste r View Figur e 3-7 Collaps e Clust er View Right-click a link icon to displa y a link popup menu.
3-11 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 3 Getting Star ted with CMS Topol ogy View Topology Icons The T op ology view and the cl ust e r tree us e the sam e set of device icons to r epresen t cluster s, com mand and standby comma nd switch es, and m ember switches ( Figure 3-8 ).
3-12 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 3 Getting Started with CMS Topology Vie w Figur e 3-9 T opol og y-V iew Link Icons Device and Link L abels The T op.
3-13 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 3 Getting Star ted with CMS Topol ogy View The c olor o f a d ev ice la bel sho ws the cl uster member ship o f the de vice ( Ta b l e 3 - 1 0 ).
3-14 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 3 Getting Started with CMS Menu s an d Toolba r Menus and Tool bar The co nfigur ation a nd moni tori ng opt ions for configu ring sw itche s an d s wit ch c lust ers ar e av ailabl e from menu s and a toolbar .
3-15 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 3 Getting Star ted with CMS Menus and To olbar Note • W e strongly recomm end that the hig hest-en d, comm and-ca.
3-16 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 3 Getting Started with CMS Menu s an d Toolba r T able 3-1 1 Menu Bar Menu-B ar O ptio ns T ask CMS Page Setup Set de fau lt doc um en t pr int er p rop er ties t o be use d whe n pr intin g f ro m CM S.
3-17 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 3 Getting Star ted with CMS Menus and To olbar IGMP Sn oopin g 2 E nable and di sable In ternet Group Manage ment Protoc ol (IGMP) snoo ping an d IGMP Immediate-Lea ve proc essing on the switch.
3-18 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 3 Getting Started with CMS Menu s an d Toolba r Port Statistic s Display port sta tistics. Bandwidth G raphs Display g ra phs t hat plot the tota l ba nd width in use by t he swi tc h.
3-19 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 3 Getting Star ted with CMS Menus and To olbar Toolbar The toolba r buttons display com monly- used switch and cluster configurat ion options and i nformat ion wind o ws such as le gends and on line h elp.
3-20 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 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 available in the Front Panel view .
3-21 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 3 Getting Star ted with CMS Menus and To olbar Topology View P opup Men us These popu p menus ar e available in the T o pology vi ew . Link Popup Menu Y o u can displ ay reports a nd graphs for a specific link displa yed in the T opol ogy view ( Ta b l e 3 - 1 5 ).
3-22 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 3 Getting Started with CMS Menu s an d Toolba r Device Popup Menus Specific devices in the T opolo gy v iew display.
3-23 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 3 Getting Star ted with CMS Inter action Mo des Interaction Modes Y o u can ch an ge the inte ra ctio n m ode of CMS t o eit her gu ide or expert m ode . G uide m od e st ep s you through each fea ture optio n and provides i nformat ion about the parame ter .
3-24 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 3 Getting Started with CMS Wizards Guide Mode Note Gu ide mode is not av ailable if you r switch ac cess lev el is re ad-only . For more informa tion ab out the read- only acc ess mode, s ee the “ Ac cess Modes in CMS ” sect ion o n page 3-29 .
3-25 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 3 Getting Star ted with CMS Tool Tips Tool Tips CMS disp lays a po pup messa ge when yo u move your m ouse over the.
3-26 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 3 Getting Started with CMS CMS W indow Com ponents CMS Window Components CMS windo ws consistently present conf iguration info rmation. Figure 3-12 shows the components of a typical CMS window .
3-27 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 3 Getting Star ted with CMS CMS Wi nd ow Co mpo n ents window does n ot i ncl ud e Ca talyst 1900 a nd Cat alys t 282 0 switc he s even though t hey are pa rt o f the cluster .
3-28 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 3 Getting Started with CMS Access ing CMS Accessing CMS This section assumes the follo wing: • Y o u know the IP addre ss and pa ssword of t he com mand sw itch or a spe cific switch.
3-29 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 3 Getting Star ted with CMS Acce s sing CMS Access Mo des in CMS CMS pro vides tw o le v e ls of acce ss to the co nf igurat ion options: read-wr ite ac cess and read -only ac cess.
3-30 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 3 Getting Started with CMS Verifying Yo ur Cha nges Verifying Your Changes CMS pr ovid es notif i cation cues to help y ou track and conf irm t he cha nges yo u mak e.
3-31 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 3 Getting Star ted with CMS Restoring Your Configuration Restoring Your Configuration After you sav e a switch c on.
3-32 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 3 Getting Started with CMS Where to Go Nex t Where to Go Next Before conf iguring the switch , refer to th ese places for start- up info rmation: • Switch r elease notes on Cisco .
C HAPTER 4-1 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 4 Assigning the Switch IP Address and Default Gateway This chapt er describes ho w to create the initial switch conf iguration (for e xample, assig n the switch IP address an d default gateway informa tion) by using a variety of au tomati c and manua l methods.
4-2 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 4 Assigning the S witch IP Add ress and Defau lt Gateway Assign ing Swi tch Info rmatio n The boot loader a lso provid es trap-door access in to the system if the o perating system has problems serious enoug h that i t cannot be use d.
4-3 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 4 Assigni ng the Swi tch IP Addr ess an d Defa ult Ga tewa y Assigning Switch Information Default Switch Information Ta b l e 4 - 1 shows the def ault switch informatio n.
4-4 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 4 Assigning the S witch IP Add ress and Defau lt Gateway Assign ing Swi tch Info rmatio n DHCP Client Request Proce .
4-5 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 4 Assigni ng the Swi tch IP Addr ess an d Defa ult Ga tewa y Assigning Switch Information Configuring the DHCP Ser ver Y o u shoul d configure t he DHC P server wi th rese rved leases t hat ar e boun d to each switch by th e switc h hardware address.
4-6 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 4 Assigning the S witch IP Add ress and Defau lt Gateway Assign ing Swi tch Info rmatio n For the switch to successf ull y do wnl oad a conf igu ratio n f i le, the TFTP ser v er must contain one o r more configur ation files in its base direct ory .
4-7 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 4 Assigni ng the Swi tch IP Addr ess an d Defa ult Ga tewa y Assigning Switch Information Figur e 4-2 Rela y Devic e.
4-8 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 4 Assigning the S witch IP Add ress and Defau lt Gateway Assign ing Swi tch Info rmatio n Note The switch br oadcast.
4-9 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 4 Assigni ng the Swi tch IP Addr ess an d Defa ult Ga tewa y Assigning Switch Information DNS Ser ver Conf iguration The DNS server ma ps the TF TP server name ma ri ts u to IP address 10.
4-10 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 4 Assigning the S witch IP Add ress and Defau lt Gateway Checking and Saving th e Run ning Confi gura tion Manually.
4-11 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 4 Assigni ng the Swi tch IP Addr ess an d Defa ult Ga tewa y Checki n g an d Sav in g the Ru nnin g Co nfig ur atio n ! hostname Switch ! enable secret 5 $1$ej9.
4-12 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 4 Assigning the S witch IP Add ress and Defau lt Gateway Checking and Saving th e Run ning Confi gura tion no ip address shutdown ! interface Vlan1 ip address 172.20.
C HAPTER 5-1 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 5 Configuring IE2100 CNS Ag ents This chap ter describes h ow to c onfigure th e Intelligence Engine 2100 (IE2100) Series Cisco Netw orking Servic es (CNS) embe dded ag ent s on you r switc h.
5-2 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 5 Confi guring I E2100 CNS Agent s Unders tan ding IE21 0 0 Series Config uration Reg istrar Softwar e Figur e 5-1 C.
5-3 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 5 Configuring IE21 00 CNS Agents Understan ding IE2100 Series Configurat ion Registrar S oftware CNS E ven t Serv i ce The Conf iguration Regi strar uses the CNS Ev ent Servic e for rece ipt and ge neration of conf iguration e ven ts.
5-4 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 5 Confi guring I E2100 CNS Agent s Unders tan ding IE21 0 0 Series Config uration Reg istrar Softwar e DeviceID Each.
5-5 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 5 Configuring IE21 00 CNS Agents Unde rstan ding CNS Embe dde d Ag ent s Understandin g CNS Embedde d Agents The CNS e v ent ag ent feature allo ws the swit ch to publish and su bscribe to e vents on the e v ent b us and works with the CNS configurati on agent.
5-6 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 5 Confi guring I E2100 CNS Agent s Configur ing CNS Em b edded A gen ts Incremental (Partial) Configur ation After t he ne twork is r unn ing, new serv ice s ca n b e ad de d by using t he CN S c onfigura tion ag en t.
5-7 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 5 Configuring IE21 00 CNS Agents Config uri ng CNS Embe dded Ag en ts Note For more informatio n about running the s.
5-8 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 5 Confi guring I E2100 CNS Agent s Configur ing CNS Em b edded A gen ts Enabling th e CNS Ev ent Agent Note Y ou must e nable t he CNS ev ent agent on the s witch b efore y ou enab le the CNS conf igurat ion ag ent.
5-9 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 5 Configuring IE21 00 CNS Agents Config uri ng CNS Embe dded Ag en ts T o disable the CNS e v ent agent, use the no cns event { ip-address | hostname } glob al configur ation comm and.
5-10 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 5 Confi guring I E2100 CNS Agent s Configur ing CNS Em b edded A gen ts Step 3 config-cli or line -c li Enter config -cli to connect to the Config uration Registrar through t he interface de fined in cns c onfig connect-i ntf .
5-11 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 5 Configuring IE21 00 CNS Agents Config uri ng CNS Embe dded Ag en ts T o disa ble t he CNS conf igurati on age nt, use t he no cns conf ig initia l { ip-add r ess | hostname } global configurati on comm a nd.
5-12 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 5 Confi guring I E2100 CNS Agent s Displaying CNS Con figuration Enabling a Partial Configur ation Beginn ing in pr.
5-13 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 5 Configuring IE21 00 CNS Agents Displaying CNS Configuration show cns e v ent stats Displays statistic s about the CNS e ven t agent. show cns ev ent subject Disp la ys a li st of event ag en t s u bjec ts th at ar e s ubs cr ib ed t o by appli cations .
5-14 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 5 Confi guring I E2100 CNS Agent s Displaying CNS Con figuration.
C HAPTER 6-1 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 6 Clustering Switches This chapte r provides these topics to help you get started with switch clu stering: • Unde.
6-2 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 6 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 .
6-3 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 6 Clustering Switche s Underst anding Swi tch Clust ers Command Switch Character istics A Cataly st 2950 co mm an d swit ch m ust me et t hese r equi reme nts: • It is running Release 12.
6-4 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 6 Clustering Switches Unders tan din g Sw itch Cluste rs Note Ca talyst 2950 com mand sw itches r unning R eleas e 12. 1(9)EA1 or la ter can conn ect to s tandby com mand swit ches in the ma nage ment VLAN.
6-5 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 6 Clustering Switche s Planni ng a Swit ch Clust er Note Catalyst 2950 stand by command switche s runni ng Releas e 12. 1(9)EA1 or later can co nnect to candidat e and membe r switche s in VLANs di f fer ent from their mana gement VL ANs.
6-6 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 6 Clustering Switches Planning a Sw it ch Cl ust er Discovery through CDP Hops By using CDP , a comma nd switch can di scover switches up to se ven CDP hops away (the default is three hops) from the ed ge of the clus ter .
6-7 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 6 Clustering Switche s Planni ng a Swit ch Clust er Figur e 6-2 Disco very thr ough CDP Hops (Co mmand S witch Running Releas e 12.
6-8 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 6 Clustering Switches Planning a Sw it ch Cl ust er Discovery through Non-CDP-Capabl e and Noncluster-Capable Device.
6-9 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 6 Clustering Switche s Planni ng a Swit ch Clust er Discovery through the Same Managemen t VLAN A Catalyst 2900 XL command switch, a Ca talyst 2950 comma nd switch ru nning a rele ase earl ier than Release 12 .
6-10 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 6 Clustering Switches Planning a Sw it ch Cl ust er Discovery through Different M anagement VLANs W e recomme nd usin g a Catalyst 3550 com mand switch or a Catalyst 29 50 comm and swit ch runni ng Releas e 12.
6-11 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 6 Clustering Switche s Planni ng a Swit ch Clust er Figur e 6-6 Disco very thr ough Dif f er ent Ma nagem ent VLANs.
6-12 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 6 Clustering Switches Planning a Sw it ch Cl ust er Figur e 6-7 Disco v ery of Newly I nstalled S witc hes in the S.
