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Cabletron Systems IRM-3 User Manual

Intelligent repeater module
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INTELLIGENT REPEATER
MODULE
USER'S GUIDE
IRM3
IRM3
SN
RESET
PWR
BOK
MGMT
RCV
POK
CLN
ON
PWR
A
U
I
ON
LNK
T
F
X
O
I
R
R
X
L
U
P
S
C
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ETHERNET

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Summary of Contents for Cabletron Systems IRM-3

  • Page 1 IRM3 INTELLIGENT REPEATER MODULE USER’S GUIDE IRM3 RESET MGMT ETHERNET...

  • Page 2: Led Indicators

    IRM3 QUICK REFERENCE CARD IRM3 is receiving power from MMAC. LED lit-Board is operating properly. LED not lit-Initialization problem. Press Reset switch. IRM3 is repeating packet received from a connected segment. MGMT IRM3 is receiving/transmitting management packets. Collision detected on a segment. Internal repeater port is OK.

  • Page 3: Jumper Settings

    IRM3 QUICK REFERENCE CARD Jumper Function Enables/Disables Battery. When enabled, user-entered parameters are saved if power to the IRM3 fails. When disabled, parameters are lost. Makes IRM3 compatible with any THN-MIMs being used in the MMAC. This jumper is set for THN-MIMs with part numbers 9000043-06 and above and for THN-MIMs with...
  • Page 4 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. The hardware, firmware, or software described in this manual is subject to change without notice. IN NO EVENT SHALL CABLETRON SYSTEMS BE LIABLE FOR ANY INCIDENTAL, INDIRECT, SPECIAL, OR CONSEQUENTIAL DAMAGES WHATSOEVER (INCLUDING BUT NOT LIMITED TO LOST PROFITS) ARISING OUT OF OR RELATED TO THIS MANUAL OR...

  • Page 5: 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 6 CABLETRON SYSTEMS, INC. PROGRAM LICENSE AGREEMENT IMPORTANT: Before utilizing this product, carefully read this License Agreement. This document is an agreement between you, the end user, and Cabletron Systems, Inc. (“Cabletron”) that sets forth your rights and obligations with respect to the Cabletron software program (the “Program”) contained in this package.

  • Page 7: United States Government Restricted Rights

    Notice UNITED STATES GOVERNMENT RESTRICTED RIGHTS The enclosed product (a) was developed solely at private expense; (b) contains “restricted computer software” submitted with restricted rights in accordance with Section 52227-19 (a) through (d) of the Commercial Computer Software - Restricted Rights Clause and its successors, and (c) in all respects is proprietary data belonging to Cabletron and/or its suppliers.

  • Page 8: Table Of Contents

    CHAPTER 1 INTRODUCTION Using This Manual... 1-1 The Intelligent Repeater Module (IRM3) ... 1-2 IRM3 Front Panel ... 1-4 1.3.1 IRM3 Features ... 1-5 Repeater Functionality... 1-5 Network Management Capabilities... 1-6 Getting Help... 1-7 Document Conventions ... 1-8 Related Manuals... 1-9 CHAPTER 2 NETWORK PLANNING AND CONFIGURATION Network Requirements ...
  • Page 9 Contents CHAPTER 4 LOCAL MANAGEMENT Accessing Local Management Using a Terminal ...4-3 4.1.1 Configuring a Local Management Terminal ...4-3 4.1.2 Terminal Attachment Cable Configuration ...4-4 4.1.3 Connecting the Terminal and Accessing Local Management4-5 Accessing Local Management Using a Modem ...4-7 4.2.1 Modem Configurations ...4-7 4.2.2...
  • Page 10 CHAPTER 5 TROUBLESHOOTING Using LANVIEW ... 5-1 Troubleshooting Checklist ... 5-4 Using the Reset Switch ... 5-5 Before Calling Technical Support ... 5-5 APPENDIX A SPECIFICATIONS Repeater Functionality...A-1 AUI Port ...A-2 Fiber Optic Interface ...A-2 Console Port...A-3 Microprocessors and Memory ...A-3 Environmental Requirements ...A-3 Agency Approvals...A-4 Service...A-4...

