Digital Equipment DECbridge 90FL Bedienungsanleitung

DECbridge90FL

Owner’sManual

Order Number: EK-DEWGF-OM. A01

Revision/Update Information: This is a new manual.

Digital Equipment Corporation

Maynard, Massachusetts

First Edition, August 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 ........................................... 1–1

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

2 Conﬁguring the DECbridge 90FL

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

3 Installation

Power Supply . . ....................................... 3–1

Site Considerations .................................... 3–1

Standalone Installation . . ............................... 3–2

Mount the DECbridge 90FL on a Wall ................... 3–4

Make Connections for Standalone Installations ............ 3–6

Backplane Installation . . . ............................... 3–9

Insert the DECbridge 90FL into the DEChub 90

Backplane . ....................................... 3–9

Make Connections for Backplane Installations ............ 3–11

4 Managing the DECbridge 90FL

DECbridge 90FL Operation .............................. 4–1

DECbridge 90FL Functions ........................... 4–2

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

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

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

MOP Functions .................................... 4–4

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

iii

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

Error Messages ....................................... 4–20

5 Troubleshooting

Customer Services Option ............................... 5–5

A Speciﬁcations and Parts List

Parts List ............................................ A–3

B Related Documentation

Ordering Information ................................... B–1

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

New Hampshire, Alaska, and Hawaii . ............... B–1

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

Digital Personnel . ............................... B–2

Index

Figures

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

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

2–1 DECbridge 90FL Conﬁgured to Fiber-Optic

Backbone ................................... 2–2

2–2 DECbridge 90FL 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 the Work Group ..................... 2–7

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

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

3–2 Removing the Back Cover ...................... 3–5

3–3 Connecting Transceiver Cables . . . ............... 3–7

3–4 Connecting to the Middle of a ThinWire Segment .... 3–8

3–5 Connecting to the End of a ThinWire Segment ...... 3–8

3–6 Installing the DECbridge 90FL in DEChub 90

Backplane . . . ............................... 3–10

Tables

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

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

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

4–4 DECbridge 90FL 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 Power Speciﬁcations........................... 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 90FL unit and describes

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

This manual also provides the speciﬁcations and lists the related documentation

for the DECbridge 90FL.

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

work group bridge,bridge,orWGB.

Organization

This manual has ﬁve chapters, two appendices, and an index.

Chapter Description

1 Provides an overview of the DECbridge 90FL, including fea-

tures, description of front panel indicators, and conﬁgurations

2 Provides conﬁguration rules for the DECbridge 90FL

3 Describes how to install the DECbridge 90FL

4 Describes how to manage the DECbridge 90FL through the

Maintenance Operations Protocol (MOP) or Network Control

Program (NCP)

5 Describes how to troubleshoot the DECbridge 90FL

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

This manual uses the following conventions:

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 90FL 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 90FL 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 90FL:

• 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)

• Fiber-optic link ports (10Base-FL)

and 15-pin AUI Ethernet

interfaces

Description

The DECbridge 90FL 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.

Overview 1–1

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

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 90FL enters ﬂood mode, which reduces the effectiveness of

the trafﬁc isolation, but ensures full connectivity across the bridge. (Refer to

Chapter 4, Management, for further information about ﬂood mode.)

The DECbridge 90FL 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 90FL connects to the work group using a ThinWire

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

of two user-selectable interfaces: ﬁber-optic interface (10Base-FL) or 15-pin AUI

Ethernet (10Base5) interface.

The 10Base-FL standard, which is an improved version of the original Fiber

Optic Inter Repeater Link (FOIRL) standard, allows backward compatibility of

the 10Base-FL bridge with a FOIRL transceiver. Bridge operation is transparent

to other stations on the LAN. No special software is required on any station.

Figure 1–1 shows a sample DECbridge 90FL connection.

1–2 Overview

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