Compaq Netelligent 1009B Manuel utilisateur

Compaq Registered U.S.Patent andTrademark Office.

Company and product names mentioned herein may be

trademarks and/or registered copyright and trademarks of

their respective companies.

Netelligent 1009B

10Base-T Hub

User Guide

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iii

Writer: Chris Seiter Project: Notice Comments:

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NOTICE

The information in this publication is subject to change without notice.

COMPAQ COMPUTER CORPORATION SHALL NOT BE LIABLE FOR TECHNICAL OR

EDITORIAL ERRORS OR OMISSIONS CONTAINED HEREIN, NOR FOR INCIDENTAL OR

CONSEQUENTIAL DAMAGES RESULTING FROM THE FURNISHING, PERFORMANCE, OR

USE OF THIS MATERIAL.

This publication contains information protected by copyright. No part of this publication may be

photocopied or reproduced in any form without prior written consent from Compaq Computer

Corporation.

The software described in this guide is furnished under a license agreement or non-disclosure agreement.

The software may be used or copied only in accordance with the terms of the agreement.

Product names mentioned herein may be trademarks and/or registered trademarks of their respective

companies.

1997 Compaq Computer Corporation.

Compaq

Registered United States Patent and Trademark Office.

Netelligent is a trademark of Compaq Computer Corporation.

Compaq Netelligent 1009B 10Base-T Hub User Guide

Second Edition (August 1997)

Part Number 167174-002

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Compaq Netelligent 1009B 10Base-T Hub User Guide

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Contents

Chapter 1

Introduction

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

Chapter 2

Hardware Description

Front Panel....................................................................................................................2-1

LED Indicator Panel..............................................................................................2-1

Back Panel ....................................................................................................................2-6

Port Connections ...................................................................................................2-6

Chapter 3

Installing the Hub

Site Requirements.........................................................................................................3-1

Connecting the Hub System .........................................................................................3-2

Chapter 4

Configurations

Stand-Alone Configuration...........................................................................................4-1

Connecting Multiple Hubs............................................................................................4-2

Using Crossover Twisted-Pair Cable ....................................................................4-3

Using the BNC Port...............................................................................................4-4

Guidelines for Multiple Hub Configuration.................................................................4-5

Appendix A

Troubleshooting

Appendix B

Port and Cable Pin Assignments

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Appendix C

Specifications

Appendix D

Regulatory Standards Compliance

Index

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Compaq Netelligent 1009B 10Base-T Hub User Guide

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Preface

About this Guide

This user guide is designed for the experienced network installer. It covers the

following information to help in the installation and configuration of the

Netelligent 1009B 10Base-T Hub:

QHardware description and summary of features

QHardware installation and configuration

QTroubleshooting tips

Package Checklist

Carefully unpack the contents of the package and verify them against the

checklist given below.

QNetelligent 1009B 10Base-T Hub

QBNC T-type connector

QPower adapter

QCompaq Netelligent User Guide CD

QCompaq Netelligent 10Base-T Hub Quick Install Guide

QWarranty registration card

If any parts are incorrect, missing, or damaged, contact your Compaq

Authorized Reseller. If possible, retain the carton and original packing materials

in case you need to repack the contents and return the hub for repair.

NOTE : To qualify your 1009B hub for a lifetime warranty, fill in the warranty

registration card and return it to Compaq Computer Corporation at the address

indicated on the card.

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1-1

Compaq Netelligent 1009B 10Base-T Hub User Guide

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Chapter 1

Introduction

The Netelligent 1009B 10Base-T Hub is an 8-port Ethernet hub featuring an on-

board microprocessor designed to monitor network utilization, collisions, link

and port partition status. The hub’s comprehensive LED indicator panel

simplifies installation and network troubleshooting by showing network

utilization and collision levels at the hub ports.

