3COM 3C16710 User Manual

F F I C E

U S E R

U I D

16710.bk : FRONT.FRM Page 1 Tuesday, October 7, 1997 11:38 AM

Part No. DUA1671-0AAA03

3C16710

O N N E C T

U B

8/TPM

Published October 1997

16710.bk : FRONT.FRM Page 2 Tuesday, October 7, 1997 11:38 AM

3Com Corporation

© 3Com Technologies, 1997. All rights reserved. No part of this documentation may be reproduced in any form or by any means or used to make any derivative work (such as translation, transformation, or adaptation) without permission from 3Com Technologies. 3Com Technologies reserves the right to revise this documentation and to make changes in content from time to time without obligation on the part of 3Com Technologies to provide notification of such revision or change. 3Com Technologies provides this documentation without warranty of any kind, either implied or expressed, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose. 3Com may make improvements or changes in the product(s) and/or the program(s) described in this documentation at any time.

UNITED STATES GOVERNMENT LEGENDS:

If you are a United States government agency, then this documentation and the software described herein are provided to you subject to the following restricted rights:

For units of the Department of Defense:

Legend:

Use, duplication or disclosure by the Government is subject to restrictions as set forth in subparagraph (c) (1) (ii) for restricted Rights in Technical Data and Computer Software clause at 48 C.F.R. 52.227-7013. 3Com Technologies, c/o 3Com Centre, BoundaryWay, Hemel Hempstead, Herts, HP27YU, UK.

■

5400 Bayfront Plaza

Restricted Rights

■

Santa Clara, California

For civilian agencies:

or disclosure is subject to restrictions set forth in subparagraph (a) through (d) of the Commercial Computer Software - Restricted Rights Clause at 48 C.F.R. 52.227-19 and the limitations set forth in 3Com Corporation’s standard commercial agreement for the software. Unpublished rights reserved under the copyright laws of the United States.

If there is any software on removable media described in this documentation, it is furnished under a license agreement included with the product as a separate document, in the hard copy documentation, or on the removable media in a directory file named LICENSE.TXT. If you are unable to locate a copy, please contact 3Com and a copy will be provided to you.

Unless otherwise indicated, 3Com registered trademarks are registered in the United States and may or may not be registered in other countries.

3Com, OfficeConnect, NetAge, SmartAgent and Transcend are registered trademarks of 3Com Corporation. 3ComFacts and Ask3Com are service marks of 3Com Corporation .

CompuServe is a registered trademark of CompuServe, Inc. Windows is a registered trademark of Microsoft Corporation. VT100 is a registered trademark of Digital Equipment Corporation.

■

95052-8145

Restricted Rights Legend:

Use, reproduction

Other brand and product names may be registered trademarks or trademarks of their respective holders.

C O N T E N T S I M P O R T A N T S A F E T Y I N F O R M A T I O N W I C H T I G E S I C H E R H E I T S H I N W E I S E L’ I N F O R M A T I O N D E S É C U R I T É I M P O R T A N T E Y O U R H U B A D D R E S S E S A B O U T T H I S G U I D E

I N T R O D U C T I O N

C R E A T I N G Y O U R N E T W O R K

A B O U T N E T W O R K M A N A G E M E N T

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LEDs and Ports 2-1 Before You Start 2-4 Posi t ion ing the Office Connect H ub 2-5 Using the Rubber Feet and Stacking Cl ips 2-6 Wall Mounting the Office Connect H ub 2-7 Connecting Workstations and Other Equipment to Your

Hub 2-7

Conne cti ng Office Connect H ubs Together 2-8

pot Checks 2-11

Introduction 1 How to Use This Guide 1 Conventions 2

Networking Terminology 1-2

3Com Network Management 3-1 Why Manage Your Hub? 3-2 Connecting to the Hub and Managing 3-3

Managing Through the Console Port 3-4 Managing Over the Network 3-6

Remote Management Service 3-7

M A N A G I N G Y O U R H U B U S I N G Q U I C K C O N F I G M A N A G E R

A D D I T I O N A L M A N A G E M E N T U S I N G

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Setting Up a Resilient Link Pair 4-34 Using the Hub to Monitor Other Devices 4-37 Additional Management 4-39

Installing Quick Config Manager 4-1

Installation Requirements 4-1

Installation Procedure 4-2 Running Quick Config Manager 4-2 Configuring Multiple Hubs 4-3 Quick Config Manager Window Map 4-3 Accessing the Hub 4-6 Giving the Hub an IP Address 4-7 Resetting the Hub 4-11 Initializing the Hub 4-11 Viewing the Hub 4-12 Displaying Information About the Hub 4-13 Setting Up the Alert LED 4-15 Monitoring 4-18