6-13 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 6 Clustering Switche s Planni ng a Swit ch Clust er HSRP and S tandby Command Sw itches The switc h supp orts Hot Standby Router Protoc ol (HSRP) so that you ca n configure a gro up of standby comman d s wit che s.
6-14 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 6 Clustering Switches Planning a Sw it ch Cl ust er Virtual IP Addresses Y o u need to assig n a uniqu e virt ual IP add ress and gr oup num ber a nd name to t he clu ster sta ndby group.
6-15 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 6 Clustering Switche s Planni ng a Swit ch Clust er • All stan dby-group memb ers must be me mber s of the clust er . Note The re is no lim it to the number of sw itches that you can assi gn as standb y command switches.
6-16 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 6 Clustering Switches Planning a Sw it ch Cl ust er Automatic Recover y of Cluster Configuration The act iv e comm and swit ch cont inually forwards cluster-configura tion info rmati on (but not device-configurat ion info rmation) to the standby com mand switch.
6-17 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 6 Clustering Switche s Planni ng a Swit ch Clust er Host Names Y o u do not need to assign a host name to eit her a comm and swit ch or an el igible c luster mem ber .
6-18 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 6 Clustering Switches Planning a Sw it ch Cl ust er TACACS+ an d RADIUS Inconsistent authenti cation configur ations in switch clusters cause CMS to continually pr ompt for a user name and pa ssword.
6-19 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 6 Clustering Switche s Planni ng a Swit ch Clust er Manageme nt VLAN Communication wi th the sw itch manag ement int erfaces i s through the comma nd-switch IP address.
6-20 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 6 Clustering Switches Creating a Switch Cluster Availability of Switch-Specifi c Features in Switch Clusters The me nu bar on t he com mand switch disp lays al l optio ns available from the sw itch clust er .
6-21 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 6 Clustering Switche s Creati ng a Swit ch Cluster If you did not enab le a command switch durin g initial switch setup, launch De vice Manager from a command-cap able switch, a nd select Cluster > Cr eate Cluster .
6-22 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 6 Clustering Switches Creating a Switch Cluster If a cand idat e s witc h in th e gr oup has a password di fferent from t he gr oup, on ly that speci fic candi dat e switch is no t adde d to t h e cl us ter .
6-23 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 6 Clustering Switche s Creati ng a Swit ch Cluster Figur e 6-12 Using the T opolog y V iew t o A dd Membe r Switc h.
6-24 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 6 Clustering Switches Creating a Switch Cluster These a bbreviations are ap pended t o the switc h host nam es in t.
6-25 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 6 Clustering Switche s Creati ng a Swit ch Cluster Verifying a Switch Cluster When yo u fini sh adding cl uster me .
6-26 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 6 Clustering Switches Using the CLI to Ma nage Swit ch Cl us ters Using the CLI to Manage Swit ch Clusters Y o u can co nfigure memb er switch es from the CLI by f irst logg ing into the command switch .
6-27 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 6 Clustering Switche s Using S NMP to Ma nage Swit ch Clust ers Using SNMP to Manage Switc h Clusters When you firs.
6-28 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 6 Clustering Switches Using SNMP to Ma nage Sw itch Cl usters.
C HAPTER 7-1 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 7 Administering the Switch This cha pter descri bes how to perform one-t ime ope rations to administ er your switc h.
7-2 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 7 Adm inistering the Switch Protecting A ccess to Privileged EXE C Comman ds • If you want to u se use rn ame and .
7-3 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 7 Adminis ter ing the Switch Prote c ting Acce ss t o Priv i lege d EX EC Co mman ds Setting o r Changin g a Static Enab le Pa ssword The en able password control s access to the privileged EXEC mode.
7-4 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 7 Adm inistering the Switch Protecting A ccess to Privileged EXE C Comman ds Protecting En able and E nable Secre t .
7-5 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 7 Adminis ter ing the Switch Prote c ting Acce ss t o Priv i lege d EX EC Co mman ds If bo th the en able and e nable sec ret pas sword s are de f ined, us ers must enter th e enable s ecret p asswo rd.
7-6 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 7 Adm inistering the Switch Protecting A ccess to Privileged EXE C Comman ds T o remo v e the passwo rd, use the no password global configurat ion comm and.
7-7 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 7 Adminis ter ing the Switch Prote c ting Acce ss t o Priv i lege d EX EC Co mman ds Configuring Multiple Privilege Level s By default, the IOS sof tware has two mo des of password sec urity : user EX EC an d privileged EXEC.
7-8 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 7 Adm inistering the Switch Protecting A ccess to Privileged EXE C Comman ds When y ou set a command to a pr i vile ge le ve l, all command s whose syntax is a subs et of th at com mand are al so set to th at le v el.
7-9 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 7 Adminis ter ing the Switch Controlling Switch Access with TACACS+ Logging into and Exiting a Privilege Level Begin.
7-10 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 7 Adm inistering the Switch Controlling Sw itch Acce ss w ith TACACS+ Figur e 7 -1 T ypical T ACACS+ N etwo r k Con.
7-11 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 7 Adminis ter ing the Switch Controlling Switch Access with TACACS+ TACACS+ Ope ration When a use r attempts a sim ple ASCII login b y authent icating to a switch using T A CA CS+, this proc ess occurs: 1.
7-12 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 7 Adm inistering the Switch Controlling Sw itch Acce ss w ith TACACS+ This se ctio n c onta ins thi s configu ratio.
7-13 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 7 Adminis ter ing the Switch Controlling Switch Access with TACACS+ T o remo ve the specif ied T A CA CS+ server name or address, use the no tacacs- server ho st hostnam e global configurat ion comm and.
7-14 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 7 Adm inistering the Switch Controlling Sw itch Acce ss w ith TACACS+ Beginn ing in pri vilege d EXEC mode, follo w these st eps to conf igure login authent ication: Comma nd Pu rpos e Step 1 conf igure t erminal Enter globa l configurati on mode.
7-15 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 7 Adminis ter ing the Switch Controlling Switch Access with TACACS+ T o disa ble A AA, us e the no aaa new-model glo bal co nfigur atio n c omm and.
7-16 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 7 Adm inistering the Switch Controlling Sw itch Acce ss w ith TACACS+ Starting TACACS+ Accounting The AAA acco unting feature tracks th e services that users are acces sing an d the amoun t of netwo rk resources th at the y are co nsuming.
7-17 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 7 Adminis ter ing the Switch Controlling Switch Access with RADIUS Controlling Switch Access with RADIUS This sec t.
7-18 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 7 Adm inistering the Switch Controllin g Switch A cce ss wit h RA DIUS RADIUS is not suitable in these netw ork security situations: • Multipr otocol acce ss en vi ronmen ts.
7-19 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 7 Adminis ter ing the Switch Controlling Switch Access with RADIUS Configuring RADIUS This se ctio n de scri bes how to c onfigure your sw itch to su ppo rt R ADI US.
7-20 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 7 Adm inistering the Switch Controllin g Switch A cce ss wit h RA DIUS Y o u iden tif y R ADI US secu ri ty s er vers by the ir host na me or I P ad dre ss, host name a nd spe c ific UDP port num bers, or t heir I P addre ss and spec ific UDP port numb ers.
7-21 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 7 Adminis ter ing the Switch Controlling Switch Access with RADIUS Beginning i n privileged E XEC mo de, foll ow these s teps to c on figure p er-server R ADI US ser ver comm unicatio n.
7-22 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 7 Adm inistering the Switch Controllin g Switch A cce ss wit h RA DIUS This exampl e sho ws ho w to con fi gure one RADIUS ser ver to be us ed for au thentica tion and a nother to be us ed for ac coun ting : Switch(config)# radius-server host 172.
7-23 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 7 Adminis ter ing the Switch Controlling Switch Access with RADIUS Step 3 aaa authent ication logi n { default | list-name } method1 [ meth od2 ... ] Create a login auth entic ation meth od list.
7-24 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 7 Adm inistering the Switch Controllin g Switch A cce ss wit h RA DIUS T o disa ble A AA, us e the no aaa new-model glo bal co nfigur atio n c omm and.
7-25 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 7 Adminis ter ing the Switch Controlling Switch Access with RADIUS Be ginning in pri v ile ged EXEC mode, fo llo w .
7-26 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 7 Adm inistering the Switch Controllin g Switch A cce ss wit h RA DIUS T o remo ve the specif ied RADIUS serv er , u se the no radius-serv er host hostname | ip- address global configurat ion comm and.
7-27 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 7 Adminis ter ing the Switch Controlling Switch Access with RADIUS Beginn ing in pri vile ged EXEC mo de, follo w t.
7-28 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 7 Adm inistering the Switch Controllin g Switch A cce ss wit h RA DIUS Configuring Settings for All RADIUS S ervers.
7-29 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 7 Adminis ter ing the Switch Controlling Switch Access with RADIUS For e x am ple , th e f oll o wing A V p air act.
7-30 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 7 Adm inistering the Switch Controllin g Switch A cce ss wit h RA DIUS Beginning i n privileged EXEC mode, f ollow .
7-31 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 7 Adminis ter ing the Switch Configuring the Switch for Local Authentication and Authorization Configuring the Swit.
7-32 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 7 Adm inistering the Switch Managin g the Syste m Time and Date Managing the System Time and Date Y o u can ma nage.
7-33 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 7 Adminis ter ing the Switch 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 dev ice with the lo west stratum number with which it communic ates through NTP .
7-34 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 7 Adm inistering the Switch Managin g the Syste m Time and Date Figur e 7 -3 T ypical NTP Netw or k Config ura tion.
7-35 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 7 Adminis ter ing the Switch Mana gi ng th e S y stem Tim e an d Da t e Default NTP Configurati on Ta b l e 7 - 2 shows the d efault NTP co nfigurati on. NTP is enable d on all interfa ces b y default.
7-36 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 7 Adm inistering the Switch Managin g the Syste m Time and Date T o dis ab le N TP au then tic atio n, use the no ntp authenticate global configurat ion comm and.
7-37 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 7 Adminis ter ing the Switch Mana gi ng th e S y stem Tim e an d Da t e Y o u need to co nfigure only one end of an assoc iation; the other de vice can a utomat icall y establi sh the associat ion.
7-38 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 7 Adm inistering the Switch Managin g the Syste m Time and Date T o disable the interface from s ending NTP broadcast pack ets, use the no ntp broadcast interface conf igurat ion command.
7-39 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 7 Adminis ter ing the Switch Mana gi ng th e S y stem Tim e an d Da t e Creating an Access Gro up and Assigni ng a .
7-40 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 7 Adm inistering the Switch Managin g the Syste m Time and Date If the source IP address m atches the access lists fo r more t han one acces s type, the f irst typ e is grant ed.
7-41 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 7 Adminis ter ing the Switch Mana gi ng th e S y stem Tim e an d Da t e Beginn ing in pri vile ged EXEC mode, follo.
7-42 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 7 Adm inistering the Switch Managin g the Syste m Time and Date Setting the System Clock If you have an outsid e source on the net work that pr ovides time ser vices, su ch as a n NTP server , you do not need to manuall y set the syste m clock.
7-43 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 7 Adminis ter ing the Switch Mana gi ng th e S y stem Tim e an d Da t e Configuring the Tim e Zone Beginn ing in pr.
7-44 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 7 Adm inistering the Switch Managin g the Syste m Time and Date Configuring Summer Time (Daylight Saving Ti me) Beg.
7-45 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 7 Adminis ter ing the Switch Mana gi ng th e S y stem Tim e an d Da t e Beginning in privileged EX EC mode, fol low.
7-46 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 7 Adm inistering the Switch Configur ing a Sys tem Nam e and Prompt Configuring a System Name a nd Prompt Y o u configure the system name on the switc h to identi fy it.
7-47 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 7 Adminis ter ing the Switch Confi guring a S ystem Name an d Prompt Configuring a System P rompt Beginning i n pri.
7-48 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 7 Adm inistering the Switch Configur ing a Sys tem Nam e and Prompt Default DNS Configur ation Ta b l e 7 - 3 shows the d efault DN S configur ation .
7-49 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 7 Adminis ter ing the Switch Creat ing a Bann er domain name is the v alue set by the ip d oma in -n ame glo bal c onfigurati on c om mand.
7-50 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 7 Adm inistering the Switch Creating a Banner Configurin g a Mess age-of-the -Day Log in Bann er Y ou can create a sing le or mult iline messa ge b anner tha t a ppea rs on th e scr een wh en so m eone lo g s in to the switch.
7-51 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 7 Adminis ter ing the Switch Creat ing a Bann er Configurin g a Login B anner Y o u c an co nfigur e a l og in ba nner t o be di spla yed on al l c onnec ted t ermin al s.