Features

The Netelligent 1009B 10Base-T hub provides the following features:

Automatic Partitioning and Reconnection – automatically isolates a port in

the event of excessive collisions and reconnects the port when normal operation

resumes

Jabber Lockup Protection – automatically stops transmission of abnormal

Ethernet frames that could cause data loss for the network

Automatic Polarity Detection – recognizes and adjusts 10Base-T ports for

attached cable assemblies which may be wired with incorrect polarity on the

receive pair

Eight independent RJ-45 ports – enables network connections using

10Base-T twisted-pair cable

Cascading – lets you connect the 1009B hub to another 1009B or compatible

hub using the hub’s uplink port

BNC Port – lets you connect the hub to 10Base2 (BNC) cabling

IEEE 802.3 Compliant – conforms to IEEE 802.3 repeater specification, as

well as the 10Base-T and 10Base2 standards

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2-1

Compaq Netelligent 1009B 10Base-T Hub User Guide

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Chapter 2

Hardware Description

The Netelligent 1009B 10Base-T Hub is a highly reliable network concentrator

that complies with IEEE 802.3 specifications. By passing data signals received

on any port to all other ports, without modification, this hub meets the

requirements for both Ethernet and IEEE 802.3 networks.

This chapter describes the main hub components. For easier management and

control of the hub, familiarize yourself with the front panel indicators. Figure

2-1 shows the front panel of the hub where the LED indicators are located.

Front Panel

This section describes the 1009B hub’s front panel.

Figure 2-1 . 1009B Hub Front Panel

LED Indicator Panel

The LED indicator panel let you easily monitor the status of each port and the

overall condition of the hub. The following sections describe the function of

each indicator.

Power

Color: Green

Label: Power

Function: Power indicator

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2-2

Hardware Description

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LED Activity Condition Indication

STEADY LIGHT ON Hub is receiving power.

NO LIGHT OFF Power is disconnected; no power received.

Utilization

The Utilization LEDs indicate the percentage of network bandwidth used by

valid data. The hub updates this display every 0.5 seconds.

Figure 2-2 . Utilization/Collision Indicators

Label (%) Color Function

1% 5% 15% Green Indicates percentage utilization of LAN

30% 65+% Amber

(yellow)

bandwidth.

There are five LEDs that represent the percentage of network utilization. The

corresponding LEDs light to show that the percentage utilization of LAN

bandwidth has reached this level. When active, these LEDs look like a stereo’s

equalizer display.

For example, if network utilization reaches 1%, the LED labeled 1% lights.

However, if network utilization rises above 1% (for example, 30%), the LED

labeled 30 and all the other LEDs before it (that is, 1, 5, and 15) light in rapid

succession.

These LEDs monitor the share of valid network frames transmitted by this hub

within a 10Mb/s bandwidth. They provide a quick way to monitor the current

traffic load relative to the network’s capacity.

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Collision

Label (%) Color Function

1% 3% 5% Green

10% 15+% Amber (yellow)

Indicates the percentage of packet collisions

occurring out of the total packets received by

the hub.

Collisions occur when two or more devices connected to a hub attempt to

transmit data simultaneously on the network. When a collision occurs, devices

pause and then re-transmit after a random wait period. Because wait periods

differ among devices, successive collisions become increasingly improbable.

The Collision LEDs help you monitor the percentage of packet collisions that

occur relative to the total packets received by the hub. Similar to Utilization

LEDs, the Collision LEDs have five numbers that represent collision

percentage. When collisions reach a level marked on the LED display, the

corresponding LED lights.

For example, if packet collisions reach 1%, the LED labeled 1% lights.

However, if collisions go beyond 1% (for example, 15%), the LED labeled 15+

and all the other LEDs before it (that is, 1, 3, 5, and 10) also light in rapid

succession.

NOTE: After 32 consecutive collisions occur on the cable segment connected to a

port, that port is automatically partitioned by the hub. The hub automatically

reconnects this port when a data packet longer than 512 bits (normal) is transmitted

by the partitioned port without collision.

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2-4

Hardware Description

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Figure 2-3 . Partition/Link Traffic LEDs

Partition

LED Activity Condition Indication

STEADY YELLOW

LIGHT

PARTITION Indicates port partitioning due to a cable error or

other abnormal network condition.

NO LIGHT OFF Port is in good condition.

A port is temporarily partitioned when a line error or too many collisions are

detected on the attached segment. While it is automatically partitioned, the port

continues to transmit data to the segment. However, data is not repeated from

the segment. When the problem is corrected or a valid data packet is received

through the port, the port is automatically reconnected. When partitioning

occurs, the port’s corresponding Partition LED is continually lit yellow.

Otherwise, this LED should be off.

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