  • Page 11: Chapter 1 Introduction

    CHAPTER 1 INTRODUCTION Welcome to the Cabletron Systems Intelligent Repeater Module (IRM3) User’s Guide. This manual serves as an installation, management, and reference guide for the IRM3, and includes a description of the IRM3 capabilities and special features. The IRM3 provides a high performance IEEE 802.3 repeater with sophisticated network management capabilities for use in a Cabletron Systems Multi Media Access Center (MMAC).

  • Page 12: The Intelligent Repeater Module (Irm3)

    Chapter 1: Introduction Chapter 4, Local Management, describes Local Management (LM) and control capabilities for the IRM3. Local Management provides the tools to manage the IRM3 and its attached segments. Chapter 5, Troubleshooting, details the LANVIEW LEDs incorporated into the IRM3, which enable you to quickly diagnose any problems that may occur with the IRM3.
  • Page 13 Figure 1-1 Intelligent Repeater Module (IRM3) IRM3 User’s Guide The Intelligent Repeater Module (IRM3) IRM3 RESET MGMT ETHERNET 0494101 Page 1-3...

  • Page 14: Irm3 Front Panel

    Chapter 1: Introduction 1.3 IRM3 FRONT PANEL The IRM3 incorporates two ports that connect to external network segments: • One pair of IEEE 802.3 FOIRL fiber optic ports. The fiber optic ST port accommodates a wide variety of multimode fiber optic cable, including 50/125 m, 62.5/125 m, and 100/140 m fiber optic cable, up to 2 km in length.

  • Page 15: Irm3 Features

    The LANVIEW LEDs on the IRM3 indicate the following conditions: • The IRM3 is receiving power • An error has been detected with the IRM3 • The IRM3 is receiving packets from any segment connected to the MMAC • The IRM3 is detecting a collision from the network 1.3.1 IRM3 Features There are a number of features that provide for efficient use and maintenance of the IRM3.

  • Page 16: Network Management Capabilities

    Chapter 1: Introduction data packets and regenerates the preamble of each data packet that enters the MMAC. In addition, IRM3 repeater functionality assures that problem segments connected to any port on the MMAC do not affect any other segments connected to the MMAC. If 32 consecutive collisions are detected on any segment, or if a collision detector is on for more than 2.4 ms, the IRM3 automatically partitions that segment.

  • Page 17: Getting Help

    To help you see how your network is being used, and to help you plan for future network use, the IRM3 also provides Ethernet protocol counters on the port and board level for the following protocols: • AppleTalk • Banyan •...

  • Page 18: Document Conventions

    Chapter 1: Introduction Before calling Cabletron Systems Technical Support, be prepared to provide the following information: • A detailed description of the failure. • A description of any action already taken to resolve the problem (swapping the bad unit with a unit known to work properly, etc.) •...

  • Page 19: Related Manuals

    1.8 RELATED MANUALS The manuals listed below should be used to supplement the procedures and other technical data provided in this manual. The procedures will be referenced where appropriate, but will not be repeated. Cabletron Systems Multi Media Access Center Overview and Setup Guide.

  • Page 20: Chapter 2 Network Planning And Configuration

    CHAPTER 2 NETWORK PLANNING AND CONFIGURATION This chapter addresses some of the configuration issues that you should consider when installing the IRM3, including 802.3 standards related to repeaters, transceivers, and cables. This chapter also gives an overview of Cabletron Systems Multi Media Access Center (MMAC) and the Media Interface Modules (MIM) that can be managed by the IRM3.

  • Page 21: Fiber Optic Port Requirements

    Chapter 2: Network Planning and Configuration When connecting a network segment to the IRM3 through a transceiver and an AUI cable, the following requirements must be met: • The transceiver to which the IRM3 will be connected must meet Ethernet Version 1, Version 2 or IEEE 802.3 standards. •...

  • Page 22: The Irm3 In The Multi Media Access Center

    • Budget and Propagation Delay - When determining the maximum fiber optic cable length, the fiber optic budget delay and total network propagation should be calculated and taken into consideration before fiber runs are incorporated in any network design. Fiber optic budget is the combination of the optical loss due to the fiber optic cable, in-line splices, and fiber optic connectors.

