HP 10:10 LAN Bridge MB Installation and operating manual

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
1990, 1992, 1998. All rights reserved. Reproduction,
adaptation, or translation without prior
written permission is prohibited except
as allowed under the copyright laws.
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HP 10:10 LAN Bridge MB
Installation and
Reference Guide
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HP 10:10 LAN Bridge MB
Installation and Reference Guide

Copyright Hewlett-Packard Company 1992. All rights reserved.
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.
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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.
2

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
3

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
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
5

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