7-52 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 7 Adm inistering the Switch Managin g the MAC A ddre ss Table Managing the MAC Ad dress Tabl e The MA C address table cont ains add ress inf ormation that th e switc h uses to fo rwar d traf fic betwe en ports.
7-53 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 7 Adminis ter ing the Switch Managin g the MAC Addre ss Table MAC Addr esses an d VLANs All addr esses are as sociate d with a VLAN. An add ress can e xist in more than one VLA N and ha ve different de stinati ons in each.
7-54 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 7 Adm inistering the Switch Managin g the MAC A ddre ss Table T o retur n to the default v alue, use the no mac address-table agi ng-time global configurati on comma nd.
7-55 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 7 Adminis ter ing the Switch Managin g the MAC Addre ss Table Beginning i n privileged E X EC mo de , follow these .
7-56 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 7 Adm inistering the Switch Managin g the MAC A ddre ss Table T o disable the switch fr om sending MA C address notification tra ps, use the no snmp-serv er enable traps mac-notification global con f igura tion co mman d.
7-57 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 7 Adminis ter ing the Switch Managin g the MAC Addre ss Table Beginning i n privileged EX EC mo de , follo w these .
7-58 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 7 Adm inistering the Switch Managin g the MAC A ddre ss Table Beginning i n privileged EX EC mo de , follow these s.
7-59 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 7 Adminis ter ing the Switch Managi ng the ARP Ta ble Managing the ARP Ta ble T o commun icate w ith a de vice (o v er Eth ernet, for e xam ple), the softw are f irst m ust dete rmine the 48-bi t MA C or the local data link addre ss of that device.
7-60 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 7 Adm inistering the Switch Managin g the ARP Table.
C HAPTER 8-1 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 8 Configuring 802.1X Port-Ba sed Authen tication This cha pter describ es how to configure IEEE 802 .1X port-ba sed au thentic ation to pr e vent unautho rized devices (clie nt s) f rom ga ining ac cess to the network.
8-2 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 8 Configur ing 802. 1X Port-Bas ed Authen ticati on Unders tan ding 802.1X Port -Based A ut henticat io n Device Roles W it h 802.1X po rt-ba sed authentic ation, the de vices in the netw ork ha ve specif ic role s as sho wn in Figure 8-1 .
8-3 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 8 Configuring 8 02.1X Port-B as ed Authen ti cat ion Understandi ng 802.1X P ort-Based Aut henticat ion Authentication Initiation and Message Exchange The swi tch or th e client can initi ate authen tication.
8-4 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 8 Configur ing 802. 1X Port-Bas ed Authen ticati 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 determi nes whet her or not the client is gran ted acces s to the net work.
8-5 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 8 Configuring 8 02.1X Port-B as ed Authen ti cat ion Configuring 802.
8-6 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 8 Configur ing 802. 1X Port-Bas ed Authen ticati on Configur ing 80 2. 1X Au thent ica tion Default 802.1X Configuration Ta b l e 8 - 1 shows the d efault 80 2.1X configur ation .
8-7 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 8 Configuring 8 02.1X Port-B as ed Authen ti cat ion Configuring 802. 1X Authent ication 802.1X Configuration Guidelines These ar e the 80 2.1X authenti cation co nfigurati on guid elines : • When 802.
8-8 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 8 Configur ing 802. 1X Port-Bas ed Authen ticati on Configur ing 80 2. 1X Au thent ica tion Enabling 802.1X Authentication T o enable 802 .1X port-based auth entication , you must enable AAA and specify the au thenticatio n method list.
8-9 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 8 Configuring 8 02.1X Port-B as ed Authen ti cat ion Configuring 802.
8-10 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 8 Configur ing 802. 1X Port-Bas ed Authen ticati on Configur ing 80 2. 1X Au thent ica tion This exam ple sh ows how to specify the server w it h IP add re ss 172. 20.
8-11 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 8 Configuring 8 02.1X Port-B as ed Authen ti cat ion Configuring 802.
8-12 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 8 Configur ing 802. 1X Port-Bas ed Authen ticati 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 dentity frame.
8-13 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 8 Configuring 8 02.1X Port-B as ed Authen ti cat ion Configuring 802.
8-14 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 8 Configur ing 802. 1X Port-Bas ed Authen ticati on Display ing 802.1 X Stat is t ics and Status T o disabl e multip le hosts on the po rt, use the no do t1x mu ltipl e-ho sts interface conf iguration c ommand.
C HAPTER 9-1 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 9 Configuring Interface Cha racteristics This c ha pter d efines the ty pes o f i nte rface s on th e swi tch and de scri bes how to c on figure th em .
9-2 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 9 Con figuring Interface Chara cteristics Unders tan ding Inte rfa ce Type s VLAN partitio ns provid e hard fire walls for traff ic in the VLAN, and each VLAN has its o wn MA C address table.
9-3 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 9 Configuring In te rface Charac teristics Unde rsta ndi n g In t erf ac e Ty p es Trunk Ports A trunk port carries th e traf f ic of multiple VLANs and by default is a member of all VLANs in the VLAN database .
9-4 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 9 Con figuring Interface Chara cteristics Using the Inter fa ce Command Figur e 9-1 Connecting VLANs with La y er 2 .
9-5 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 9 Configuring In te rface Charac teristics Using the Interface Command Procedures for Configuring In terfaces These ge neral instruc tions apply to all interfa ce conf igurati on processes.
9-6 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 9 Con figuring Interface Chara cteristics Using the Inter fa ce Command reliability 255/255, txload 1/255, rxload 1/.
9-7 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 9 Configuring In te rface Charac teristics Using the Interface Command When usin g the interf ace range global confi.
9-8 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 9 Con figuring Interface Chara cteristics Using the Inter fa ce Command If you ent e r multi pl e co nfigura t ion com mands whi l e you are in inter face rang e m ode, e ac h com ma nd is ex ecute d as it is entered.
9-9 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 9 Configuring In te rface Charac teristics Configuring Layer 2 Interfaces • All interf aces in a range must be the.
9-10 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 9 Con figuring Interface Chara cteristics Configur ing Layer 2 In ter faces Configuring In terface Sp eed and Du plex M ode Ether net in terfaces on the switch op erate in 10, 1 00, or 1000 M bps and i n eith er full or hal f duplex mod e.
9-11 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 9 Configuring In te rface Charac teristics Configuring Layer 2 Interfaces These sec tions descr ibe how to configur.
9-12 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 9 Con figuring Interface Chara cteristics Configur ing Layer 2 In ter faces Use the no spee d and no duplex interf a ce c onf igu ratio n comm and s to re turn th e inte rf ace to the d ef ault speed and duple x settin gs (autone gotiate ).
9-13 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 9 Configuring In te rface Charac teristics Configuring Layer 2 Interfaces • rec e ive o f f an d send on : The port send s pause fra mes if the r emote device supports flow contro l but canno t recei v e pause f rames fr om the remo te de vice.
9-14 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 9 Con figuring Interface Chara cteristics Monito rin g and Mai nt aining th e In terfaces Use the no description interface configurat ion comm and to delete the de script ion.
9-15 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 9 Configuring In te rface Charac teristics Monitoring and Maintaining the Interfaces This exam ple sh ows how to di.
9-16 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 9 Con figuring Interface Chara cteristics Monito rin g and Mai nt aining th e In terfaces no ip address mls qos cos.
9-17 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 9 Configuring In te rface Charac teristics Monitoring and Maintaining the Interfaces Shutting Down and Restarting t.
9-18 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 9 Con figuring Interface Chara cteristics Monito rin g and Mai nt aining th e In terfaces.
C HAPTER 10-1 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 10 Configuring STP This chapt er describ es ho w to configure the Span ning Tree Protocol (STP) on you r switch.
10-2 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 10 Configuring STP Unders tan ding Spa nni ng-Tree Fea tures • Spanning Tree and Redun da nt Co nnec tivity , pag.
10-3 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 10 Configuring STP Unders tanding Spanni ng-Tree Featu res • Message age • The iden tif ier of the sending inte.
10-4 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 10 Configuring STP Unders tan ding Spa nni ng-Tree Fea tures BPDUs conta in informa tion about the sending switch and i ts ports, inclu ding switch a nd MA C addresses, swit ch pri ority , port prior ity , and path co st.
10-5 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 10 Configuring STP Unders tanding Spanni ng-Tree Featu res Creating the S pannin g-Tree To pology In Figure 10 -1 ,.
10-6 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 10 Configuring STP Unders tan ding Spa nni ng-Tree Fea tures An interfac e mov es through these state s: • From i.
10-7 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 10 Configuring STP Unders tanding Spanni ng-Tree Featu res Blocking State A Layer 2 in ter f ace in th e b lo ckin g state does not p ar tic ipate in frame f o rw a rdin g.
10-8 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 10 Configuring STP Unders tan ding Spa nni ng-Tree Fea tures Disabled State A Laye r 2 int erface in th e disab led state do es not parti cipa te in frame forwar ding or in the span ning tree.
10-9 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 10 Configuring STP Confi guring S panni ng-Tree Featu res Figur e 1 0-3 Spanning T ree and Redun dan t Conne ctiv ity Y o u can also c reate red undan t links betwe en switches by using EtherCha nnel gro ups.
10-10 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 10 Configuring STP Configur ing Span ning-T ree F eature s • Conf iguring the Hello T ime, page 10-19 • Conf i.
10-11 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 10 Configuring STP Confi guring S panni ng-Tree Featu res Cautio n Switches that are not running spanning tree still for ward BPDUs that the y recei v e so that the other switche s on the V LA N that have a run ning span ning -tree in stance can b reak l oops.
10-12 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 10 Configuring STP Configur ing Span ning-T ree F eature s Disabling STP STP is e nabl ed by d efau lt on V LAN 1 a nd on al l newly cre ated V LAN s u p to the sp anni ng- tree lim it specif ied in T able 10- 3 .
10-13 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 10 Configuring STP Confi guring S panni ng-Tree Featu res These e xamp les sho w the ef fect of th e spanning-tree.
10-14 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 10 Configuring STP Configur ing Span ning-T ree F eature s Be gin n in g i n p r i vil e g ed E XEC m ode, follo w.
10-15 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 10 Configuring STP Confi guring S panni ng-Tree Featu res Beginn ing in pri vile ged EXEC mo de, follo w these ste.
10-16 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 10 Configuring STP Configur ing Span ning-T ree F eature s Note Th e show spanning-tree int erface interface- id privileged EXEC command displa ys informat ion only if th e por t is i n a l ink -up op er ative state .
10-17 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 10 Configuring STP Confi guring S panni ng-Tree Featu res Note Th e show spanning-tree int erface interface- id privileged EXEC command displa ys informat ion only for por ts that ar e in a link- up opera ti ve s tate.
10-18 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 10 Configuring STP Configur ing Span ning-T ree F eature s Configuring the Switch Priority of a VLAN Y ou can config ure the switch prior ity and make it more lik ely that the switc h will be chosen as t he root switch.
10-19 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 10 Configuring STP Confi guring S panni ng-Tree Featu res Configuring the Hello Time Y ou can config ure the interv al b etween the genera tion of conf iguratio n messages by the root switch b y chan ging the hello tim e.
10-20 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 10 Configuring STP Configur ing Span ning-T ree F eature s T o retur n the switc h to its def ault settin g, use the no spanning-tr ee vlan vlan -id for w a r d - t i m e gl obal configurati on comm a nd.
10-21 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 10 Configuring STP Display ing the S panning -Tree St atus Figur e 1 0-4 Gig abi t Ether ne t Stac k Displaying th.
10-22 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 10 Configuring STP Displaying the Spannin g-Tree Stat us.
C HAPTER 11-1 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 11 Configuring RSTP and MST P This ch apter descr ibes how to co nfigure the C isco im plement ation of the IE EE 80 2.1W Ra pid Spa nning T ree Protocol (RSTP) and th e IEEE 802.
11-2 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 11 Co nfiguring R ST P and M ST P Unders tan din g RSTP Understandin g RSTP The RSTP takes ad vantage of point- to-po int wiring and provides rapi d conv ergence of the span ning tree .
11-3 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 11 Configuring RSTP and MSTP Understa nding RST P T o be consistent with Cisco STP implementation s, this guide documents the por t state as bloc k ing instead of discar ding .
11-4 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 11 Co nfiguring R ST P and M ST P Unders tan din g RSTP Figur e 1 1 -1 Pr oposal an d A gr eement Handshaking for R.