  • Page 23: Media Interface Modules

    Chapter 2: Network Planning and Configuration 2.2.1 Media Interface Modules The following is a description of the types of Cabletron Systems MIMs that can be installed in the MMAC and managed by the IRM3. THN-MIM Thin Coaxial Module The THN-MIM has 12 Ethernet/IEEE 802.3 compliant attachments to either thin or thick coaxial cable through a thick-to-thin adapter.

  • Page 24: Sample Network Configuration

    Sample Network Configuration TRMIM Token Ring Modules Cabletron Systems TRMIM Token Ring modules are available with 12 or 24 ports equipped with either RJ45 or DB9 connectors. Token Ring modules that support unshielded twisted pair (UTP) cable provide for segments of up to 100 meters. With modules that support shielded twisted pair (STP) cable, you can attach segments of up to 200 meters.

  • Page 25: Chapter 3 Installing The Irm3

    INSTALLING THE IRM3 This chapter provides the instructions needed to install and verify the proper operation of the IRM3 into a network. The information in this chapter pre-supposes that the previous sections have been completed properly. To install and test the IRM3 perform the following: •...

  • Page 26: Setting The Irm3 Jumpers

    Chapter 3: Installing the IRM3 3.2 SETTING THE IRM3 JUMPERS There are eight jumpers on the IRM3 as shown in Figure 3-1. Four of the jumpers, H1, H6, H8, and JP1 can be changed. The remaining jumpers are for Cabletron Systems use only and should not be changed from their default positions.

  • Page 27: Setting The Cts External/Internal Jumper (H6, H8)

    Battery Enable/Disable THN-MIM Jumper H1/JP1 Pin Numbers Figure 3-1 IRM3 Jumper Locations 3.2.2 Setting the CTS External/Internal Jumper (H6, H8) The IRM3 UPS port and CONSOLE port are RS232 interfaces that use Request to Send (RTS), Clear to Send (CTS), and Data Terminal Ready (DTR) to control data flow.

  • Page 28: Setting The Thn-Mim Jumper (Jp1)

    Chapter 3: Installing the IRM3 Set the CTS External/Internal Jumper as follows: • If RTS or DTR is generated by your device to the IRM3, place the jumper over pins 2 and 3. This is the position in which the IRM3 is shipped.
  • Page 29 IRM3 internal repeater ports have passed the internal loopback test and are now ready for transmission. • BOK lit, indicating the IRM3 is operating properly. IRM3 User’s Guide Installing the IRM3 into an MMAC Chassis IRM-3 Figure 3-2 IRM3 Installation KNURLED KNOBS 0494105 Page 3-5...
  • Page 30 Chapter 3: Installing the IRM3 RESET MGMT When the IRM3 is first powered up, the AUI port acts as the NOTES repeater port and the Fiber ports are off. This configuration can be altered using IRM3 Local Management or network management tools so that the Fiber ports act as the repeater port and the AUI port is off.

  • Page 31: Pre-Installation Test

    3.4 PRE-INSTALLATION TEST Before installing the IRM3 in a live network, test the module in a controlled situation to ensure that it is repeating packets. With the IRM3 installed in an MMAC hub with a Media Interface Module (MIM), this test can be performed with two workstations (Figure 3-1) by completing the following steps: 1.

  • Page 32: Connecting The Irm3 To The Network

    Chapter 3: Installing the IRM3 MMAC 3/FNB with IRM3 and TPMIM File Server Workstation Client Workstation 0494109 Figure 3-4 Pre-installation Test 3.5 CONNECTING THE IRM3 TO THE NETWORK This section provides procedures for connecting the IRM3 to the network using the AUI port or the Fiber Optic ports. Page 3-8 IRM3 User’s Guide...

  • Page 33: Connecting To The Network Through The Aui Port

    3.5.1 Connecting to the Network Through the AUI Port Connect to the network through the AUI port by performing the following steps: Be sure to disable the SQE test function on the transceiver you connect to the IRM3 AUI port. Failure to do so will result in improper operation of the IRM3.

