Cabletron Systems IRM Installation guide

Brand: Cabletron Systems

Model: IRM

Type: Installation guide

Cabletron Systems IRM

The Cabletron Systems Intelligent Repeater Module (IRM) is a high-performance network device that provides a number of valuable features for managing and maintaining your network. Here are some of the key capabilities of the IRM:

IEEE 802.3 Repeater: The IRM includes an IEEE 802.3 compliant repeater to allow maximum data paths between devices connected MMAC. This ensures that all devices on the network can communicate with each other, even if they are using different types of cabling.
Network Management: The IRM can be controlled and monitored by a variety of Cabletron Systems Network Management packages, including SPECTRUM, Remote LANVIEW/Windows, and IRM/LM. This allows you to manage your network from a central location, and to quickly troubleshoot any problems that may arise.

Cabletron Systems IRM

IEEE 802.3 Repeater: The IRM includes an IEEE 802.3 compliant repeater to allow maximum data paths between devices connected MMAC. This ensures that all devices on the network can communicate with each other, even if they are using different types of cabling.
Network Management: The IRM can be controlled and monitored by a variety of Cabletron Systems Network Management packages, including SPECTRUM, Remote LANVIEW/Windows, and IRM/LM. This allows you to manage your network from a central location, and to quickly troubleshoot any problems that may arise.

INTELLIGENT REPEATER MODULE

(IRM)

INSTALLATION GUIDE

CABLETRON SYSTEMS, P.O. Box 5005, Rocheter, NH 03867-5005

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 ORRELATED TO THIS MANUAL OR

THE INFORMATION CONTAINED IN IT, EVEN IF CABLETRON SYSTEMS HAS BEEN

ADVISED OF, KNOWN, OR SHOULD HAVE KNOWN, THE POSSIBILITY OF SUCH

DAMAGES.

Cabletron Systems, Inc.

P.O. Box 5005, Rochester, NH 03867-5005

Printed in the United States of America

Order number: 9030033-03 July 91

LANVIEW

is a registered trademark of Cabletron Systems, Inc.

SPECTRUM, Remote LANVIEW/Windows, IRM, IRM/LM, MMAC-8, MMAC-8FNB

MMAC-5FNB, MMAC-3,

MMAC-3FNB, PSM, PSM-R, MMAC-5PSM, THN-MIM

, and

LAN-MD

are trademarks of Cabletron Systems, Inc.

NOTICE

FCC NOTICE

This device complies with Part 15 of 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.

WARNING

: This equipment uses and generates and can radiate radio frequency energy and if not

installed properly and used in accordance with the instruction manual, may cause interference to radio

communications. It has been tested and found to comply with the limits for a Class A digital device

pursuant to Part 15 of FCC Rules, which are designed to provide reasonable protection against such

interference in a commercial environment. Operation of this equipment in a residential area is likely

to cause interference in which case the user at his own expense will be required to take whatever steps

may be necessary to correct the interference.

If this equipment does cause interference to radio or television, which can be determined by turning

the equipment off and on, the user is encouraged to try to correct the interference by one or more of

the following measures:

• Re-orient the receiving antenna.

• Relocate the antenna with respect to the MMAC.

• Move the MMAC away from the antenna.

• Plug the MMAC into a different outlet so that the MMAC and the receiver are on different

branch circuits.

If necessary, the user should consult the dealer or an experienced radio/television technician for

additional suggestions. The user may33 ﬁnd the following booklet prepared by the Federal

Communication Commission helpful:

“How to Identify and Resolve Radio TV Interference Problems”

This booklet is available from the U.S. Government Printing Ofﬁce, Washington D.C. 20402 - Stock

No. 004-000-00345-4.