11-5 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 11 Configuring RSTP and MSTP Understa nding RST P Figur e 1 1 -2 Sequence of Ev ents Dur ing Rapid Con ver ge nce Bridge Protoco l Data Unit Format an d Process ing The R STP BP DU for mat is th e sam e as t he IEEE 802.
11-6 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 11 Co nfiguring R ST P and M ST P Unders tan din g RSTP The RSTP does not have a separate topol ogy chan ge notificati on (TCN) BPDU . It uses the topology change (T C) flag to sho w the to pology cha nges.
11-7 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 11 Configuring RSTP and MSTP Unde rsta ndi n g MS TP • Propagatio n — When an RSTP s witch r ecei ves a TC mess.
11-8 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 11 Co nfiguring R ST P and M ST P Unders tan din g MSTP IST, CIST, an d CST Unlike PVST+ i n which all the spann in.
11-9 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 11 Configuring RSTP and MSTP Unde rsta ndi n g MS TP Operations Between M ST Regions If there are multip le regio ns or legacy 802.
11-10 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 11 Co nfiguring R ST P and M ST P Unders tan din g MSTP Hop Count The IST and M ST inst ances do not use the mes sage- age an d maximum -age informa tion in the configurati on BPDU to comp ut e t he sp an ning- tre e t opolo gy .
11-11 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 11 Configuring RSTP and MSTP Interoperability with 802.1D STP Interoperability with 802.1D STP A switch running both M STP a nd RST P supports a built-in p rotoco l migrati on m ec ha nism t ha t ena bl es it to interoperate with leg acy 802.
11-12 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 11 Co nfiguring R ST P and M ST P Configuring RSTP and MSTP Featur es Default RSTP and MS TP Configura tion T able 11-3 sh ows the de fault RST P a nd M STP c onfiguration .
11-13 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 11 Configuring RSTP and MSTP Confi guring RSTP and MSTP Featu res Specifying the MST Region Co nfiguration and En .
11-14 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 11 Co nfiguring R ST P and M ST P Configuring RSTP and MSTP Featur es configurati on com mand. T o retur n to the default revision nu mber, use the no revision MST conf igurat ion comman d.
11-15 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 11 Configuring RSTP and MSTP Confi guring RSTP and MSTP Featu res Note Th e ro ot swi tch fo r eac h s pan ning -t ree inst anc e shoul d b e a ba ckbon e or dist ribution sw itch .
11-16 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 11 Co nfiguring R ST P and M ST P Configuring RSTP and MSTP Featur es Configur ing a Se co ndar y R oot S witch Wh.
11-17 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 11 Configuring RSTP and MSTP Confi guring RSTP and MSTP Featu res Configuring the Port Priority If a l oop occur s, the MST P uses the port priority when selec ting an in terface to put in to the for warding state.
11-18 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 11 Co nfiguring R ST P and M ST P Configuring RSTP and MSTP Featur es Configuring the Path Cost The MSTP path cost def ault v alue is deri v ed from the media speed of an interf ace.
11-19 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 11 Configuring RSTP and MSTP Confi guring RSTP and MSTP Featu res Configuring the Switch Priority Y ou can config ure the switch prior ity and make it more lik ely that the switc h will be chosen as the root switch.
11-20 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 11 Co nfiguring R ST P and M ST P Configuring RSTP and MSTP Featur es Beginn ing in pri vileg ed EXEC mode, follo .
11-21 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 11 Configuring RSTP and MSTP Confi guring RSTP and MSTP Featu res Configuring the Maxi mum-Aging Time Beginning in.
11-22 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 11 Co nfiguring R ST P and M ST P Configuring RSTP and MSTP Featur es Specifying the Link Type to Ensure Rapid Tra.
11-23 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 11 Configuring RSTP and MSTP Displaying the MST Configuration and Status Displaying the MST Configuratio n and Sta.
11-24 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 11 Co nfiguring R ST P and M ST P Displaying the MST Configu rat ion and Status.
C HAPTER 12-1 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 12 Configuring Optional Spannin g-Tree Features This cha pter descri b es how to configure opt iona l span ning- t ree fea tu res. Y o u ca n configur e all of the se featu re s whe n you r swi t ch is run ning th e per-VLAN sp anni ng-tre e (PVST ).
12-2 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapte r 12 Configurin g Optiona l Spann ing-Tr ee Featu res Unders tan ding Opti on al Spann ing -Tree Fe at ures Understa.
12-3 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 12 Configuring Op tiona l Spa nni ng-Tree Features Unders tanding Opt ional Spanning- Tree Featu res Understanding .
12-4 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapte r 12 Configurin g Optiona l Spann ing-Tr ee Featu res Unders tan ding Opti on al Spann ing -Tree Fe at ures Understa.
12-5 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 12 Configuring Op tiona l Spa nni ng-Tree Features Unders tanding Opt ional Spanning- Tree Featu res Figur e 12-3 U.
12-6 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapte r 12 Configurin g Optiona l Spann ing-Tr ee Featu res Unders tan ding Opti on al Spann ing -Tree Fe at ures How CSUF Work s CSUF ensures that one link in the stack is elected as the path to the root.
12-7 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 12 Configuring Op tiona l Spa nni ng-Tree Features Unders tanding Opt ional Spanning- Tree Featu res The switch sen.
12-8 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapte r 12 Configurin g Optiona l Spann ing-Tr ee Featu res Unders tan ding Opti on al Spann ing -Tree Fe at ures Limitati.
12-9 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 12 Configuring Op tiona l Spa nni ng-Tree Features Unders tanding Opt ional Spanning- Tree Featu res Figur e 12-6 G.
12-10 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapte r 12 Configurin g Optiona l Spann ing-Tr ee Featu res Unders tan ding Opti on al Spann ing -Tree Fe at ures Understand ing Back boneF ast Backbo neFas t detects ind irect failures in the core of th e backbon e.
12-11 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 12 Configuring Op tiona l Spa nni ng-Tree Features Unders tanding Opt ional Spanning- Tree Featu res If lin k L 1 fail s as s hown in Figure 12 -8 , Switch C cannot det ect this f ailure bec ause it is not co nnected direct ly to link L1.
12-12 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapte r 12 Configurin g Optiona l Spann ing-Tr ee Featu res Unders tan ding Opti on al Spann ing -Tree Fe at ures Unders tanding Root Gu ar d The Laye r 2 network of a service provide r (SP) can incl ude many co nnectio ns to switche s that are no t owned by the SP .
12-13 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 12 Configuring Op tiona l Spa nni ng-Tree Features Configurin g Optional Spanni ng-Tree Fe atures Understand ing L.
12-14 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapte r 12 Configurin g Optiona l Spann ing-Tr ee Featu res Configur ing Optiona l Spanning- Tree Fea tures Default Optional Spanning-Tree Conf iguration T able 12-1 sh ows the default opt iona l spa nn ing- tree co nfigurat ion.
12-15 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 12 Configuring Op tiona l Spa nni ng-Tree Features Configurin g Optional Spanni ng-Tree Fe atures Note Y ou ca n use the spa nning-tre e portfast default global con figuration co mmand to global ly enab le the Port Fast featur e on all nontrun king por ts.
12-16 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapte r 12 Configurin g Optiona l Spann ing-Tr ee Featu res Configur ing Optiona l Spanning- Tree Fea tures T o disable BPDU guard, use the no spanning-tree por tfast bpduguard default global configur ation comm an d.
12-17 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 12 Configuring Op tiona l Spa nni ng-Tree Features Configurin g Optional Spanni ng-Tree Fe atures T o disable BPDU filte ring, use t he no spanning-tree portfa st bpdufilt er default global configurat ion comm an d.
12-18 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapte r 12 Configurin g Optiona l Spann ing-Tr ee Featu res Configur ing Optiona l Spanning- Tree Fea tures Enabling C ross-S tack Up linkFas t Before ena bling CSU F , make sure your sta ck switch es are proper ly connec ted.
12-19 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 12 Configuring Op tiona l Spa nni ng-Tree Features Configurin g Optional Spanni ng-Tree Fe atures Enabling Ba ckbon eFast Y o u can en able Bac kboneFast to detect indi rect li nk failures and to start the sp anning- tree reconfigur atio n soo ne r .
12-20 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapte r 12 Configurin g Optiona l Spann ing-Tr ee Featu res Configur ing Optiona l Spanning- Tree Fea tures T o disa ble ro ot g uard, use the no spanning-tre e guard interf ace conf igurati on command.
12-21 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 12 Configuring Op tiona l Spa nni ng-Tree Features Display ing the S panning -Tree St atus Displaying the Sp annin.
12-22 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapte r 12 Configurin g Optiona l Spann ing-Tr ee Featu res Displaying the Spannin g-Tree Stat us.
C HAPTER 13-1 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 13 Configuring VLANs This c hapt er d escri b es how to c onfigure norm al -ra nge V LAN s (V L AN IDs 1 to 100 5) and extended-ra nge V LANs (VLAN I Ds 100 6 to 4094 ).
13-2 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 13 Co n figuring VLANs Unders tan ding VLAN s Figure 13-1 shows an exam ple of V L ANs segmented into l ogica lly defined n etwor ks. Figur e 13-1 VLANs as Logically Defined Netw or k s VLANs are of ten assoc iated with IP su bnetw orks.
13-3 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 13 Configuring VLA Ns Unde rst an din g VLA Ns VLAN Port M embership M odes Y o u configure a port to belong to a VLAN by assigning a me mber ship mode that de termin es the ki nd of traf fic the port c arries and t he number of V LANs to which i t can belon g.
13-4 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 13 Co n figuring VLANs Configur ing Normal- R ang e VLAN s Configuring Normal -Range VLANs Normal- range VL A Ns are VL ANs with VLA N I Ds 1 to 1005 .
13-5 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 13 Configuring VLA Ns Configur ing N orma l -Ran g e VL A N s This sect ion incl udes infor mation ab out these top.
13-6 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 13 Co n figuring VLANs Configur ing Normal- R ang e VLAN s is to a llow all VLA Ns ), th e new VLAN is ca rrie d o n all t ru nk po rts.
13-7 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 13 Configuring VLA Ns Configur ing N orma l -Ran g e VL A N s Saving VL AN Configur ation The co nfiguration s of VLAN IDs 1 to 10 05 are a lways sa ved in the VLA N database (vlan.
13-8 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 13 Co n figuring VLANs Configur ing Normal- R ang e VLAN s Default Ethernet VLAN Configuration T able 13-2 shows the default co nfig uration for Ethernet VL ANs. Note The switch suppo rts Ethe rnet interf aces exc lusi v ely .
13-9 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 13 Configuring VLA Ns Configur ing N orma l -Ran g e VL A N s Beginning i n privileged EXEC mode, f ollow these st .
13-10 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 13 Co n figuring VLANs Configur ing Normal- R ang e VLAN s T o return th e VLAN name to th e defaul t settings, use th e no vlan vlan-id name or no vl an vlan-i d mtu VLAN conf iguration comm and.
13-11 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 13 Configuring VLA Ns Configur ing N orma l -Ran g e VL A N s Assigning S tatic-Ac cess Ports to a VLAN Y o u can assi gn a s tati c-ac cess port to a VLAN wi tho ut having VT P gl obal ly p rop agate V LAN configurat ion inf orm at ion ( VTP is di sabl ed).
13-12 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 13 Co n figuring VLANs Configur ing Extended-R ange VLA Ns Configuring Ex tended-Rang e VLANs When the switch is in VTP transparent mode (VT P disabled) and the EI is installed) , you can create extended -rang e VLA Ns ( in the ra nge 1006 t o 4094).
13-13 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 13 Configuring VLA Ns Confi guring Exte nded-Ra nge VL ANs • STP is enable d by default on extended -range V LANs, but you can di sable it by using the no spann ing- tre e vlan vlan-id global co nfigur ation c omm an d.
13-14 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 13 Co n figuring VLANs Displa ying VL ANs T o delete an extend ed-range VLA N, use the no vlan vlan-i d global configurat ion comm and. The proc edure fo r assign ing stat ic-acc ess port s to an ext ended-r ange VLAN is the s ame as for normal-ra nge VL ANs.
13-15 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 13 Configuring VLA Ns Config uri n g VL AN Tr unk s Configuring VLAN T runks These sec tions descr ibe how VLAN trunks functio n on the swi tch: • T runking O verview , page 13 -15 • 802.
13-16 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 13 Co n figuring VLANs Configur ing VLAN Trunk s T o avoid this, yo u s hould configu re int erfac es conn ect ed t o devices tha t do no t sup port DTP to n ot forward D TP frame s, tha t i s, to t urn off DTP .
