Digital Equipment DECbridge 90 Manuel utilisateur

DECbridge90

Owner’sManual

Order Number: EK-DEWGB-OM. B01

Revision/Update Information: This is a revised manual.

Digital Equipment Corporation

Maynard, Massachusetts

First Edition, April 1991

Second Edition, September 1992

The information in this document is subject to change without notice and should not be construed

as a commitment by Digital Equipment Corporation. Digital Equipment Corporation assumes no

responsibility for any errors that may appear in this document.

The software described in this document is furnished under a license and may be used or copied

only in accordance with the terms of such license.

No responsibility is assumed for the use or reliability of software on equipment that is not supplied

by Digital Equipment Corporation or its afﬁliated companies.

Restricted Rights: Use, duplication, or disclosure by the U.S. Government is subject to restrictions

as set forth in subparagraph (c) (1) (ii) of the Rights in Technical Data and Computer Software

clause at DFARS 252.227-7013.

Printed in U.S.A.

FCC NOTICE: The equipment described in this manual generates, uses, and may emit radio

frequency energy. The equipment has been type tested and found to comply with the limits for

a Class A computing device pursuant to Subpart J of Part 15 of FCC Rules, which are designed

to provide reasonable protection against such radio frequency interference when operated in a

commercial environment. Operation of this equipment in a residential area may cause interference,

in which case the user at his own expense may be required to take measures to correct the

interference.

The following are trademarks of Digital Equipment Corporation: BI, DEC, DECbridge, DECconnect,

DECmcc, DECnet, DECserver, Digital, LAT, MicroVAX, ThinWire, ULTRIX, UNIBUS, VAX,

VAX–11/780, VAX–11/785, VAX 3600, VAX 3900, VAX 6000, VAX 6300, VAX 6400, VAX 9000,

VAXcluster, VAX DOCUMENT, VAXELN, VAXstation, VMS, VT, and the DIGITAL logo.

This document was prepared using VAX DOCUMENT, Version 2.0.

Contents

About This Manual...................................... vii

1 Overview

Features............................................. 1–1

Description........................................... 1–2

DECbridge 90 Front Panel Lights and Switches . . . . . . . . . . . . . . 1–3

2 Conﬁguring the DECbridge 90

Supported Conﬁgurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–4

3 Installation

PowerSupply......................................... 3–1

SiteConsiderations .................................... 3–2

StandaloneInstallation ................................. 3–2

Mount DECbridge 90 on a Wall . . . . . . . . . . . . . . . . . . . . . . . . 3–3

Make Connections for Standalone Installations . . . . . . . . . . . . 3–5

WorkGroupConnection........................... 3–7

Power Supply Connection . . . . . . . . . . . . . . . . . . . . . . . . . . 3–7

BackplaneInstallation.................................. 3–8

Install the DECbridge 90 in the DEChub 90 Backplane . . . . . 3–9

Make Connections for Backplane Installations . . . . . . . . . . . . 3–9

4 Managing the DECbridge 90

DECbridge90Operation ................................ 4–1

DECbridge90Functions ............................. 4–2

Spanning Tree Algorithm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–3

Spanning Tree Algorithm Properties . . . . . . . . . . . . . . . . . . . . 4–3

MOP............................................. 4–3

MOPFunctions .................................... 4–3

iii

Accessing MOP from VMS Systems . . . . . . . . . . . . . . . . . . . . . 4–4

Accessing MOP from ULTRIX Systems . . . . . . . . . . . . . . . . . . 4–6

Console Carrier User Interface . . . . . . . . . . . . . . . . . . . . . . . . 4–6

Console Carrier Command Language . . . . . . . . . . . . . . . . . . . . . . . 4–7

