HP 10:10 LAN Bridge MB Manuale di installazione e funzionamento

Printed in Singapore 4/98

Manual Part Number

28673-90001

*28673-90001*

Technical information in this document

is subject to change without notice.

©Copyright Hewlett-Packard Company

adaptation, or translation without prior

written permission is prohibited except

as allowed under the copyright laws.

Less Work, More Network

HP Networking

HP 10:10 LAN Bridge MB

Installation and

Reference Guide

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HP Network Connectivity Products

visit our web site at:

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HP 10:10 LAN Bridge MB

Installation and Reference Guide

Hewlett-Packard Company makes no warranty of any kind with regard to this material, including, but

not limited to, the implied warranties of merchantability and fitness for a particular purpose.

Hewlett-Packard shall notbe liable for errors contained herein or for incidental or consequential

damages in connection with the furnishing, performance, or use of this material.

This document contains proprietary information, which is protected by copyright. No part of this

document may be photocopied, reproduced, or translated into another language without the prior

written consent of Hewlett-Packard. The information contained in this document is subject to change

without notice.

Safety Considerations

The product and related documentation must be reviewed for familiarization with safety markings and

instructions before installation and operation. See the documentation section entitled “Safety

Information”.

Informations concernant la sécurité

Ce produit et la documentation s’y rapportant devront être étudiés avant l’installation et l’utilisation,

afin de se familiariser avec les symboles et instructions de sécurité. Reportez-vous à la section

«Informations concernant la sécurité».

Hinweise zur Sicherheit

Sehen Sie sich das Produkt an und lesen Sie die begleitende Dokumentation, damit Sie vor der

Installation und dem Betrieb mit den Sicherheitsmarkierungen und Anleitungen vertraut sind. Bitte

lesen Sie das Kapitel mit der Überschrift “Hinweise zur Sicherheit”.

Considerazioni sulla sicurezza

Esaminare il prodotto e la relativa documentazione per familiarizzarsi con gli avvisi e le istruzioni di

sicurezza prima dell’installazione e dell’uso. Vedere la sezione di questo documento intitolata

“Considerazioni sulla sicurezza”.

Consideraciones sobre seguridad

Antes de instalar y hacer funcionar el producto, se deben estudiar el producto y la documentación

relacionada a fin de familiarizarse con las indicaciones de advertencia e instrucciones. Ver la sección

del documento titulada “Consideraciones sobre seguridad”.

HP 28673A

HP 10:10 LAN Bridge MB

Installation and Reference Guide

HP Part Number: 28673-90001

March 1992

Edition 2

E0392

In This Guide

This guide contains information to help you install, configure, and troubleshoot your

HP 28673A 10:10 LAN Bridge MB. The guide is organized as follows:

Chapter 1 provides a brief introduction to the bridge. It describes important product features,

what you should have received with your bridge, and an overview of how the bridge works.

Chapter 2 provides bridge installation instructions. It describes, in detail, the steps that you

should follow to install the bridge.

Chapter 3 describes all the bridge’s console interface commands.

Chapter 4 contains troubleshooting information. If you experience problems with the bridge,

you should refer to this chapter.

Appendix A provides information on the cables and connectors that you should use to connect

the bridge to the other devices in your network.

Appendix B contains the technical specifications for the bridge.

Appendix C describes how to configure commonly found modems for use with the bridge’s

console connection.

Appendix D provides information on network addressing for those using SNMP network

management stations to manage the bridge over an IP or IPX network.

Appendix E provides a lists of Ethernet packet types and vendor codes to help you configure

the bridge to perform certain types of packet filtering.

Safety Information contains safety information about the bridge. You should read and

understand this information before you use the product.

Contents

1 Introducing the HP 10:10 LAN Bridge MB

Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Included Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Front of the Bridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Status LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Back of the Bridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

Bridge Status LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

Port Status LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

Reset and Clear Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

2 Installation

Installation Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

1. Mount the bridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

2. Connect the networks to the bridge . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

Using the AUI Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Using the ThinLAN Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

3. Plug in the bridge and verify . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

4. Customize the bridge’s configuration (if needed) . . . . . . . . . . . . . . . . . . 2-9

3 Configuration

Starting a Console Session . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Connecting a Terminal Directly . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Connecting a Modem and Terminal . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

If You Have Trouble with a Terminal or Modem Connection . . . . . . . . . . . . 3-4

Configuration Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

ADdress Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

IP config . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

OPerating State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8

WIldcard Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

4 Operation

Console Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

Main Menu Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

Config Mode Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7

Status Mode Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8

Resetting the Bridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11

Effects of the Reset Methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11

Executing the Reset Methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13

Clearing the Bridge Password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14

5 Troubleshooting

Basic Troubleshooting Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Diagnosing With the LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