13-17 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 13 Configuring VLA Ns Config uri n g VL AN Tr unk s • Disabling span ning tree on the na ti v e VLAN of an 802.1 Q trunk without d isabling spann ing tree on e very VLAN i n the network can po tentia lly cause spa nning-t ree loops.
13-18 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 13 Co n figuring VLANs Configur ing VLAN Trunk s – STP Port F ast setting – trunk s tat us: i f o ne po rt i n a po rt g rou p ce as es t o b e a t runk, a ll por t s ce ase t o be t runk s.
13-19 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 13 Configuring VLA Ns Config uri n g VL AN Tr unk s Switch(config-if)# switchport mode dynamic desirable Switch(config-if)# end Defining the Allowed VLANs on a Trunk By default, a trunk port sends traf f ic to and re cei ves tra ff ic from al l VLANs.
13-20 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 13 Co n figuring VLANs Configur ing VLAN Trunk s Changing the Pruning-Elig ible List The prunin g-eligible l ist applies o nly to t runk ports. Each tru nk port has its o wn eligibilit y list.
13-21 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 13 Configuring VLA Ns Config uri n g VL AN Tr unk s Beginning i n privileged EX EC mo de, foll ow these s teps to c onfigure th e nat iv e VL AN on an 8 02.
13-22 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 13 Co n figuring VLANs Configur ing VLAN Trunk s In thi s way , Trunk 1 c arri es t r affic for VLA Ns 8 t hr oug h 10, a nd Trunk 2 c ar rie s tra ff ic fo r VLA Ns 3 through 6.
13-23 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 13 Configuring VLA Ns Config uri n g VL AN Tr unk s Load Sharing Using STP Path C ost Y o u can co nfigure paralle l trunks to share VLAN traffic by setting di fferent path costs on a trunk and associ ating the path costs with dif feren t sets of VLA Ns.
13-24 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 13 Co n figuring VLANs Configuring VMPS Beginn ing in pri vile ged EXE C mode, follo w these steps to conf ig ure .
13-25 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 13 Configuring VLA Ns Configuring VMPS • “ Monitori ng the VMPS ” sectio n on pa ge 13-31 • “ T rouble s.
13-26 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 13 Co n figuring VLANs Configuring VMPS If the link goes do wn on a dynamic por t, the port retur ns to an isolated state and does not belong to a VLAN.
13-27 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 13 Configuring VLA Ns Configuring VMPS ! address <addr> vlan-name <vlan_name> ! address 0012.2233.4455 vlan-name hardware address 0000.6509.a080 vlan-name hardware address aabb.
13-28 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 13 Co n figuring VLANs Configuring VMPS VMPS Configuration Guidelines These gui deline s and restric tions app ly to dynami c port VL AN memb ership: • Y o u must co nfigure the VMPS befo re you con figure ports as dyna mic.
13-29 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 13 Configuring VLA Ns Configuring VMPS Beginn ing in pri vilege d EXEC mode, follo w these step s to enter the IP address of the VMPS: Note The switch port that is co nnected to the V MPS serv er cannot be a dynamic acc ess port.
13-30 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 13 Co n figuring VLANs Configuring VMPS Reconfirming VLAN Memberships Beginning in privileged EXEC mo de, foll ow .
13-31 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 13 Configuring VLA Ns Configuring VMPS T o retur n the switc h to its def ault settin g, use the no vmps r etry global configura tion c om mand .
13-32 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 13 Co n figuring VLANs Configuring VMPS VMPS Co nfig ur at ion Ex am ple Figure 13-5 shows a ne twork with a VMPS serve r switch and V MPS client switches with dynamic p orts.
C HAPTER 14-1 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 14 Configuring VTP This c hapt er d escri b es how to us e t he V LAN Trunking Pr otoc ol ( VTP) a nd t he V LAN dat aba se for managing V LANs .
14-2 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 14 Configuring VTP Unders tan din g VTP The VTP Do main A VTP do ma in ( also c alle d a VLA N ma nage ment domai n ) con sis ts of o ne sw itch or several interconn ected swit ches under th e same a dministrati ve responsibili ty sharing the same VTP d omain name.
14-3 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 14 Configuring VTP Understanding VTP VTP Mode s Y o u can co nfigure a supporte d switch to be in one of the VTP modes liste d in Ta b l e 1 4 - 1 .
14-4 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 14 Configuring VTP Unders tan din g VTP • MD5 diges t VLAN co nf igurat ion, in clud ing max imum tr ansmi ssion unit (M TU) si ze fo r each VLAN.
14-5 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 14 Configuring VTP Understanding VTP Figur e 14-1 Floodi ng T raffi c without VTP Pr uning Figure 14-2 shows a swi tched network w ith V T P pruni ng ena ble d.
14-6 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 14 Configuring VTP Conf igu rin g VTP VTP pruning is not designed to func tion in VTP transparent mode . If one or more switches in the netwo rk are in VTP transparen t mode, yo u should do on e of thes e: • T urn off VTP prun ing in the en tire network .
14-7 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 14 Configuring VTP Configuring VTP VTP Configuration Options Y o u can co nfigure VTP by using these co nfiguration mo des.
14-8 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 14 Configuring VTP Conf igu rin g VTP VTP Configuration Guidelines These sec tions descr ibe guid elines you should fol low when implem entin g VTP in your ne twork.
14-9 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 14 Configuring VTP Configuring VTP VTP Ve rs ion Foll ow these gui delines whe n deciding which VTP ver sion to im plement: • All switches in a VTP domain must run the same VTP versi on.
14-10 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 14 Configuring VTP Conf igu rin g VTP When you con figure a domain na me, it cannot be rem oved; you can only rea ssign a switc h to a different domain. T o retu rn the swi tch to a no-pa sswor d s tate, u se the no vtp password global co nfiguration c omman d.
14-11 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 14 Configuring VTP Configuring VTP This exam ple sh ows ho w to use VLA N configurat ion m ode to configure the sw.
14-12 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 14 Configuring VTP Conf igu rin g VTP Note Y ou ca n also configur e a VTP client by using th e vlan database p ri.
14-13 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 14 Configuring VTP Configuring VTP Note Y ou ca n also configure V TP transpare nt mode by using the vlan dat abas.
14-14 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 14 Configuring VTP Conf igu rin g VTP Enabling V TP Prunin g Pruning inc reases available bandwi dth by restric ting flood ed traffic to those trunk links th at the traffic must use to acces s the destinat ion devices.
14-15 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 14 Configuring VTP Configuring VTP Adding a VT P Client S witch to a VT P Domain Before adding a V TP clien t to a.
14-16 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 14 Configuring VTP Monito rin g VTP Monitoring VTP Y o u mon itor V TP by di sp layin g VT P configu ratio n in for matio n: th e dom ain name , the c ur rent V T P revision, and the n umb er of VL AN s.
C HAPTER 15-1 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 15 Configuring Voic e VLAN This ch apt er descr ibes how to configure the voice VLAN f eature on yo ur sw itch. V oice VLA N is re ferred to as an auxiliary VLAN in the Cata lyst 6000 f amily swi tch do cumentation.
15-2 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 15 C onfiguring Voice VLAN Configuring Voic e VL AN Figure 15-1 shows one way to conne ct a Cisco 7 960 IP Phone.
15-3 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 15 Configuring Voice VLA N Configuring Voice VLAN Voice V LAN Con figuration Guide lines These a re the v oic e VLAN con figu ration guid elines: • Y o u shou ld configu re voice VLA N on swi tch a cce ss port s.
15-4 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 15 C onfiguring Voice VLAN Configuring Voic e VL AN Configuring Ports to Carr y Voice Traffic in 802.1Q Frames Beginn ing in pri vileg ed EXEC mode, follo w thes e steps to conf igure a port to carry v oice traf fic in 802.
15-5 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 15 Configuring Voice VLA N Configuring Voice VLAN Overriding the CoS Pr iority of Incoming Data Frame s Y o u can conne ct a PC or o t her dat a device to a Cisco 7960 IP Phon e por t .
15-6 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 15 C onfiguring Voice VLAN Displa ying Vo ice VLA N Configuring the IP Phone to Tr ust the CoS Priority of Inc oming Data Frames Y o u can conne ct a PC or o t her dat a device to a Cisco 7960 IP Phon e por t .
C HAPTER 16-1 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 16 Configuring IGMP Sno oping an d MVR This cha pter d escribes h ow to configure In ternet Gr oup Ma nageme nt Prot ocol (IGM P) snoop ing on your switch, including an applicatio n of loca l IGMP snoopi ng, Multica st VLAN Re gistration (MVR).
16-2 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 16 Co nfiguring IGMP S noo ping and M VR Unders tan ding IGM P Snoo ping the switc h adds the host p ort numb er to the for wardin g table en try; when it recei ves an IGMP Lea v e Group message from a host, it remo ves the host port from the table entry .
16-3 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 16 Configuring IGMP Sno oping and M VR Understanding IGMP Snooping Figur e 16-1 Initial IGMP Join M essag e Router A se nds a genera l query to t he switc h, which f orwards the qu ery t o ports 2 thro ugh 5, a ll members of the same VLAN.
16-4 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 16 Co nfiguring IGMP S noo ping and M VR Unders tan ding IGM P Snoo ping Figur e 16-2 Second Hos t Joi ning a Multi.
16-5 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 16 Configuring IGMP Sno oping and M VR Configuring IGMP Snooping Note Y o u shou ld on ly u se the I mm ediat e- Leave proc essin g feat ure on V LANs wher e a si ng le h ost i s connect ed to each port.
16-6 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 16 Co nfiguring IGMP S noo ping and M VR Configuring IG MP Sn ooping Beginning i n privileged E X EC mo de , follow.
16-7 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 16 Configuring IGMP Sno oping and M VR Configuring IGMP Snooping Beginn ing in pr i vileged EXEC m ode, follo w t h.
16-8 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 16 Co nfiguring IGMP S noo ping and M VR Configuring IG MP Sn ooping T o rem ov e a mul ticast route r port f rom the VLAN, use the no ip igmp snooping vlan vlan- id mr outer interface inte rface-id global configurat ion comm and.
16-9 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 16 Configuring IGMP Sno oping and M VR Displaying IGMP Snooping Information Switch# show mac address-table multicast vlan 1 Vlan Mac Address Type Ports ---- ----------- ---- ----- 1 0100.
16-10 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 16 Co nfiguring IGMP S noo ping and M VR Displaying IG MP Sn ooping Informa tion This is an example of output from.
16-11 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 16 Configuring IGMP Sno oping and M VR Displaying IGMP Snooping Information This i s an exampl e of outp ut f rom .
16-12 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 16 Co nfiguring IGMP S noo ping and M VR Unde rs ta n din g Mu ltic as t V LAN Reg i stra t io n Understandin g Mu.
16-13 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 16 Configuring IGMP Sno oping and M VR Underst anding Multicast VLAN Registration When a subscriber chan ges channels or turns of f the tele vision, the set-to p box sends an IGMP leav e messag e for th e mult icast st ream.
16-14 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 16 Co nfiguring IGMP S noo ping and M VR Conf igu rin g MVR MVR elimin ates the need to duplicate tele vision-c h annel multi cast traf fic for subscribers in e ach VLAN.
16-15 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 16 Configuring IGMP Sno oping and M VR Configuring MVR MVR Configuration Guidelines and Limitations Foll ow these gui delines when conf iguring MV R: • Receiver ports cann ot b e t runk p ort s.
16-16 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 16 Co nfiguring IGMP S noo ping and M VR Conf igu rin g MVR T o return t he switch to its defa ult settin gs, use the no mvr [ mode | group ip-a dd ress | querytime | vlan ] global configurati on comm ands.
16-17 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 16 Configuring IGMP Sno oping and M VR Configuring MVR T o return the inter face to its default settings, u se the no mvr [ type | immediate | vl an vlan -id | gro up ] interf ace conf igu ration com mands.
16-18 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 16 Co nfiguring IGMP S noo ping and M VR Disp l ay in g MV R Info rma t ion This is an example of output fro m the show mvr interface privileged EXEC com mand whe n the member keyword is inc lud ed : Switch# show mvr interface fastethernet0/2 members 224.
16-19 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 16 Configuring IGMP Sno oping and M VR Con f ig u ri n g IG M P Fi lt e ri n g This is an example of output fro m the show mvr interface pri vile ged EXEC command for a specif ied interf ace: Switch# show mvr interface fastethernet0/2 224.
16-20 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 16 Co nfiguring IGMP S noo ping and M VR Conf igu ring I GMP Filt eri ng Configuring IGMP Profiles T o conf igure .