iii

CONTENTS

CHAPTER 1 INTRODUCTION

1.1 USING THIS MANUAL........................................................................1-1

1.2 GETTING HELP ....................................................................................1-2

1.3 THE INTELLIGENT REPEATER MODULE (IRM) ...........................1-2

1.4 REPEATER FUNCTIONALITY ...........................................................1-4

1.5 NETWORK MANAGEMENT CAPABILITIES...................................1-4

1.6 RELATED MANUALS..........................................................................1-5

CHAPTER 2 NETWORK REQUIREMENTS/SPECIFICATIONS

2.1 NETWORK REQUIREMENTS.............................................................2-1

2.1.1 AUI Port Requirements....................................................2-1

2.1.2 Thin-Net Requirements....................................................2-1

2.2 OPERATING SPECIFICATION ...........................................................2-2

CHAPTER 3 INSTALLING THE IRM

3.1 UNPACKING THE IRM........................................................................3-1

3.2 SETTING THE IRM JUMPERS ..........................................................3-1

3.2.1 Setting the Battery Enable/Disable Jumper .....................3-1

3.2.2 Setting the Default Setting Jumper (JP4).........................3-3

3.2.3 Setting the THN-MIM Jumper (JP2)...............................3-3

3.3 INSTALLING THE IRM........................................................................3-4

3.4 CONNECTING THE IRM TO THE NETWORK .................................3-5

3.4.1 Connecting to the Network Via the AUI Port..................3-5

3.4.2 Connecting to the Network Via the BNC Port.................3-8

CHAPTER 4 TESTING AND LANVIEW

4.1 INSTALLATION CHECK-OUT ..........................................................4-1

4.2 USING LANVIEW................................................................................4-2

4.3 USING THE RESET SWITCH.............................................................4-3

CONTENTS

1-1

CHAPTER 1

INTRODUCTION

Welcome to the Cabletron Systems

Intelligent Repeater Module

(IRM™) Installation Guide

. We have designed this manual to serve as a

simple installation and reference guide for the IRM, and to explain the

capabilities and special features of the IRM. The IRM provides an IEEE

802.3 Repeater with network management capabilities for use in a

Cabletron Systems Multi Media Access Center (MMAC

™

You should read through this manual to gain a full understanding of the

IRM and its capabilities.

1.1 USING THIS MANUAL

Chapter 1,

Introduction

, discusses the capabilities of Cabletron Systems'

IRM. The chapter includes an explanation of the IRM's repeater

functionality and a discussion of the IRM's Management capabilities. The

chapter concludes with a list of related manuals.

Chapter 2,

Installation Requirements/Speciﬁcations

, contains a list of

network requirements that must be met before you install the IRM. The

speciﬁcations for the IRM are also included in this chapter.

Chapter 3,

Installing the IRM

, contains instructions for installing the

IRM into the MMAC. The chapter also includes instructions for

connecting the IRM to the network.

Chapter 4,

Testing and Troubleshooting

, provides procedures for testing

and troubleshooting the installation of the IRM. Instructions for using

LANVIEW, Cabletron Systems' built-in visual diagnostic and status

monitoring system, are also included.

We assume that you have a general working knowledge of Ethernet or

IEEE 802.3 type data communications networks and their physical layer

components.

INTRODUCTION

1-2

1.2 GETTING HELP

If you need additional support related to the Cabletron Systems IRM, or if

you have any questions, comments or suggestions related to this manual,

feel free to contact Cabletron Systems' Technical Support at:

Cabletron Systems, Inc.

35 Industrial Way, P.O. Box 5005

Rochester, NH 03867-5005

Phone: (603) 332-9400

1.3 THE INTELLIGENT REPEATER MODULE (IRM)

The Cabletron Systems Intelligent Repeater Module (IRM) (Fig. 1-1) is

the heart of the Cabletron Systems Multi Media Access Center. The IRM

incorporates an IEEE 803.3 repeater to allow maximum data paths

between devices connected MMAC.

The IRM can be controlled and monitored by a variety of Cabletron

System Network Management packages. These include Cabletron

Systems Remote LANVIEW/Windows™ and Cabletron Systems

SPECTRUM™. Additionally, the IRM can be controlled and monitored

by IRM/LM™ - Local Management for the IRM via a terminal connected

locally.