  • Page 34: Connecting To The Network Through The Fiber Optic Port3-10

    Chapter 3: Installing the IRM3 3.5.2 Connecting to the Network Through the Fiber Optic Port When connecting a fiber optic link segment to the IRM3 Fiber Optic ports, you must keep the following in mind: • ST connectors attach to ST ports much like BNC connectors attach to BNC ports.
  • Page 35 4. At the other end of the fiber optic cable, attach the fiber labeled 1 to the transmit port of the device. 5. Attach the fiber labeled 2 to the receive port. ST Connectors Figure 3-6 Connecting to the Fiber Optic Ports 6.

  • Page 36: Installation Checkout

    Chapter 3: Installing the IRM3 3.6 INSTALLATION CHECKOUT After the IRM3 is connected to the network, verify that packets can be passed between the two Ethernet network segments through the IRM3. As in the pre-installation checkout, use two workstations set up as file server and client.

  • Page 37: Connecting To The Ups Through The Console Port

    Connecting to the UPS Through the Console Port MMAC 3/FNB with IRM3 and TPMIM Office Locations File Server Workstation Client Workstation 0494110 Figure 3-7 Installation Checkout 3.7 CONNECTING TO THE UPS THROUGH THE CONSOLE PORT If you are using an American Power Conversion CS-600R/CS-1250R series Uninterruptible Power Source (UPS), you can monitor and control the UPS through the IRM3, using SPECTRUM Element Manager for Windows.

  • Page 38: Local Management

    LOCAL MANAGEMENT The Cabletron Systems IRM3/LM provides unique management and control capabilities for the IRM3. With Local Management for the IRM3, you have the tools to manage the IRM3 and its attached segments. For example, you can enable and disable ports and set parameters such as the IP Address of your IRM3 or its current date and time.

  • Page 39: Chapter 4 Local Management

    Chapter 4: Local Management Figure 4-1 shows the IRM3/LM screen flow. Enter Password: IRM3 SNMP LOCAL MANAGEMENT INTRODUCTORY SCREEN DEVICE/BOARD PORT/COUNTERS SETUP COMMUNITY NAMES PORT ASSOCIATION TOKEN RING BOARD 0494111 Figure 4-1 IRM3 Local Management Screen Flow Page 4-2 IRM3 User’s Guide...

  • Page 40: Accessing Local Management Using Aterminal

    4.1 ACCESSING LOCAL MANAGEMENT USING A TERMINAL This section describes how to access local management using a terminal. Local Management for the IRM3 is accessed through a VT200 or VT300 series terminal, or terminals running emulation programs for these series terminals.

  • Page 41: Terminal Attachment Cable Configuration

    Chapter 4: Local Management Table 4-1 Terminal Setup Parameters (Continued) Menu Communications Setup Keyboard Setup 4.1.2 Terminal Attachment Cable Configuration Local Management is accessed by an RS232 cable available from Cabletron Systems. This cable connects the terminal to the IRM3 Console port.

  • Page 42: Connecting The Terminal And Accessing Local

    Table 4-3 9-pin to 9-pin Pinouts 9-Pin Male Connector (IRM3 End) Pin 3 (Receive) Pin 2 (Transmit) Pin 5 (Ground) Pin 7 (Request to Send) Pin 8 (Clear to Send) 4.1.3 Connecting the Terminal and Accessing Local Management This procedure assumes that the 9- to 25-pin RS232 cable, available from Cabletron Systems, is being used to connect the terminal to the IRM3.
  • Page 43 Chapter 4: Local Management 5. Press RETURN. The IRM3 SNMP Local Management introductory screen, shown in Figure 4-2, appears on the terminal. Figure 4-2 IRM3 SNMP Local Management Introductory Screen 6. Press RETURN. The Device/Board/Port Counters screen (Main), shown in Figure 4-4, appears. Refer to Section 4.4 for more information regarding this screen.

  • Page 44: Accessing Local Management Using Amodem

    4.2 ACCESSING LOCAL MANAGEMENT USING A MODEM Local Management for the IRM3 is accessed through a Hayes, or Hayes Compatible Modem meeting the AT Command Set. The modem is attached to the 9-pin port labeled CONSOLE on the IRM3. 4.2.1 Modem Configurations The modem configuration must be set as follows so that the modem can communicate with the IRM3 Local Management.