16-21 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 16 Configuring IGMP Sno oping and M VR Con f ig u ri n g IG M P Fi lt e ri n g This e xample show s how to crea te IGMP prof ile 4 allo wing access to the single IP multica st address and ho w to v erify t he conf iguration.
16-22 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 16 Co nfiguring IGMP S noo ping and M VR Conf igu ring I GMP Filt eri ng Setting th e Maximum Numbe r of IGMP Grou.
16-23 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 16 Configuring IGMP Sno oping and M VR Displaying IGMP Filtering Configuration Displaying IGMP Filtering Configura.
16-24 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 16 Co nfiguring IGMP S noo ping and M VR Displaying IGMP Filterin g Configura ti on.
C HAPTER 17-1 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 17 Configuring Port-Base d Traffic Control This chapte r des cribes how t o conf igure th e port-b ased traf fic contro l featur es on your switch .
17-2 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 17 Configuring Port-Based Traffic Co ntro l Configuring Stor m Control The rising t hresho ld is the p erce nt age of to tal a v a ilab le b andwi dth assoc iate d with m ultica st, broad cast, or unicast t raf fi c before forwarding is block ed.
17-3 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 17 Configuring Port -B ased Tra ffic Control Configuring Protected Ports Disabling Stor m Co nt rol Beginning i n p.
17-4 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 17 Configuring Port-Based Traffic Co ntro l Configuring Port Security T o disable prot ected p ort, use th e no switchport protected interface configurat ion comm and.
17-5 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 17 Configuring Port -B ased Tra ffic Control Confi guring Port Securi ty Secure MAC Addresses A secure port can have from 1 to 132 associ ated sec ure addre sses.
17-6 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 17 Configuring Port-Based Traffic Co ntro l Configuring Port Security If port sec urit y i s d isabl ed, the s ticky secur e M A C ad dresse s re ma in in t he r unnin g c onfigura tion.
17-7 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 17 Configuring Port -B ased Tra ffic Control Confi guring Port Securi ty Port Security Configuration Guidelines Foll ow these gui delines when co nfig uring port security: • Port security can only be config ured on static access ports.
17-8 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 17 Configuring Port-Based Traffic Co ntro l Configuring Port Security Step 6 switchport port-security violation { p.
17-9 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 17 Configuring Port -B ased Tra ffic Control Confi guring Port Securi ty T o retur n the inter fac e to the de fault conditi on as not a secure p ort, use the no switchport port -security interf ace co nf igurati on com mand.
17-10 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 17 Configuring Port-Based Traffic Co ntro l Configuring Port Security Switch(config-if)# switchport port-security mac-address 0000.
17-11 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 17 Configuring Port -B ased Tra ffic Control Confi guring Port Securi ty Beginn ing in pri vilege d EXEC mode, fol.
17-12 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 17 Configuring Port-Based Traffic Co ntro l Displaying Port-Base d Traffic Cont rol Settings Displaying Port-Based.
C HAPTER 18-1 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 18 Configuring UDLD This c hapt er d escri b es how to c onfigure the Un iDi rec tiona l Li n k De tect ion (UD LD) pr otoc ol o n y our switch.
18-2 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 18 Co nfiguring UDLD Unders tan ding UDL D UDLD oper ates b y using two mech anisms: • Neighbor datab ase mainten.
18-3 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 18 Configuring UD LD Configuring UDLD Configuring UDLD This se cti on de scri bes how to c onfigure UD LD o n your sw it ch.
18-4 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 18 Co nfiguring UDLD Conf igu ring U DLD Enabling UDL D Globally Beginn ing in pri vilege d EXEC mode, follo w thes.
18-5 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 18 Configuring UD LD Configuring UDLD T o disabl e UDLD on a no n-f ibe r- opti c inte rface , use the no udld enable interf ace conf igura tion comm an d.
18-6 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 18 Co nfiguring UDLD Displa ying U DLD Statu s Displaying UDLD Status T o display the UDLD stat us for the s pecif ied i nterf ace or for all interf aces, use the show udld [ interface-id ] pri vileged EX EC comm and.
C HAPTER 19-1 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 19 Configuring CDP This c hapt er d escrib es how to configure Cisc o Discovery Pro toco l ( CDP ) on your swi tch .
19-2 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapte r 19 Co nfigu ri n g CDP Conf igu rin g CD P Configuring CDP These sec tions inclu de CDP con figuration info rmatio.
19-3 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 19 Configuring CDP C onfiguring CDP Use the no form of the CDP commands to return to the def ault settings. This e xample sho ws how to confi gure an d veri fy CDP character istics .
19-4 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapte r 19 Co nfigu ri n g CDP Conf igu rin g CD P This example shows how to enable CDP if it has been di sabled .
19-5 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 19 Configuring CDP Monitoring and Maintaining CDP Monitoring and Maintaining CDP T o mon itor a nd mai ntai n CDP on yo ur device, per form one o r mor e of t hese ta sks, begi nnin g in privileged EXEC mo de .
19-6 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapte r 19 Co nfigu ri n g CDP Monito rin g and Mai nt aining CDP.
C HAPTER 20-1 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 20 Configuring SPAN and RSPAN This chapte r descr ibes ho w to co nf igure Switc hed Port Analyzer (SP AN) and Remote SP AN (RSP AN) on your switc h.
20-2 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 20 C onfiguring SPAN and RSPAN Understan din g SPA N and RSPAN Figur e 20-1 Example SP AN Configur ation Only traffic that ent ers or le aves source port s c an be mon i tore d by us ing SP AN.
20-3 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 20 Configuring SPAN and RSPAN Understandi ng SPAN and RS PAN SPAN and RS PAN Conc epts a nd Terminology This secti on descri bes conce pts and te rminology associate d with SP AN and RSP AN co nfiguration.
20-4 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 20 C onfiguring SPAN and RSPAN Understan din g SPA N and RSPAN Source Port A source port (als o called a monitor ed p ort ) is a switch ed port th at you mo nitor fo r network tra f fic analy sis.
20-5 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 20 Configuring SPAN and RSPAN Understandi ng SPAN and RS PAN • It can be a physical port that is ass ig ned to a n Ether Channel gr oup, even if the Et herChan nel grou p is specif ied a s a SP AN source.
20-6 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 20 C onfiguring SPAN and RSPAN Understan din g SPA N and RSPAN If a po rt is added to a mo nitored Ethe rChan nel gr oup, the new por t is a dded t o the SP AN sou rce por t list.
20-7 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 20 Configuring SPAN and RSPAN Configuring SPAN Configuring SPAN This sec tion d escribes h ow to configure SP AN on your switc h.
20-8 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 20 C onfiguring SPAN and RSPAN Configuring SPAN This exam ple shows how to set up a SP AN sessi on, s essi on 1 , for m oni tor ing s our ce p ort t raffi c to a destinati on port .
20-9 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 20 Configuring SPAN and RSPAN Configuring SPAN Removin g Ports from a SPAN Session Beginning in pr ivileged EXEC mo.
20-10 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 20 C onfiguring SPAN and RSPAN Configuring RSPAN Configuring RSPAN This secti on descri bes how to configure RSP AN on you r switc h.
20-11 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 20 Configuring SPAN and RSPAN Configuring RSPAN • Y o u shou ld cre ate a n RSP AN VL AN befo re c onfiguring a n RS P AN sou rce or de stina tion s ession .
20-12 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 20 C onfiguring SPAN and RSPAN Configuring RSPAN This example shows ho w to clear any existing RSP AN configur ati.
20-13 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 20 Configuring SPAN and RSPAN Configuring RSPAN This exampl e shows ho w to configure VLA N 901 as the sou rce rem.
20-14 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 20 C onfiguring SPAN and RSPAN Displaying SPAN and RS PAN Status Displaying SPAN and RSPAN Status T o display the statu s of the current SP AN or RSP AN configuratio n, use the show monitor pri vilege d EXEC co mmand.
C HAPTER 21-1 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 21 Configuring RMON This ch apter descr ibes how to con figure Remote Network Mo nitori ng (RMO N) on your swit ch.
21-2 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 21 Co n figuring RM ON Conf igu ring R MON Figur e 21 -1 Remot e Monit or i ng Example The switc h supports t hese .
21-3 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 21 Configuring RMON Confi guring RMON Default RMON Configuration RMON is disa bled by default ; no alarms or events are configured . Only RMON 1 is supp orted on the switch.
21-4 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 21 Co n figuring RM ON Conf igu ring R MON T o disable an al arm, use th e no rmo n alar m num ber global configura t ion com mand on e ach al arm you configured . Y ou c anno t disa ble at on ce a ll t he ala rms tha t yo u c on figured.
21-5 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 21 Configuring RMON Confi guring RMON Configuring RMON Collection on an Interface Y o u must first c onfigure RM ON al ar ms an d events to displa y co llec tion i nf orma tio n.
21-6 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 21 Co n figuring RM ON Displa ying RM ON Sta tus T o disabl e the co llecti on of g roup E thern et sta tistics , use th e no rmon collec tion stats index interf ace configurati on comm a nd.
C HAPTER 22-1 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 22 Configuring System Message Logg ing This c hapter d escrib es how to c onfigure system me ssage log ging on your sw itch.
22-2 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 22 Configuri ng System Me ssage Logging Configur ing System Mes sage Logg ing Configuring Sy stem Me ssage Logging .
22-3 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 22 Configuring Sys te m Message L ogging Config uring Syst em Message Logging This example shows a partial switch s.
22-4 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 22 Configuri ng System Me ssage Logging Configur ing System Mes sage Logg ing Disabling an d Enab ling Me ssage Lo gging Message logging is enab led by de fault. It must be enabled to send messages to any destination othe r than the conso le.
22-5 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 22 Configuring Sys te m Message L ogging Config uring Syst em Message Logging The logging buffered globa l configur ation comm and c opies l ogging messa ges to a n inte rnal buffer .
22-6 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 22 Configuri ng System Me ssage Logging Configur ing System Mes sage Logg ing Synchronizing Log M essages Y o u can.
22-7 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 22 Configuring Sys te m Message L ogging Config uring Syst em Message Logging T o disable syn chroni za t ion of un.
22-8 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 22 Configuri ng System Me ssage Logging Configur ing System Mes sage Logg ing Enabling a nd Disab ling Seq uence Nu.
22-9 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 22 Configuring Sys te m Message L ogging Config uring Syst em Message Logging Note Spe cifying a level c auses messages at that le v el an d numerical ly lo wer le v els to be displayed a t the destination.
22-10 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 22 Configuri ng System Me ssage Logging Configur ing System Mes sage Logg ing Limiting Syslog Messages Sent to the.
22-11 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 22 Configuring Sys te m Message L ogging 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 server , you m ust con figure the syslog daemon on a U N IX ser ver .
22-12 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 22 Configuri ng System Me ssage Logging Display ing the Log gi ng Configur ation T o remov e a syslog s erv er , use the no logging host globa l configurati on co mman d, and spe cify the syslog server IP address.
C HAPTER 23-1 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 23 Configuring SNMP This chapt er describ es ho w to configure the Sim ple Network Mana gement Prot ocol (SNM P) on your switch.
23-2 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 23 Configuring SNMP Unders tan ding SNMP • Using SNMP to Access MIB V ariables, page 23-4 • SNMP Notif ica tion.
23-3 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 23 Configuring SNM P Under standin g SNMP Y ou must co nfigure the SN MP agent to use the SNMP version support ed by the manage ment stat ion.
23-4 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 23 Configuring SNMP Unders tan ding SNMP SNMP Community String s SNMP comm unity stri ngs authent icate acc ess to MIB object s and functio n as embedde d passwords.
23-5 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 23 Configuring SNM P Configuring SNMP SNMP Notifications SNMP allo ws t he switch to send n otif ications to SNMP manager s when p articular ev ents occur . SNMP notifications ca n be sent as tr aps or inform request s.
23-6 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 23 Configuring SNMP Conf igu rin g SNMP Default SNMP Configuration T able 23-3 sh ows the de fault SNM P c onfigurat ion. SNMP Configuration Guidelines An SNMP gr oup is a table th at ma ps SNM P use rs to SN MP views.
23-7 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 23 Configuring SNM P Configuring SNMP Disabling the SNMP Agent Beginn ing in pr iv ileged EXEC mode, f ollo w these.
23-8 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 23 Configuring SNMP Conf igu rin g SNMP Note T o disabl e acce ss for an SNM P commun ity , set th e comm unity string for that co mmunity to the null string (do not enter a value for th e communi ty string ).
23-9 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 23 Configuring SNM P Configuring SNMP Beginn ing in pri vileg ed EXEC mode, follo w these st eps to confi gure SNMP on the switch: Command Purpo se Step 1 c onfigure te rmina l Enter global configurat ion mode .