The IRM incorporates three IEEE 802.3 compliant ports that connect to

external network segments: two AUI ports and one BNC port. The AUI

ports allow you to connect the module to a variety of Ethernet

transmission media including twisted pair, ﬁber optic, and/or thick or thin

Ethernet coaxial cable via an external transceiver. The BNC port can be

used to connect a Thin-Net Segment to the IRM.

A standard 9 pin RS232 console port that allows you to access IRM/LM

and a Reset Switch to initialize the IRM's processor are also built into the

IRM's front panel.

The IRM also incorporates Cabletron Systems' LANVIEW Status

Monitoring and Diagnostics Systems. Should a problem arise, such as a

power failure or a cable fault, LANVIEW's LEDs will help you to

diagnose it. LANVIEW LEDs on the IRM advise you whether the module

is receiving power, whether an error has been detected with the IRM,

whether the IRM is receiving packets from any segment

INTRODUCTION

1-3

Figure 1-1 Intelligent Repeater Module (IRM)

IRM

FAIL CLN

RESET

Reset Switch

15 Pin DB-15

AUI Ports

9 Pin RS232 Port

BNC Port

LANVIEW LEDs

INTRODUCTION

1-4

connected to the MMAC, or whether the module is detecting a collision

from the network.

1.4 REPEATER FUNCTIONALITY

The IRM's IEEE 802.3 compliant repeater provides the MMAC with the

ability to achieve maximum data paths on all Ethernet transmission

media, including 10BASE-T Twisted Pair, Fiber Optic, and Thick or Thin

Ethernet type cabling. To attain these maximum data paths, the IRM

retimes data packets and regenerates the preamble of each data packet that

enters the MMAC.

In addition, the IRM's repeater functionality assures that any problem

segments connected to any port on the MMAC will not affect any other

segments connected to the MMAC. If 33 consecutive collisions are

detected on any segment, or if a collision detector is on for more than 2.4

ms, the IRM will automatically partition that segment from the MMAC.

The segment will automatically be reconnected to the MMAC when a

packet is transmitted onto the segment without causing a collision.

1.5 NETWORK MANAGEMENT CAPABILITIES

The Cabletron Systems IRM can be controlled and managed by a variety

of network management packages. These include:

• Cabletron Systems' SPECTRUM

• Cabletron Systems' Remote LANVIEW/Windows

• Cabletron Systems' IRM/LM (Local Management)

The IRM's network management capabilities provide the necessary

management tools for the IRM to operate at its full capacity. Your ability

to set up parameters within these network management capabilities

ensures optimal performance of the IRM, and, hence, the network.

SNMP compliant management capabilities are also available for the IRM

monitoring by Third Party SNMP compliant Network Management

Packages.

INTRODUCTION

1-5

For further speciﬁc information, refer to the applicable Network

Management Package User's Manual.

1.6 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'

LAN-MD

User's Manual.

INTRODUCTION

1-6

2-1

CHAPTER 2

NETWORK REQUIREMENTS/SPECIFICATIONS

Before you attempt to install Cabletron Systems' IRM, review all

requirements outlined in this chapter. Also refer to the operating

speciﬁcations and environmental requirements that are listed.

All conditions, guidelines, speciﬁcations, and requirements included in

this chapter must be met to ensure satisfactory performance of the IRM.

Failure to follow these guidelines will result in unsatisfactory network

performance.

2.1 NETWORK REQUIREMENTS

When connecting network segments to the IRM, you must follow the

network guidelines listed below:

2.1.1 AUI Port Requirements

When connecting a network segment to the IRM, via a transceiver and an

AUI Cable, the following requirements must be met:

•

Transceiver

- The transceiver to which the IRM will be connected

must meet Ethernet Version 2, or IEEE 802.3 standards.

•

AUI Cable

- The AUI cable connecting the IRM to the transceiver on

the network must be IEEE 802.3 type cables and must not exceed 50

meters in length.