Diagnostic Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4

Testing the Bridge Only . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4

Testing the Bridge and LANs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5

Testing the Network Links . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6

6 How the Bridge Works

The Bridging Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

Operating State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2

Address Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3

Wildcard Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5

Spanning Tree Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6

Automatic Network Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8

Firmware Enhancements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-9

Network Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-9

A Cables and Connectors

HP Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2

Other Standard Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3

Thin LAN Cable Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4

AUI Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4

Console Connector and Cable Pin-Outs . . . . . . . . . . . . . . . . . . . . . . . . . A-5

Pin-Out for Bridge’s Console Port Connector . . . . . . . . . . . . . . . . . . . . A-5

RS-232-C “Crossover” Cable (for Terminal/PC with 25-Pin Connector) . . . . . . A-6

RS-232-C “Crossover” Cable (for Terminal/PC with 9-Pin Connector) . . . . . . . A-6

RS-232-C Cable for HP 110 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-7

Null-Modem Adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-7

RS-232-C Modem Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-8

Loopback Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-9

For AUI Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-9

For ThinLAN Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-9

For Console Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-9

B Product Specifications

C Modem Configuration

HP 35031A Support Link II . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-1

HP 50759A Support Link . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-1

HP 37212B Support Link . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-1

Black Box V.32 9600 Async. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-2

Hayes 1200 Smartmodem (for both 8-and 10-switch units) . . . . . . . . . . . . . C-2

Racal Vadic Maxell 2400 VP (Hayes 2400 Compatible) . . . . . . . . . . . . . . . C-2

D Network Addressing

IPX Addressing for Novell NetWare . . . . . . . . . . . . . . . . . . . . . . . . . . . D-1

IP Addresses for TCP/IP Networks . . . . . . . . . . . . . . . . . . . . . . . . . . . D-2

Using Assigned IP Addresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-2

Building Your Own IP Addressing Scheme . . . . . . . . . . . . . . . . . . . . . D-3

E Ethernet Packet Types and Vendor Codes

Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Safety-1

Regulatory Statements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Regulatory-1

One-Year Limited Hardware Warranty . . . . . . . . . . . . . . . . . . . . . . . Waranty-1

Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Glossary-1

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Index-1

Introducing the HP 10:10 LAN Bridge MB

The HP 10:10 LAN Bridge MB (28673A) is a “media-speed” network bridge that connects two

independent IEEE 802.3 or Ethernet local area networks (LANs) to create one logical extended

LAN. This extended LAN gives you direct access to all compatible resources on the two

LANs. Figure 1-1 depicts a simple extended LAN using the HP 10:10 LAN Bridge MB.

The bridge performs these functions:

Extends communications beyond the length limitations of a single LAN.

Provides data packet filtering that inhibits the flow of unnecessary 802.3/Ethernet data

packets (MAC frames) from one network to another, eliminating the waste of valuable

bandwidth.

Provides parity checking and improved data integrity by verifying the cyclic

redundancy checksum (CRC) for each frame received.

For more detailed information on how the bridge performs its functions, see chapter 6, “How

the Bridge Works”.

LAN A

LAN B

HP 10:10 LAN Bridge MB

Nodes on LAN A

Nodes on LAN B

Figure 1-1. Extended LAN

Introducing the HP 10:10 LAN Bridge MB 1-1

Features

The HP 10:10 LAN Bridge MB has these features:

Filters and forwards packets as fast as the network can operate (media-speed

performance).

Automatically learns the addresses and locations of the nodes on the attached LANs.

Has a configurable address table that holds up to 512 station addresses (also called

MAC addresses, Ethernet addresses, or physical addresses).

Has a secure mode to control communications between nodes.

Supports the IEEE 802.1 spanning tree protocol for networks with multiple paths

between nodes.

Has 128 Kbytes of memory for buffering packets.

Automatically recovers from power failure while maintaining its configuration.

Has LEDs on the front and back that are easy to read and interpret.

Has both AUI and BNC connectors, enabling attachment to thin coax, thick coax,

fiber-optic, or twisted-pair LAN media.

Automatically detects which port 1 connector, AUI or BNC, is being used.

Has an RS-232-C port for connecting a console to customize the bridge’s configuration,

to monitor bridge activity and status, and to run diagnostic tests. Console access can be

either local, by attaching an ASCII terminal or PC directly to the console port, or

remote, by attaching a modem to the console port.

Has a power supply that automatically adjusts to the voltage range of the ac power being

supplied to the bridge (90-120 volts or 200-240 volts). No voltage range setting or fuse

change is needed.

Has a factory assigned station address allowing the bridge to respond to 802.2 Test

packets. The bridge can also be configured with an IP address and can respond to an

ICMP Echo Request message (also called “Ping”).

1-2 Introducing the HP 10:10 LAN Bridge MB

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