23-10 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 23 Configuring SNMP Conf igu rin g SNMP Configuring SNMP Notifications A trap manag er is a mana geme nt statio n that recei ves and pro cesses tr aps. T rap s are sys tem alerts that the switc h gener ates whe n cert ain events occu r .
23-11 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 23 Configuring SNM P Configuring SNMP Some noti fication type s can not be c ontr olled wi th the sn mp-se rver ena ble globa l configurati on comm an d, for exampl e, tty a nd udp-port .
23-12 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 23 Configuring SNMP Conf igu rin g SNMP The snmp-serv er host co mmand s pecif ies which ho sts rec eiv e th e noti fica tions. T he snmp-serv er enab le trap command global ly enable s the mech anism for the specif ied notif icatio n (for tra ps and informs ).
23-13 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 23 Configuring SNM P Configuring SNMP Setting th e Agent C ontact and Location In formation Beginn ing in pri vile.
23-14 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 23 Configuring SNMP Conf igu rin g SNMP SNMP Examp les This example shows ho w to enable all versions of SN MP . Th e configurati on permi ts any SNMP manager to access all objects with read-only permissions using the co mmunity string public .
23-15 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 23 Configuring SNM P Disp la yin g S N M P S t at us Displaying SNMP Status T o display SN M P input and o utput s.
23-16 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 23 Configuring SNMP Displaying SNM P Status.
C HAPTER 24-1 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 24 Configuring Network Security with ACLs This cha pter d escri bes how to configu re net work se curit y on yo ur swi tch by usi ng a cce ss contr ol l ists (A CL s), whic h are also ref erred to in comm ands an d tables as acce ss lists .
24-2 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 24 Con figuring Ne two rk Sec urity with ACLs Unders tandin g A CLs Understandin g ACLs Pack et f ilterin g can limit net work traff ic and restrict netw ork use b y certain users or de v ices.
24-3 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 24 Configuring Net work Securi t y with ACLs Unde rsta ndi n g AC Ls Figur e 24-1 Usi ng AC Ls to Contr ol T raff ic t o a Netw or k Handling Fragmented and Unfragmented Traffic IP packets can be fragment ed as they cross the ne twork.
24-4 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 24 Con figuring Ne two rk Sec urity with ACLs Unders tandin g A CLs • Packet A is a TCP pa cket fro m ho st 10. 2. 2.2, po rt 65000 , go ing to h ost 10.1. 1.1 on th e SMTP por t.
24-5 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 24 Configuring Net work Securi t y with ACLs Unde rsta ndi n g AC Ls • Layer 4 fields: – TCP (Y ou c an sp eci fy a T CP so urce , de stin ation po rt n um ber, or both a t the same time.
24-6 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 24 Con figuring Ne two rk Sec urity with ACLs Conf igu ring A CLs Guidelines for Applying ACLs to Physical Interfaces When ap plyi ng ACLs to physic al in terfaces , f oll ow these configura tion g uide lines: • Only one A C L can be attached to an interface .
24-7 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 24 Configuring Net work Securi t y with ACLs Confi guring ACLs Unsupporte d Features The switc h does not support t.
24-8 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 24 Con figuring Ne two rk Sec urity with ACLs Conf igu ring A CLs ACL Numbers The numbe r you use to denote your A CL shows the type of access list th at you ar e cre ating.
24-9 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 24 Configuring Net work Securi t y with ACLs Confi guring ACLs Creating a Numbered Standard ACL Note For info rmati.
24-10 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 24 Con figuring Ne two rk Sec urity with ACLs Conf igu ring A CLs This exampl e shows ho w to creat e a standard ACL to deny access to IP host 171 .69.1 98.102, pe rmit access to an y others, and display the results.
24-11 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 24 Configuring Net work Securi t y with ACLs Confi guring ACLs Note Th e switc h does not supp ort dyna mic or reflexive access lis ts. It al so does n ot suppor t filtering based on the min imize -mon eta ry-co st typ e of servic e (T oS ) bit.
24-12 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 24 Con figuring Ne two rk Sec urity with ACLs Conf igu ring A CLs Beginn ing in pri vileg ed EXEC mode, follo w these st eps to create an exte nded A CL: Command Purp ose Step 1 co nfi gure terminal Ent er g loba l c onfigura tion m od e.
24-13 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 24 Configuring Net work Securi t y with ACLs Confi guring ACLs Use the no a ccess-lis t a ccess-list-number gl obal conf igurat ion command to dele te the entire access list.
24-14 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 24 Con figuring Ne two rk Sec urity with ACLs Conf igu ring A CLs Be ginning in pri vile ged EXEC m ode, fo llo w .
24-15 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 24 Configuring Net work Securi t y with ACLs Confi guring ACLs When ma king t he stan dar d an d extend ed A CL, r.
24-16 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 24 Con figuring Ne two rk Sec urity with ACLs Conf igu ring A CLs T o remov e a conf igu red time -ran ge, use the no time-r ange ti me-range-nam e globa l c onfigura tion comm and.
24-17 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 24 Configuring Net work Securi t y with ACLs Confi guring ACLs deny tcp any any time-range new_year_day_2000 (inac.
24-18 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 24 Con figuring Ne two rk Sec urity with ACLs Conf igu ring A CLs In this exam ple, the Jones subnet is not allo w.
24-19 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 24 Configuring Net work Securi t y with ACLs Confi guring ACLs This exam ple sh ows how to cr eate an d displ ay a n acc ess l ist name d mac1 , denying o nl y E the rT yp e DECnet Phase IV traf f ic, b ut permitting all other types of traf f ic.
24-20 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 24 Con figuring Ne two rk Sec urity with ACLs Applying ACLs to Ter m in al Lines or Phy sical Inter faces Applying.
24-21 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 24 Configuring Net work Securi t y with ACLs Displaying ACL Information Applying ACLs to a Physical Interface Begi.
24-22 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 24 Con figuring Ne two rk Sec urity with ACLs Displa ying A CL Inf ormati on Displaying ACLs Y ou ca n display existi ng A CLs by using show commands.
24-23 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 24 Configuring Net work Securi t y with ACLs Examples for Compiling ACLs Displaying A ccess Groups Note Th is fea ture is available o nly i f your sw itch i s r unn ing the EI .
24-24 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 24 Con figuring Ne two rk Sec urity with ACLs Examples fo r Compilin g ACLs Use swi tch A CLs to d o these: • Create a standa rd A CL, and filter traff ic fr om a spe cific Interne t host with an addre ss 172.
24-25 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 24 Configuring Net work Securi t y with ACLs Examples for Compiling ACLs Numbered ACL Examples This example shows that the swi tch accept s addre sses on networ k 36.
24-26 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 24 Con figuring Ne two rk Sec urity with ACLs Examples fo r Compilin g ACLs In this ex ample o f a num bered A CL,.
C HAPTER 25-1 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 25 Configuring QoS This chapter descr ibes ho w to conf igure quality of service (QoS) b y using QoS com mands. W ith QoS, you can p rovid e preferen tial treatm ent to cert ain types of traf fi c at the e xpense o f others.
25-2 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapt e r 2 5 Co nf igur ing Q oS Unders tan ding QoS • V ideo w izard — Giv es traff ic th at origin ates from speci fied video servers a highe r priori ty than the prior ity of data t raf f ic.
25-3 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 25 Configuring Qo S Under sta n din g Q oS Figur e 25-1 QoS Cl assificatio n Lay ers in F ram es and P ack ets All .
25-4 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapt e r 2 5 Co nf igur ing Q oS Unders tan ding QoS • Markin g e va luates the policer an d conf iguration info rmation.
25-5 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 25 Configuring Qo S Under sta n din g Q oS The trust DSCP con figur ation is meaningless fo r non-IP traf f ic.
25-6 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapt e r 2 5 Co nf igur ing Q oS Unders tan ding QoS Classification Based on Class Maps and Policy Map s A class map is a mechanism th at you use to isol ate and n ame a specif ic tr af fic flo w (or clas s) from all other traf f ic.
25-7 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 25 Configuring Qo S Under sta n din g Q oS • Only one policer can be applied to a pack et in the input direc tion. • Only t he a verag e rate and com mitted b urst parameter s are co nf igurable.
25-8 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapt e r 2 5 Co nf igur ing Q oS Unders tan ding QoS Port Prior ity Frames rec ei ve d from users in the adminis trati v ely-def ined VLANs are clas sif ied or tagge d for transmission to other de vices.
25-9 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 25 Configuring Qo S Configur ing Qo S Configuring QoS Before configur ing QoS, you must hav e a thoroug h understand ing of the se items: • The type s of applica tions used and the traffic patterns on yo ur network.
25-10 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapt e r 2 5 Co nf igur ing Q oS Conf igu rin g QoS Configuration Guidelines Note Th ese guide lines are applicab le only if you r switch is ru nning the E I.
25-11 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 25 Configuring Qo S Configur ing Qo S Note Both the EI a nd SI support this featur e. Configuring the Trust State on Po rts within the QoS Domain Pa ckets en tering a QoS domai n are classi fied at the edge of the QoS dom ain.
25-12 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapt e r 2 5 Co nf igur ing Q oS Conf igu rin g QoS Beginn ing in pr iv ilege d EXEC mode, follo w the se steps to conf i.
25-13 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 25 Configuring Qo S Configur ing Qo S Configuring the CoS Val ue for an Interface QoS assigns the CoS v al ue specif ied with the mls qos cos interfac e conf igu ration c ommand to unta gged frames re ceived on trusted and untrust ed port s.
25-14 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapt e r 2 5 Co nf igur ing Q oS Conf igu rin g QoS Ho we ver , if a user byp asses the telep hone and c onnects th e PC .
25-15 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 25 Configuring Qo S Configur ing Qo S Enabling Pass-Through Mode In software rel eases earl ier than Re lease 12.
25-16 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapt e r 2 5 Co nf igur ing Q oS Conf igu rin g QoS Configuring a QoS Policy Note Th is fea ture is available o nly i f your sw itch i s r unn ing the EI .
25-17 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 25 Configuring Qo S Configur ing Qo S For more information abo ut creating IP standar d A CLs, see the “ Guidelin es f or A pplying ACLs to Physica l Interfa ces ” section on page 24-6 .
25-18 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapt e r 2 5 Co nf igur ing Q oS Conf igu rin g QoS Beginn ing in pri vileg ed EXEC mode, follo w the se steps to create an IP exte nded A CL for IP tra ff ic: Command Purpose Step 1 conf igure t erminal Enter g lo bal c onfigurat ion m ode.
25-19 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 25 Configuring Qo S Configur ing Qo S For more information about crea ting IP exten ded A CLs, see the “ Guidelines for Applyi ng A CLs to Physica l Interfa ces ” section on page 24-6 .
25-20 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapt e r 2 5 Co nf igur ing Q oS Conf igu rin g QoS This e xample sho ws ho w to cr eate a Lay er 2 MA C A CL wit h a permit s tatement. Th e statem ent allo ws traff ic from the host wi th MA C address 0001.
25-21 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 25 Configuring Qo S Configur ing Qo S T o delete an exi sting class ma p, u se the no class-map cl ass-map- name gl obal conf igur ati on com man d.
25-22 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapt e r 2 5 Co nf igur ing Q oS Conf igu rin g QoS Beginning in privileged EX EC mode , follow these steps t o create a po licy map: Command Purpose Step 1 conf igure t erminal Enter g lo bal c onfigurat ion m ode.
25-23 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 25 Configuring Qo S Configur ing Qo S T o delete an e xisting polic y map, use the no policy-map poli cy-m ap-n ame global configuration comm and. T o de lete an existi ng class ma p, use the no clas s class-map-nam e poli cy-map co nfigurati on comma nd.
25-24 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapt e r 2 5 Co nf igur ing Q oS Conf igu rin g QoS Switch(config)# access-list 1 permit 10.
25-25 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 25 Configuring Qo S Configur ing Qo S Configuring the CoS-t o-DSCP Map Y ou use the CoS- to-DSCP ma p to map CoS v alues in incomin g pack ets to a DSCP v alu e that Qo S uses internall y to rep resent the priority o f the tr af fic .
25-26 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapt e r 2 5 Co nf igur ing Q oS Conf igu rin g QoS Configuring the DSCP-to- CoS Map Y o u use the DSCP- to-CoS ma p to map DSCP values in incom ing pac kets to a Co S value, which is used to sele ct one of the fou r egress queues .
25-27 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 25 Configuring Qo S Configur ing Qo S Config ur ing Co S an d WRR Note Th is feature is supported by both the EI and SI.