2.1.2 Thin-Net Requirements

When connecting a Thin-Net Segment to the IRM's BNC port, the

following requirements must be met:

•

Cable Type

- 50 ohm RG-58A/U type coaxial cable must be used

when making up a thin-net cable segment.

NETWORK REQUIREMENTS/SPECIFICATIONS

2-2

•

Length

- The thin-net segment must be no longer than 185 meters.

•

Terminations

- A 50 ohm terminator must be connected to the far ends

of each thin-net segment. The BNC port on the IRM is not internally

terminated.

•

Connections

- A maximum of 29 tee-connectors may be used

throughout the length of cable segment for host connections. If an

excessive number of barrel connectors are used within the cable

segment, such as ﬁnished wall plates with BNC feed-throughs, then a

reduced number of host connections may be required. For special

network design, contact Cabletron Systems’ Technical Support.

•

Grounding

- For safety, only one end of a thin-net segment should be

connected to earth ground. Connection to earth ground at more than

one point on the segment may allow for the occurrence of dangerous

ground currents.

The IRM's BNC port is not connected to earth ground.

2.2 OPERATING SPECIFICATIONS

The operating speciﬁcations for Cabletron Systems' IRM are included in

this section. Cabletron Systems reserves the right to change these

speciﬁcations at any time without notice.

REPEATER FUNCTIONALITY

Delay Times (Port x In To Port x out)

Start of Packet: 1450 ns max.

Collision to JAM: 1550 ns max.

Preamble

Input: Minimum of 40 bits to a maximum of

64 bits required.

Output: 64 bits min (last 2 bits are 1,1).

NETWORK REQUIREMENTS/SPECIFICATIONS

2-3

REPEATER FUNCTIONALITY (Cont..)

JAM Output:

If a collision occurs on one of the

segments, a pattern of 1, 0 is sent to

the other segments.

Minimum Packet Repeated:

96 bits including preamble (Packet

fragments are extended using the

JAM [1, O] data pattern).

FAULT Protection:

Each segment will disconnect itself

from the other segments if 33

consecutive collisions occur, or if the

collision detector of a segment is on

for longer than approximately 2.4

ms. This FAULT protection will

reset automatically after one packet

is transmitted onto the FAULT

protected segment without causing a

collision.

FRONT PANEL INDICATORS

Fail (Error)

When lit, this LED indicates that a

problem has been detected with the

IRM (red indicator).

CLN (Collision Present)

When lit, this LED indicates the IRM

is detecting a collision signal from

one of the segments connected to the

MMAC (red indicator).

Unlabeled (Yellow LED)

When lit this LED indicates that the

IRM is receiving network

management packets.

Unlabeled (Green LED)

When lit this LED indicates that the

IRM network management

capabilities are on line and

functional.

NETWORK REQUIREMENTS/SPECIFICATIONS

2-4

FRONT PANEL INDICATORS (Cont..)

NOTE:

There is one Receive and Port OK LED for each AUI Port, Ports 1

and 2, and the BNC Port, Port 3.

RCV (Receive)

When lit, this LED indicates the IRM is

repeating a data packet received from

the segment connected to the port

(yellow indicator).

POK (Port OK

) When lit, this LED indicates that the

Network Interface Chip associated

with the port has passed an internal

Loop Back Test and is ready for

transmission (green indicator).

CONSOLE PORT

Type: Standard 9 pin RS232 Port

Pin 1 Not Used Pin 6 Not Used

2 Transmit (TXD) 7 Ready to Send (RTS)

3 Receive (RXD) 8 Clear to Send (CTS)

4 Not Used 9 Not Used

5 Logic Ref.

AUI PORT

Type: 15 position D type receptacle

Pin 1 Logic Ref. Pin 9 Collision -

2 Collision + 10 Transmit -

3 Transmit + 11 Logic Ref.

4 Logic Ref. 12 Receive -

5 Receive + 13 Power (+12 Vdc)

6 Power Return 14 Logic Ref.

7 No Connection 15 No Connection

8 Logic Ref.

Connector Shell: Protective Ground

NETWORK REQUIREMENTS/SPECIFICATIONS

2-5

BNC IN'IREFACE

Internal Transceiver: Cabletron Systems' TMS-3™

Transceiver.