  • Page 45: Connecting The Modem And Accessing Management

    Chapter 4: Local Management 4.2.3 Connecting the Modem and Accessing Management If the modem you are using does not generate a Clear to Send NOTE (CTS) signal, Request to Send (RTS) signal, or a Data Terminal Ready (DTR) signal, the CTS jumpers on the IRM3 must be set to compensate for these signals.

  • Page 46: The Password Screen

    4.3 THE PASSWORD SCREEN When either the terminal or modem are properly connected to the IRM3, the Password screen shown in Figure 4-3 will appear. The Password screen is the first step in accessing the local management screens of the IRM3.

  • Page 47: The Device/Board/Port Counters Screen

    Chapter 4: Local Management 2. Press RETURN. The IRM3 SNMP Local Management introductory screen, shown in Figure 4-2, appears on the terminal. 3. Press RETURN. The Device/Board/Port Counters screen (Main), shown in Figure 4-4, appears. Refer to Section 4.4 for more information regarding this screen.

  • Page 48: Configuring The Device/Board/Port Counters Screen

    The errors are further broken down into the following categories: • Out of Window Collisions • Runt Packets • No Resources Available • Frame Alignment Errors • CRC Errors • Giant Packets You can also perform the following functions: • Reset all counter information associated with the MMAC back to zero.

  • Page 49: Device/Board/Port/Counters Screen Fields

    Chapter 4: Local Management 4.4.2 Device/Board/Port/Counters Screen Fields This section briefly describes the Device/Board/Port Counters screen fields. Counter information is displayed separately on the screen for the whole device (IRM3), the selected board, and the selected port. Bytes Received Displays the number of bytes received. Packets Displays the total number of packets received or transmitted.

  • Page 50: Resetting The Device/Board/Port Counters

    The Device/Board/Port Counters Screen Frame Alignment Errors Displays the number of errors due to misaligned packets. CRC Errors Displays the number of packets with bad Cyclical Redundancy Checks (CRC) that have been received from the network. This error is caused by a network device interfering with the original size of the packet when it is transmitted or received.

  • Page 51: Using The Enable Board/Disable Board Options

    Chapter 4: Local Management 4.4.4 Using the Enable Board/Disable Board Options The Enable and Disable Board options allow you to enable or disable the board that is displaying statistics at the Device/Board/Port Counters screen. Enable or disable the Board as follows: 1.

  • Page 52: Community Names Screen

    Community Names Screen COMMUNITY NAMES Select this option to designate community names for the devices attached to your IRM3. With these names, you can set the SNMP compliant network management workstations that will receive alarms from the IRM3. Community names authenticate an SNMP request, since the IRM3 only responds to a community name contained in the Community Name table.

  • Page 53: Accessing The Community Names Screen

    Chapter 4: Local Management 4.5.1 Accessing the Community Names Screen To access the Community Names screen: 1. Using the arrow keys, highlight COMMUNITY NAMES at the bottom of the Device/Board/Port Counters screen (see Figure 4-4). 2. Press RETURN. The Community Names screen, Figure 4-5, appears. The following describes the Community Names screen.

  • Page 54: Editing The Community Names Screen

    Access Indicates the access status of the workstations. The possible conditions are as follows: • RO (Read Only) These workstations have read only access to the IRM3. • RW (Read/Write) These workstations have read/write access. They can read and write to the IRM3, but they cannot change the IP address or the Community Names.

  • Page 55: The Setup Screen

    Chapter 4: Local Management 4. Press RETURN until the appropriate selection appears. The Access field is a toggle field that alternately displays RO, RW, SU, and NA when you press RETURN. 5. Using the arrow keys highlight the TRAPS field. 6.

  • Page 56: Accessing The Setup Screen

    4.6.1 Accessing the Setup Screen To access the IRM3 Setup option: 1. Using the right arrow key, highlight the SETUP option at the bottom of the Device/Board/Port Counters screen (see Figure 4-4). 2. Press RETURN. The Setup screen, Figure 4-6, appears. 11/15/91 14:28:49 Device Name:...

  • Page 57: Setting The Set Ip Address Option

    Chapter 4: Local Management Ethernet Address Displays the Ethernet address of the IRM3 in a hexadecimal format (XX-XX-XX-XX-XX-XX). IP Address and Set IP Address Displays the current IP address of the IRM3. Set Current Date Displays the current date setting at the IRM3. Set Current Time Displays the current time setting (in 24 hour format) at the IRM3.

