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Cabletron Systems MMAC-Plus 9T122-24 User Manual

Three port token ring microlan switch module
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MMAC-Plus
9T122-24
Three Port Token Ring
™
MicroLAN
Switch Module
User's Guide

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Summary of Contents for Cabletron Systems MMAC-Plus 9T122-24

  • Page 1 ™ MMAC-Plus 9T122-24 Three Port Token Ring ™ MicroLAN Switch Module User’s Guide...
  • Page 2 Notice Notice Cabletron Systems reserves the right to make changes in specifications and other information contained in this document without prior notice. The reader should in all cases consult Cabletron Systems to determine whether any such changes have been made.

  • Page 3: Fcc Notice

    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 received, including interference that may cause undesired operation. NOTE: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC rules.

  • Page 4: Doc Notice

    Notice DOC Notice This digital apparatus does not exceed the Class A limits for radio noise emissions from digital apparatus set out in the Radio Interference Regulations of the Canadian Department of Communications. Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites applicables aux appareils numériques de la class A prescrites dans le Règlement sur le brouillage radioélectrique édicté...

  • Page 5: Table Of Contents

    Chapter 2 Installation Installing the MicroLAN Module ... 2-1 The Reset Switch ... 2-3 User Accessible Components ... 2-4 Setting the Module Card DIP Switch ... 2-5 Ring Speed ... 2-7 Multi-Ring Out Capability... 2-7 Chapter 3 Operation Bridging ... 3-1 Transparent Bridging...

  • Page 6: Chapter 1 Introduction

    Introduction The 9T122-24 MicroLAN™ Switch Module, shown in Figure 1-1, is a three port Token Ring bridge and router module. This module supports either one token ring with twenty four HUB connections, or two separate Token Rings with twelve HUB connections, and an interface to the FNB backplane.
  • Page 7 A telnet session can be set up with the module to provide access to the Local Management screens. LANVIEW LEDs The 9T122-24 use LANVIEW – the Cabletron Systems built-in visual diagnostic and status monitoring system. With LANVIEW LEDs, you can quickly identify the device, port, and physical layer status at a glance.
  • Page 8 T O K E N R I N G 9T122-24 16 Mb MMAC PLUS Figure 1-1. The 9T122-24 MicroLAN Module Features...

  • Page 9: Related Manuals

    MMAC-Plus Local Management User’s Guide Getting Help If you need additional support with the MMAC-Plus, or if you have any questions, comments or suggestions concerning this manual, feel free to contact Cabletron Systems Technical Support: By phone: By CompuServe: By Internet mail:...

  • Page 10: Chapter 2 Installation

    Electrostatic Discharge (ESD). Carefully examine the module, checking for damage. If any damage exists, DO NOT install the module. Contact Cabletron Systems Technical Support immediately. The modules are installed into the chassis by sliding them into slots and locking down both the top and bottom plastic tabs, as shown in Figure 2-1.
  • Page 11 Installation Metal Back-Panel Warning: Ensure that the circuit card is between the card guides. Lock down the top and bottom plastic tabs at the same time, applying even pressure. Figure 2-1. Installing the MicroLAN Module FLNK FLNK FLNK FLNK FLNK Jack for ESD wrist strap Circuit Card...

  • Page 12: 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 reset switch twice within three seconds causes the processor (i960) to reset.

  • Page 13: User Accessible Components

    User Accessible Components Figure 2-3 shows the various components that are 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.

  • Page 14: Setting The Module Card Dip Switch

    Setting the Module Card DIP Switch Setting the Module Card DIP Switch An eight switch DIP switch is located on the module card as shown in position 8 in Figure 2-3 and in Figure 2-4. The function of the switches are listed in Table 2-1.
  • Page 15 See the Cautions at the end of this table. Switch 1. Caution: Do not toggle Switch 8 unless you intend to reset the user configured passwords to their factory default settings. 2. Caution: Do not toggle Switch 7 unless you intend to reset the user CAUTION parameters to the factory default settings.

  • Page 16: 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 through management software. In this configuration a stand-alone passive concentrator (such as an IBM 8228) may be added to the ring as shown in Figure 2-5.

  • Page 17: Chapter 3 Operation

    Operation The 9T122-24 MicroLAN Module provides connectivity between the front panel Token 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. The 9T122-24 module connects to the FNB bus. Shown in Figure 3-1 is a block diagram of the module.

  • Page 18: Transparent Bridging

    9T122-24 does not forward across the Token Ring link. The second filtering process, the Cabletron Systems Special Filtering Database, provides an additional step in the filter/forward decision. Through Remote Management, you can define up to 10 additional filtering parameters for incoming network traffic.

  • Page 19: Spanning Tree Algorithm

    The receiving bridges append their own route information to the Route Information Field (RIF) in the MAC frame header and transmit the frame again. Eventually, the original source device receives all of the ARE replies from the other end stations on the network. From this information, the source device can determine a desired route for each frame it transmits.

  • Page 20: Flexible Network Bus (Fnb)

    Operation Flexible Network 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. This allows the FNB to traverse multiple MMAC-Plus hubs, or connect to any ANSI FDDI-compliant device, through standard A/B port connections, using the FDDI repeater module.

  • Page 21: System Diagnostic Controller

    System Diagnostic Controller This diagnostic controller is composed of a Z-80 microprocessor and it’s supporting logic. The diagnostic controller is designed to control the power-up sequencing of modules, monitor the 9T122-24 input and output power parameters, keep watch over the main host processor, as well as monitor the temperature and control the SMB LANVIEW diagnostic LED.

  • Page 22: Chapter 4 Lanview Leds

    LANVIEW LEDs The front panel LANVIEW LEDs, shown in Figure 4-1, indicate the status of the module and may be used as an aid in troubleshooting. FNB Receive Token Ring Speed T O K E N R I N G 9T122-24 16 Mb (16mb)
  • Page 23 LANVIEW LEDs The functions of the two System Status LEDs, System Management Bus (SMB) and the CPU, are listed in Table 4-1. LED Color Green Yellow Yellow/Green Red (Flashing) The function of the FNB receive LED is listed in Table 4-2. LED Color Red (Flashing) Green...
  • Page 24 The function of the Token Ring Mac receive LEDs are listed in Table 4-4. Table 4-4. Token Ring Receive LED LED Color No link, Port disabled Red (Flashing) Link, Port disabled Green Link, No activity, Port enabled Yellow (Flashing) Link, Activity (Flashing rate indicates rate of activity). No link, No activity, Port enabled The function of the Token Ring Mac transmit LEDs are listed in Table 4-5.
  • Page 25 LANVIEW LEDs The function of the Token Ring speed LEDs is listed in Table 4-7. Table 4-7. Token Ring Speed LED Color State Yellow 16 Mbs 4 Mps...

  • Page 26: Chapter 5 Specifications

    Specifications Safety It is the responsibility of the person who sells the system to which the module will be a part to ensure that the total system meets allowed limits of conducted and radiated emissions. CAUTION This equipment meets the safety requirements of: •...

  • Page 27: Physical

    Specifications Physical 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) Weight: Unit: Shipping: Electrical CPU: Shared DRAM Memory: 4Mb (expandable to 12 Mb) Local DRAM Memory: Flash: Token Ring Interfaces: NVRAM: 1.36 kg.

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