Type: BNC receptacle, with gold center

contact, for use with BNC type

tee-connectors and RG-58 thin-net

cable.

ENVIRONMENTAL REQUIREMENTS

Operating Temperature: +5

to +40

C (+41

to +104

Non-operating Temperature: -30

to +90

C (-22

to +160

Operating Humidity: 5 to 95% (non-condensing)

SAFETY

Designed in accordance with UL478, UL910, NEC 725-2(b), CSA,

IEC, TW, VDE class A. Meets FCC part 15, Class A limits.

WARNING

: It is the responsibility of the person who sells the system of

which the IRM will be a part to ensure that the total system meets allowed

limits of conducted and radiated emissions.

SERVlCE

MTBF (MHBK-217): >150,093 hrs. projected

MTTR <0.5 hr.

NETWORK REQUIREMENTS/SPECIFICATIONS

2-6

PHYSICAL PROPERTIES

Dimensions: 34.07D x 29.21H x 2.54W cm.

(13.4D x 11.5H x 1.0 W inches)

Weight:

Unit: 0.85 kg (1.95 lbs)

Shipping: 1.34 kg (2.95 lbs)

3-1

CHAPTER 3

INSTALLING THE IRM

This chapter contains instructions for installing the Cabletron Systems

IRM into a Cabletron Systems' MMAC. Additional instructions are

provided on setting the mode switches and for connecting segments to the

IRM.

3.1 UNPACKING THE IRM

Before you install the IRM, you should visually inspect the module.

Unpack the module as follows:

1. Remove the shipping material covering the IRM in the shipping box.

2. Carefully remove the module from the shipping box. Leave the

module in its conductive bag until you are ready to install it. Save the

shipping box and materials in the event the unit has to be reshipped.

3. Visually inspect the module. If any damage appears to have occurred,

contact Cabletron Systems' Technical Support immediately.

3.2 SETTING THE IRM JUMPERS

On the IRM are ﬁve jumpers (See Figure 3-1). Three of the jumpers, JP2,

JP4, and JP5, can be changed. JP1 is for Cabletron Systems use only and

should not be changed from its default positions. JP3 is not used.

3.2.1 Setting the Battery Enable/Disable Jumper (JP5)

The Battery Enable/Disable Jumper (JP5, Fig. 3-1) allows you to enable

or disable the Battery Backed-up RAM on the IRM. When set to the

Enabled position, all parameters that you enter into the IRM

INSTALLING THE IRM

3-2

Figure 3-1 IRM Jumper Locations

will be saved if power should fail to the MMAC, or if the IRM is removed

from the MMAC. When set to the disabled position, all parameters

entered into the IRM will be lost after approximately 10 minutes.

To set the Battery Enable/Disable Jumper:

• To enable the Battery Backed-up RAM, place the jumper over Pins 1

and 2.

• To disable the Battery Backed-up RAM, place the jumper over Pins 2

and 3. This is the position in which the IRM is shipped.

JP5

Battery Jumper

JP4

Default Settings

Jumper

JP3

Not Used

JP2

TNH-MIM

Jumper

NUMBERS

JP1

Cabletron Systems’

Use Only

1 2 3

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Cabletron Systems IRM Installation guide

Brand: Cabletron Systems

Model: IRM

Type: Installation guide

Cabletron Systems IRM

IEEE 802.3 Repeater: The IRM includes an IEEE 802.3 compliant repeater to allow maximum data paths between devices connected MMAC. This ensures that all devices on the network can communicate with each other, even if they are using different types of cabling.
Network Management: The IRM can be controlled and monitored by a variety of Cabletron Systems Network Management packages, including SPECTRUM, Remote LANVIEW/Windows, and IRM/LM. This allows you to manage your network from a central location, and to quickly troubleshoot any problems that may arise.

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Cabletron Systems IRM Installation guide

Cabletron Systems IRM Installation guide

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