Description of Command Parameters . . . . . . . . . . . . . . . . . . . . 4–9

Description of Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–10

Protocol Filtering Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–17

Remote Bridge Management Software (RBMS) . . . . . . . . . . . . 4–19

ErrorMessages ....................................... 4–20

5 Troubleshooting

CustomerServicesOption ............................... 5–5

A Speciﬁcations and Parts List

PartsList............................................ A–3

B Related Documentation

OrderingInformation................................... B–1

Continental USA and Puerto Rico . . . . . . . . . . . . . . . . . . . . . . B–1

New Hampshire, Alaska, and Hawaii . . . . . . . . . . . . . . . . . . . B–2

Outside the USA and Puerto Rico . . . . . . . . . . . . . . . . . . . . . . B–2

DigitalPersonnel................................... B–2

Index

Figures

1–1 Sample DECbridge 90 Connection . . . . . . . . . . . . . . . . 1–3

1–2 Indicators and Connectors . . . . . . . . . . . . . . . . . . . . . . 1–4

2–1 DECbridge 90 Conﬁgured to ThinWire Backbone . . . . 2–2

2–2 DECbridge 90 Conﬁgured to AUI Backbone . . . . . . . . . 2–3

2–3 Work Group With More Than 200 Stations . . . . . . . . . 2–5

2–4 Redundant Connections . . . . . . . . . . . . . . . . . . . . . . . . 2–6

2–5 Bridges in Work Group . . . . . . . . . . . . . . . . . . . . . . . . 2–7

2–6 Multiple Bridges in a Work Group . . . . . . . . . . . . . . . . 2–8

3–1 Standalone Installation . . . . . . . . . . . . . . . . . . . . . . . . 3–3

3–2 Removing the Back Cover . . . . . . . . . . . . . . . . . . . . . . 3–4

3–3 Connecting Transceiver Cables . . . . . . . . . . . . . . . . . . 3–6

3–4 Connecting to the Middle of a ThinWire Segment . . . . 3–7

3–5 Connecting to the End of a ThinWire Segment . . . . . . 3–7

3–6 Installing the DECbridge 90 into DEChub 90

BackplaneSlot8 ............................. 3–8

Tables

4–1 Ethernet Circuit Names for Systems . . . . . . . . . . . . . . 4–5

4–2 Summary of DECbridge 90 Commands . . . . . . . . . . . . 4–7

4–3 Protocol Type Codes and Names . . . . . . . . . . . . . . . . . 4–17

4–4 DECbridge 90 Error Messages . . . . . . . . . . . . . . . . . . . 4–20

5–1 Activity Indicators (LEDs) . . . . . . . . . . . . . . . . . . . . . . 5–2

5–2 Simple Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . 5–4

A–1 Physical Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . A–1

A–2 Operating Environment . . . . . . . . . . . . . . . . . . . . . . . . A–2

A–3 Shipping Environment . . . . . . . . . . . . . . . . . . . . . . . . . A–2

A–4 PowerSpeciﬁcations........................... A–2

A–5 Standalone Installation Kit Contents . . . . . . . . . . . . . . A–3

A–6 DEChub 90 Backplane Installation Kit Contents . . . . . A–3

About This Manual

This manual provides an overview of the DECbridge 90 unit and describes how

to conﬁgure, install, operate, manage, and troubleshoot the DECbridge 90. This

manual also provides the speciﬁcations and lists the related documentation for

the DECbridge 90.

In this manual, the DECbridge 90 unit may be referred to as the DECbridge 90,

work group bridge,bridge, or WGB.

Organization

This manual has ﬁve chapters and two appendices.

Chapter Description

1 Provides an overview of the DECbridge 90, including features,

description of front panel indicators, and conﬁgurations.

2 Provides conﬁguration rules for the DECbridge 90.

3 Describes how to install the DECbridge 90.

4 Describes how to manage the DECbridge 90 through the

Maintenance Operations Protocol (MOP) or Network Control

Program (NCP).

5 Describes how to troubleshoot the DECbridge 90.

Appendix A Describes the physical dimensions; the environmental,

electrical, and power speciﬁcations; and provides a parts

list.

Appendix B Provides a list of related documentation and ordering

information.

vii

Conventions

The following conventions are used in this manual:

Convention Meaning

Note Provides general information.

boldface type Boldface type in examples indicates user input. For example:

DECbridge>

SET PROTOCOL

parameters Parameters are italicized. For example:

SHOW PORT slot number

[ ] Characters within brackets represent optional parameters. For

example:

SHOW PORT [hub number,slot number]

viii

Overview

The DECbridge 90 unit offers a reliable, high-performance, easy-to-install means

of connecting two local area networks (LANs). Conﬁgured as a standalone unit

or in the DEChub 90 backplane, the DECbridge 90 provides greater network

reliability and efﬁciency by allowing the local area network to be partitioned into

a number of smaller LANs.

Features

The following list summarizes the main features of the DECbridge 90:

• Easy-to-use

• Plug-and-go installation

• Activity LEDs for easy diagnosis

• Small size

• Rack-mountable in DEChub 90

backplane

• Frame ﬁltering and frame forwarding

at full network throughput

• Protocol ﬁltering

• Support of spanning tree algorithm

• Management through Maintenance

Operations Protocol (MOP) console

carrier

• Support of Remote Bridge Management

Software (RBMS)

• ThinWire and 15-pin AUI Ethernet

interfaces

Overview 1–1

Description

The DECbridge 90 is a specialized LAN device that connects two Ethernet or

IEEE 802.3 LANs to form a single extended local area network (Figure 1–1).

One LAN, referred to as the backbone, can consist of an unrestricted number of

stations. The other LAN, referred to as the work group, is usually the smaller

of the two LANs and is optimized for LANs of fewer than 200 stations. When the

work group consists of fewer than 200 stations, the DECbridge 90 automatically

prevents unnecessary trafﬁc from being transmitted from one LAN to the other.

When there are more than 200 stations in the work group, the DECbridge 90

enters ﬂood mode, which reduces the effectiveness of the trafﬁc isolation,

but ensures full connectivity across the bridge. (Refer to Chapter 4 for more

information about ﬂood mode.)

The DECbridge 90 provides the network manager with additional control over

trafﬁc distribution through protocol ﬁltering and repeater management features.

All stations connected within the extended LAN communicate with one another

as if they were all on the same LAN. The connected LANs will work in networks

using equipment designed to be compatible with the Ethernet or IEEE 802.3

standards. The DECbridge 90 connects to the work group using a ThinWire

(10Base2) integral transceiver. The backbone connections are made through a

15-pin AUI Ethernet (10Base5) interface.

Figure 1–1 shows a sample DECbridge 90 connection.

1–2 Overview

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