  • Page 58: Setting The Set Current Date Option

    4.6.4 Setting the Set Current Date Option To use the Set Current Date option, perform the following steps: 1. Using the arrow keys, highlight the Set Current Date field. 2. Enter the date into the field in a mm/dd/yy format. 3.

  • Page 59: Setting The Set Refresh Time Option

    Chapter 4: Local Management 3. Using the arrow keys, highlight the SAVE SETUP option at the bottom of the Setup screen. 4. Press RETURN. The message “Modified screen Information Has Been Saved!” appears on the screen. If you have just unlocked the device, you must also reenable NOTE the boards.

  • Page 60: Port Association Screen Fields

    11/15/91 14:26:43 Device Name: Figure 4-7 Port Association Screen 4.7.2 Port Association Screen Fields The following briefly explains each field on the Port Association screen. Date Displays the date to which the internal clock of the IRM3 is set. Time Displays the time, in a 24 hour format, to which the internal clock of the IRM3 is set.

  • Page 61: Changing The Port Association

    Chapter 4: Local Management AUI Port, FIBER Port Displays the port association configuration the IRM3 is currently using. The available configurations are as follows: • REPEATER, OFF Indicates that the AUI port is acting as the repeater and the Fiber port is off.

  • Page 62: Accessing The Token Ring Board Status Screen

    4.8.1 Accessing the Token Ring Board Status Screen Access the IRM3 Token Ring Board Status Option as follows: 1. Using the arrow keys, highlight the Token Ring Board Status option on the Device/Board/Port Counters screen. If no Token Ring boards are installed, the option will be NO NOTE TOKEN RING BOARDS, and you will not be able to access the Token Ring Board Status screen.

  • Page 63: Token Ring Board Status Screen Fields

    Chapter 4: Local Management 4.8.2 Token Ring Board Status Screen Fields The following explains each field on the Token Ring Board Status screen. Date Displays the date to which the internal clock of the IRM3 is set. Time Displays the time, in a 24 hour format, to which the internal clock of the IRM3 is set.

  • Page 64: Enable Or Disable

    • INS (Inserted) Indicates that the station port is enabled and the attached station is operational (inserted into the ring). The station port must be enabled in order for the station to be inserted into the ring. Table 4-5 Station Port Configurations Station Attached (physical connection) No Station Attached...
  • Page 65 Chapter 4: Local Management Ring Port Status The Ring Port Status fields display only when you have a Token Ring concentrator module with externally accessible ring ports installed in the MMAC. These fields provide the Ring In (RI) and Ring Out (RO) conditions for the following: •...

  • Page 66: Editing The Token Ring Board Status Screen

    • RIGHT... ATTACHED Indicates the board is attached to the right FNB multiplexer. This indicates that the adjoining board has an open left FNB multiplexer (as long as both boards are set to the same ring speed, and are not in a bypass state).
  • Page 67 Chapter 4: Local Management Changing Station Port Status For Token Ring boards equipped with station ports, use the following option to change Station Port Status for any port on the board: 1. Using the arrow keys, highlight the STATION PORT X (X = port number) option.
  • Page 68 Changing Ring Port Status The Ring Port Status option displays only when a Token Ring board with externally accessible ring ports is installed in the MMAC. The Ring Port Status option enables you to turn the Ring In and Ring Out ports on or off. Depending on the type of board you have installed, the phantom current and media type options may also display.
  • Page 69 Chapter 4: Local Management 5. Refer to the previous section for a description of the FNB status conditions. 6. Use the arrow keys to highlight the SAVE command and press RETURN. The message “Modified screen Information Has Been Saved!” appears on the screen. Changing the Board Speed Setting Token Ring boards can operate at 4 Mbps or 16 Mbps.