25-28 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapt e r 2 5 Co nf igur ing Q oS Displa ying QoS Infor mation T o di sable th e WRR sche dule r an d ena ble th e st rict pri ori ty sc he du ler, use the no wrr -queue bandwidth globa l configuration command.
25-29 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 25 Configuring Qo S QoS Config uratio n Examples QoS Configuration Exa mples Note These ex amples are applicab le only i f your switc h is run ning the EI .
25-30 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapt e r 2 5 Co nf igur ing Q oS QoS Configura tion Examp les QoS Configuration for the Existing Wiring Closet The exi sting wiring closet in Figure 25-4 consi sts of existing Ca talyst 290 0 X L and 3500 X L switche s.
25-31 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 25 Configuring Qo S QoS Config uratio n Examples Step 9 police 5000000 819 2 exce ed-ac tion drop Def ine a p olicer f or the classi fie d vide o traf f ic to drop tr af fic that exc eeds 5-Mb ps a v erag e tra f f ic rat e with an 81 92-b y te b u rst size .
25-32 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapt e r 2 5 Co nf igur ing Q oS QoS Configura tion Examp les.
C HAPTER 26-1 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 26 Configuring EtherChannels This cha pter descri bes how to configure Ether Channel on Layer 2 interfaces. EtherCha nnel provi des fault-to lerant high- speed links betw een switc hes, ro uters, and ser vers.
26-2 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 2 6 Configur ing Ethe rChannel s Unders tan ding Ether Channels Figur e 26-1 T ypical EtherChannel Con figur ation Each Et h erCha nne l ca n co ns is t of up to eigh t com pa tib ly configur ed Ethe rn et i nte rface s.
26-3 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 26 Configuring Eth erCh annels Understa nding Et herChann els Figur e 26-2 Relation ship of Ph ysical P or ts, Lo g.
26-4 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 2 6 Configur ing Ethe rChannel s Unders tan ding Ether Channels PAgP Modes T able 26-1 sh ows the user-configurab le Ethe rC han nel mode s f or the channel-group interfa ce configurati on comm a nd: on , auto , and desi r abl e .
26-5 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 26 Configuring Eth erCh annels Understa nding Et herChann els Physical Learners an d Aggregate-P ort Learners Network devices are cla ssified as P AgP physic al lea rner s o r a ggregate- por t l ear ne rs.
26-6 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 2 6 Configur ing Ethe rChannel s Unders tan ding Ether Channels Use the option tha t provi des the greatest v ariety in your conf iguration.
26-7 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 26 Configuring Eth erCh annels Co nfiguri ng Ether Chann els Configuring Eth erChannels These sec tions descr ibe h.
26-8 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 2 6 Configur ing Ethe rChannel s Configur ing Eth erChann els EtherChann el Configuratio n Guidelin es If improperly co nf igured, some EtherCh annel interf aces are automatic ally disabled to a v oid network loops and ot her pr oblems.
26-9 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 26 Configuring Eth erCh annels Co nfiguri ng Ether Chann els Beginn ing in pri vileg ed EXEC mode, follo w these st.
26-10 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 2 6 Configur ing Ethe rChannel s Configur ing Eth erChann els T o remove an inte rface from the Et herC hannel group, u se the no channel-group interface co nfiguration comm and.
26-11 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 26 Configuring Eth erCh annels Displa ying Ethe rChannel and PAgP St atus T o ret urn EtherCh annel load balancing to the d efault c onfig uration, u se the no port-channel load-balanc e global con figurati on comm and.
26-12 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 2 6 Configur ing Ethe rChannel s Displaying Eth erCh annel and PA gP Status.
C HAPTER 27-1 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 27 Troubleshooting This chapte r describes ho w to identify and resolv e software prob lems related to the IOS softwa re.
27-2 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 27 Trouble shooting Using Re covery Procedu res Recovering from Corru pted Softw are Switch software can be cor ru pted du ring an up grade , by downloadin g the wr ong file to the swi tch, and by d eleting the im age f ile.
27-3 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 27 Troublesho oti ng Using Reco very Pr ocedures Step 4 Press the Mode button, and at th e same time, reconnect the pow er cord to the switch. Y o u can re le ase th e Mode button a second or two af ter the LE D above port 1X goes off.
27-4 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 27 Trouble shooting Using Re covery Procedu res Step 13 Copy the c onfiguration file into memory: switch# copy flash: config.text system: running-config Source filename [config.
27-5 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 27 Troublesho oti ng Using Reco very Pr ocedures Replacing a Failed Command Switch with a Cluster Member T o replac.
27-6 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 27 Trouble shooting Using Re covery Procedu res Step 11 Respond to the questions in the setup program. When prom pted for t he host n ame, reca ll that on a comman d switch, the host nam e is limite d to 28 charac ters; on a member switch to 31 character s.
27-7 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 27 Troublesho oti ng Using Reco very Pr ocedures Basic management setup configures only enough connectivity for man.
27-8 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 27 Trouble shooting Preventing Autone gotiati on M ismatche s Preventing Autone gotiation Mismatc hes The IEE E 802.
27-9 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 27 Troublesho oti ng Using Debug C ommands Cautio n Beca use de bu gging output is assi gned hi gh pri orit y in the CP U proces s, it can re nder the sys tem unusab le.
27-10 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter 27 Trouble shooting Using t he c rashinfo File The no debug al l privileged EXEC comm and di sables all diagnost ic output . Using t he no debug all comm and is a convenient way to ensure th at you have not accide ntally l eft any debug co mmand s enab led.
C HAPTER A-1 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 A Supported MIBs This appendix l ists the supp orted mana gement i nformat ion base (M IBs) for this re lease.
A- 2 Catalyst 2950 Desktop Switch Software C onfiguratio n Guide 78-11380-05 Chapter A Supported MIBs Using FTP t o Acces s the MIB Fi le s • CISCO-VL AN-MEMB ERSHIP-M IB • CISCO-VTP-MIB • ENTI .
IN-1 Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-11380-05 INDEX Numerics 802.1 D See STP 802.1 Q and trunk ports 9-3 config urati on limitat ions 13-16 nati ve VL AN fo r un tagge d tr affic 13-20 trunk m ode 3-8 802.1 S See MSTP 802.
Index IN-2 Catalyst 2950 Desktop Switch Software C onfigurati on Guide 78-11380-0 5 ACLs ( continue d) exten ded I P configuring for QoS classi fication 25-18 crea ting 24-10 matc hing cri teria 24-7 .
Inde x IN-3 Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-11380-05 alarm s, RM ON 21-3 allowed-V LAN list 13-19 Apply button 3-27 ARP table address resolution 7-59 managing 7-59 attri.
Index IN-4 Catalyst 2950 Desktop Switch Software C onfigurati on Guide 78-11380-0 5 BPDU guard describe d 12-3 enab lin g 12-15 support fo r 1-3 broa dcas t stor m cont rol config uring 17-1 disabling.
Inde x IN-5 Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-11380-05 CLI (co ntinue d) history chan ging t he b uff er si z e 2-5 describe d 2-5 disabling 2-6 recal ling co mman ds 2-5 .
Index IN-6 Catalyst 2950 Desktop Switch Software C onfigurati on Guide 78-11380-0 5 CMS (c onti nued) online help 3-25 requir ements 3-28 saving co nfig uration ch ange s 3-30 toolbar 3-19 tool tips 3.
Inde x IN-7 Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-11380-05 convent ions comm and xxvi for ex amples xxvi text xxvi CoS config uring 25-7 configurin g priority queues 25-27 def.
Index IN-8 Catalyst 2950 Desktop Switch Software C onfigurati on Guide 78-11380-0 5 device ic ons Front Pane l vie w 3-5 Topolog y v iew 3-11 device la bels 3-12 Devi ce Mana ger 3-2 See also Swi tch .
Inde x IN-9 Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-11380-05 error ch ecking, CMS 3-30 erro r me ssag es during co mman d entry 2-4 setting the display destinati on device 22-4 .
Index IN- 10 Catalyst 2950 Desktop Switch Software C onfigurati on Guide 78-11380-0 5 Front Pane l vie w clu ster t ree 3-5 comm an d sw it ch 3-4 describe d 3-4 pop- up me nus 3-20 port ic ons 3-6 po.
Inde x IN- 11 Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-11380-05 icons (co ntinue d) editab le table cell 3-27 Front Pane l vie w 3-6 multilink 3-21 sorting 3-27 toolbar 3-19 Topo.
Index IN- 12 Catalyst 2950 Desktop Switch Software C onfigurati on Guide 78-11380-0 5 interfac es (continue d) supported 9-4 types of 9-1 interf aces rang e macro co mmand 9-8 inventor y, cluster 6-25.
Inde x IN- 13 Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-11380-05 link l abels 3-12 link pop-up me nu, To pology vi ew 3-21 links, unidirec tional 18-1 lists, CMS 3-27 login a uthe.
Index IN- 14 Catalyst 2950 Desktop Switch Software C onfigurati on Guide 78-11380-0 5 menu bar describe d 3-14 variatio ns 3-14 messages system 3-18 to user s thr ou gh banne rs 7-49 metrop olitan- ar.
Inde x IN- 15 Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-11380-05 MSTP (c onti nued) exten ded s y st em I D affec ts on ro ot sw itch 11-14 affec ts on se conda ry r oot s wit ch 11-16 unexpec ted b ehavio r 11-14 interface stat e, blocking t o forwardi ng 12-2 interoper ability with 802.
Index IN- 16 Catalyst 2950 Desktop Switch Software C onfigurati on Guide 78-11380-0 5 network e xample s collapse d back bone an d switch clust er 1-12 design co ncepts cost -effec tiv e wiri ng clo s.
Inde x IN- 17 Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-11380-05 PC (passi ve comman d switch) 6-13, 6-24 per-V LAN Spanni ng Tree (PV ST) 10-2 per-V LAN Span ning Tree+ (PVST+) 1.
Index IN- 18 Catalyst 2950 Desktop Switch Software C onfigurati on Guide 78-11380-0 5 port po p-u p me nu, Fr ont Pane l v iew 3-20 port priority MSTP 11-17 STP 10-15 ports 802.
Inde x IN- 19 Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-11380-05 QoS (conti nued) classifica tion (continued) trusted bou ndary , describ ed 25-13 trusted CoS, descri bed 25-4 typ.
Index IN- 20 Catalyst 2950 Desktop Switch Software C onfigurati on Guide 78-11380-0 5 RADIUS (c ontinued) in clusters 6-18 limiting the services to the user 7-26 method lis t, defi ned 7-19 operati on.
Inde x IN- 21 Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-11380-05 RSPAN (continued ) displaying sta tus 20-14 interactio n with other featur es 20-5 monitore d ports 20-4 monit ori.
Index IN- 22 Catalyst 2950 Desktop Switch Software C onfigurati on Guide 78-11380-0 5 SNM P (co ntin ued) config urati on exam ples 23-14 default conf igur ati on 23-6 groups 23-8 in clusters 6-17 inf.
Inde x IN- 23 Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-11380-05 static access ports assigni ng to VLAN 13-11 defined 9-2, 13-3 static addre sses See ad dresses static VLAN memb ership 13-2 statistics 802.
Index IN- 24 Catalyst 2950 Desktop Switch Software C onfigurati on Guide 78-11380-0 5 STP (continued) load sharing overvi ew 13-21 using pa th cost s 13-23 using port priori ties 13-21 loop gu ar d de.
Inde x IN- 25 Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-11380-05 system messa ge logging (c ontinued ) UNIX sysl og se rver s configur ing the daemon 22-11 configurin g the loggin.
Index IN- 26 Catalyst 2950 Desktop Switch Software C onfigurati on Guide 78-11380-0 5 TOS 1-4 traffic frag mented 24-3 unfragm ented 24-3 traffic polic ing 1-5 transp arent m ode, VTP 14-3, 14-12 trap.
Inde x IN- 27 Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-11380-05 VLAN c onfi gur ation at bootu p 13-7 saving 13-7 VLAN c onfi gurat ion m ode 2-2, 13-6 VLAN database and st artup.
Index IN- 28 Catalyst 2950 Desktop Switch Software C onfigurati on Guide 78-11380-0 5 voice VLAN (continued) configurin g ports for voice traffic in 802.
Inde x IN- 29 Catalyst 2950 Desktop Switch Software Conf igurati on Guide 78-11380-05 WRR config uring 25-27 defining 25-8 descript ion 25-8 X XMOD EM pr otoc ol 27-2.
Index IN- 30 Catalyst 2950 Desktop Switch Software C onfigurati on Guide 78-11380-0 5.
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