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MMAC-Plus ™ 9T122-24 Three Port Token Ring MicroLAN ™ Switch Module User’s Guide.
i Notice Notice Cabletron Systems r eserves the right to make changes in specifications and other information contained in this document without prior notice. The reader should in all cases consult Cabletr on Systems to determine whether any such changes have been made.
ii Notice FCC Notice This device complies with Part 15 of the FCC rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference r eceived, including interference that may cause undesir ed operation.
iii Notice DOC Notice This digital apparatus does not exceed the Class A limits for radio noise emissions fr om digital apparatus set out in the Radio Interference Regulations of the Canadian Department of Communications.
v Contents Chapter 1 Intr oduction Features........................................................................................................................... 1-1 Related Manuals ................................................................
1-1 Chapter 1 Intr oduction The 9T122-24 MicroLAN™ Switch Module, shown in Figur e 1-1, is a three port T oken Ring bridge and router module. This module supports either one token ring with twenty four HUB connections, or two separate T oken Rings with twelve HUB connections, and an interface to the FNB backplane.
Introduction 1-2 Management Information Base (MIB) Support The 9T122-24 module provides MIB support including: • IETF MIB II (RFC 1213) • IETF RMON MIB (RFC 1271 and 1513) • IETF Bridge MIBs (RFC 1493 and 1525) • IEEE 802.
1-3 F eatures Figure 1-1. The 9T122-24 MicroLAN Module 1 2 16 Mb MMAC PLUS.
Introduction 1-4 Related Manuals The manuals listed below should be used to supplement the procedur es and technical data contained in this manual. MMAC-Plus Installation Guide MMAC-Plus Operations Gu.
2-1 Chapter 2 Installation Installing the Micr oLAN Module The MMAC-Plus MicroLAN Module may be installed into any of the 14 slots that are available. T o install, follow the steps below: 1. Switch off the power supplies and r emove all power from the MMAC-Plus chassis.
Installation 2-2 Figure 2-1. Installing the MicroLAN Module 7 FLNK 8 FLNK FLNK 10 FLNK INS 11 FLNK INS 12 RX TX RX TX RX Circuit Card Card Guides Metal Back-Panel Jack for ESD wrist strap W arning: Ensure that the circuit card is between the card guides .
2-3 The Reset Switch The Reset Switch The Reset switch is located on the front panel, under the top plastic tab as shown in Figure 2-2. It serves two functions: • Pressing the r eset switch twice within three seconds causes the pr ocessor (i960) to reset.
Installation 2-4 User Accessible Components Figure 2-3 shows the various components that ar e accessible to the user . These consist of an eight position dip switch (explained in the next section), replaceable PROMs and sockets for RAM. These will be used for future upgrades.
2-5 Setting the Module Card DIP Switch Setting the Module Car d DIP Switch An eight switch DIP switch is located on the module car d as shown in position 8 in Figure 2-3 and in Figur e 2-4. The function of the switches are listed in T able 2-1. Figure 2-4.
Installation 2-6 See the Cautions at the end of this table. T able 2-1. Function of DIP Switch Switch Function Description 8 Clear Password 1 When toggled, this switch clears user-enter ed passwords stor ed in NVRAM, and restor es the default passwords.
2-7 Ring Speed Ring Speed The module defaults to a 16Mbps ring speed on all rings. This may be changed though local management. Multi-Ring Out Capability Any port of the module may be configured as a ring-out port thr ough management software.
3-1 Chapter 3 Operation The 9T122-24 MicroLAN Module pr ovides connectivity between the front panel T oken Ring(s) and the FDDI rings on the backplane (FNB-1 or FNB-2). MMAC-Plus modules connect to either the Internal Network Bus (INB) or the Flexible Network Bus (FNB) bus.
Operation 3-2 T ransparent Bridging T ransparent Bridging is accomplished by building a Sour ce Address T able (SA T) from sour ce MAC/physical addresses and using the SA T to make forwarding decisions.
3-3 Bridging 2. The receiving bridges append their own r oute information to the Route Information Field (RIF) in the MAC frame header and transmit the frame again. 3. Eventually , the original source device receives all of the ARE r eplies from the other end stations on the network.
Operation 3-4 Fle xible Netw ork Bus (FNB) The FNB consists of two dual FDDI networks, the FNB-1 and FNB-2, providing up to 400 Mbps of data bandwidth. These FDDI networks are 100% ANSI FDDI-compliant supporting SMT (version 7.3), MAC, PHY , and PMD standards.
3-5 System Diagnostic Controller System Diagnostic Contr oller This diagnostic controller is composed of a Z-80 micr oprocessor and it’s supporting logic.
4-1 Chapter 4 LANVIEW LEDs The front panel LANVIEW LEDs, shown in Figur e 4-1, indicate the status of the module and may be used as an aid in troubleshooting.
LANVIEW LEDs 4-2 The functions of the two System Status LEDs, System Management Bus (SMB) and the CPU, are listed in T able 4-1. The function of the FNB receive LED is listed in T able 4-2. The function of the FNB transmit LED is listed in T able 4-3.
4-3 The function of the T oken Ring Mac receive LEDs ar e listed in T able 4-4. The function of the T oken Ring Mac transmit LEDs are listed in T able 4-5.
LANVIEW LEDs 4-4 The function of the T oken Ring speed LEDs is listed in T able 4-7. T able 4-7. T oken Ring Speed LED Color State Yellow 16 Mbs Off 4 Mps.
5-1 Chapter 5 Specifications Safety This equipment meets the safety requir ements of: • UL 1950 • CSA C22.2 No. 950 • EN 60950 • IEC 950 • EMI Requirements of FCC Part 15 Class A • EN 550.
Specifications 5-2 Ph ysical Dimensions: 35.0 D x 44.0 H x 3.0 W centimeters (13.8 D x 17.4 H x 1.2 W inches) W eight: Unit: 1.36 kg. (3lb) Shipping: 1.
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