  • Page 70: Chapter 5 Troubleshooting

    TROUBLESHOOTING This chapter includes information that will enable you to troubleshoot your IRM3 if a problem should occur. This chapter describes the LANVIEW LEDs on the IRM3, provides a troubleshooting checklist, and outlines the information you should have on hand if you need to call Cabletron Systems Technical Support.
  • Page 71 Chapter 5: Troubleshooting Table 5-1 LANVIEW Troubleshooting COLOR Green (Power) Green (Board OK) Yellow (Receive) Yellow (Manage- ment) POK (Port Green Page 5-2 ERROR DESCRIPTION CONDITION/RECOMMENDED ACTION Indicates that the If off, the IRM3 has lost power. IRM3 is receiving power from the Check the MMAC Power MMAC.
  • Page 72 Table 5-1 LANVIEW Troubleshooting (Continued) COLOR (Collision Present) PWR (AUI Green port power) Green (Fiber/AUI ports) Green (Link/ Fiber Port) IRM3 User’s Guide ERROR DESCRIPTION CONDITION/RECOMMENDED ACTION When flashing, a Excessive flashing or on solid collision is being indicates excessive collisions. detected on one or more segments Ensure that the SQE test is...

  • Page 73: Troubleshooting Checklist

    Chapter 5: Troubleshooting 5.2 TROUBLESHOOTING CHECKLIST If your IRM3 is not operating properly, the following checklist describes some of the problems that may occur with the IRM3 installed in an MMAC, possible causes for the problem, and suggestions for resolving the problem.

  • Page 74: Using The Reset Switch

    5.3 USING THE RESET SWITCH The IRM3 incorporates a recessed Reset switch, located above the LEDs. See Figure 5-1. This Reset switch initializes the IRM3 processor. This will not initialize the RAM where your network management parameters are stored. To use the Reset switch, use a small screw driver to press the switch in. When this is done, the IRM3 will initialize itself.

  • Page 75: A.1 Repeater Functionality

    The operating specifications for Cabletron Systems IRM3 are included in this Appendix. Cabletron Systems reserves the right to change these specifications at any time without notice. A.1 REPEATER FUNCTIONALITY Delay Times (Port x In to Port x Out): Start of Packet: Collision to JAM: Preamble: Input:...

  • Page 76: A.2 Aui Port

    Appendix A: Specifications A.2 AUI PORT Type: Connector Shell: Table A-1 AUI Port Connections Signal Logic Ref. Collision + Transmit + Logic Ref. Receive + A.3 FIBER OPTIC INTERFACE Internal Transceiver: Type: Error Rate: The transmitter power levels and receive sensitivity levels NOTE given above are Peak Power Levels after optical overshoot.

  • Page 77: A.6 Environmental Requirements

    A.4 CONSOLE PORT Type: Signal Carrier Detect (CD) Transmit (TXD) Receive (RXD) Data Terminal Ready (DTR) Logic Reference A.5 MICROPROCESSORS AND MEMORY MICROPROCESSORS Processor Type: LAN Controllers: MEMORY Dynamic RAM: Static RAM: ROM: FLASH EPROM Flash EPROM memory: The Flash EPROM memory enables users to upgrade the IRM3 firmware remotely.

  • Page 78: A.9 Physical Properties

    Appendix A: Specifications A.7 AGENCY APPROVALS SAFETY Designed in accordance with UL1950, CSA C22.2, N0. 950, EN60950, and IEC950. Emissions The IRM3 meets the emission requirements of FCC class A, EN55022 class A, and VCCI class I. It is the responsibility of the person who sells the system of NOTE which the IRM3 will be a part to ensure that the total system meets allowed limits of conducted and radiated emissions.
  • Page 79 Attenuation 2-2 AUI Port 4-24 AUI Port Requirements 2-1 AUTO 4-27 Battery Enable/Disable 3-2 Board Mode 4-27, 4-30 Board Settings 4-29 Board Speed 4-32 BYP 4-26 Cable length 2-3 Community Names 4-15 Community Names Screen accessing 4-16 editing 4-17 fields 4-16 CRC Errors 4-13 Date 4-21 Device Name 4-19...
  • Page 80 Index MMAC 2-3 Modem configurations 4-7 connecting 4-8 MT8-MIM 2-4 Network configurations 2-5 connecting to 3-8 management capabilities 1-6 requirements 2-1 Out of Window Collisions 4-12 Phantom 4-28 Port Admin. Status 4-13 Port Association 4-15 Port Association Screen accessing 4-22 fields 4-23 Port Seg.

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