Monitoring Activity and Errors Statistics 4-19

Frame Types Statistics 4-21

Network Traffic Statistics 4-22

Network Errors Statistics 4-23 Configuring a Port 4-25 Hub Security 4-28

Configuring Security at Port Level 4-29

Configuring Security at Hub Level 4-31 Resilience 4-33

VT100 User Interface 5-1

Screens 5-1 Screen Components 5-2 Special Keystrokes 5-3

Repeater, Unit and Port Screens 5-4

creen Map 5-4

Getting Started 5-6

Main Banner 5-6 Logo n 5 -7 Main Menu 5-9 Logo ff 5 -9

Auto Logout 5-9 Configuring and Viewing Setup Information 5-10 Setting Up Traps 5-12

nnecting a Modem to t he Console Port 5-13 Configuring Local Security 5-15 Configuring Users 5-17

Creating Users 5-17 Editing Users 5-18 Deleting Users 5-19

Polling a Remote Device 5-19

VT100

P R O B L E M S O L V I N G

D I M E N S I O N S

T A N D A R D S A N D C A B L I N G

A N D

D D R E S S E S

T E C H N I C A L S U P P O R T

I N D E X L I M I T E D L I F E T I M E W A R R A N T Y

T A T E M E N T

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Viewing Internal Version Numbers 5-20 Downloading a Software Upgrade 5-21

Isolating a Problem 6-1 Problems When Using Your Hub 6-2 Problems When Using Quick Config Manager 6-3 Problems When Using VT100 6-3 Problems When Using an IP/IPX- ba sed Ma nagement

plication 6-4

, S

Dimensions and Operating Environment A-1 BABT Approval (for U.K. Users Only) A-1 Standards A-1 Cabling A-2

10BASE-T A-2 Console Port A-3

IP Addresses B-1

IPX A

Obtaining a Network Number B-2

How IP Addresses Work B-3 Assigning IP Addresses to a Small, Contained

Network B-5

IPX Addresses B-6

Online Technical Services C-1

World Wide Web Site C-1 3Com Bulletin Board Service C-1 3ComFacts Automated Fax Service C-2

3ComForum on CompuServe Online Service C-3 Support from Your Network Supplier C-4 Support from 3Com C-4 Returning Products for Repair C-6

EMC S

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I M P O R T A N T

A F E T Y I N F O R M A T I O N

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WA RNI NG :

Warnings contain directions that you must follow for your personal safety. Follow all instructions carefully.

Please read carefully the following information before installing the OfficeConnect® hub:

■

Exceptional care must be taken during installation and removal of the unit.

■

Only stack the OfficeConnect hub with other OfficeConnect units.

■

Only use the power adapter that is supplied with the unit to ensure compliance with international safety standards.

■

It is essential that the power outlet is located near the unit and is accessible. You can only remove power to the OfficeConnect hub by disconnecting the power adapter from the unit or from the socket outlet.

■

This unit operates under SELV conditions (Safety Extra Low Voltage) according to IEC 950, the conditions of which are maintained only if the equipment to which it is connected is also operational under SELV.

■

There are no user-replaceable fuses or user-serviceable parts inside the hub. If you have a physical problem with the unit that cannot be solved with problem solving actions in this guide, contact your supplier.

■

Disconnect the power adapter before moving the unit.

WARNING: Twisted Pair RJ45 ports.

These are shielded RJ45 data sockets. They cannot be used as telephone sockets. Only connect RJ45 data connectors to these sockets.

I C H T I G E

I C H E R H E I T S H I N W E I S E

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ACHTUNG:

die Sie zur eigenen Sicherheit zu befolgen haben.

Lesen Sie bitte die folgenden Informationen sorgfältig durch, bevor Sie den Hub einbauen:

■

Auf besondere Vorsicht muß während des Ein- und Ausbaus des Hubs geachtet werden.

■

Stapeln Sie den Hub nur mit anderen OfficeConnect Hubs zusammen.

■

Verwenden Sie nur das mit dem Hub mitgelieferte Netzteil um die internationalen Sicherheitsstandards zu erfüllen.

■

Die Netzsteckdose muß sich in unmittelbarer Nähe des Hubs befinden und frei zugänglich sein. Sie können den Hub nur spannungsfrei schalten, indem Sie das Steckernetzteil aus der Netzsteckdose ziehen oder die Verbindung zum Gerät unterbrechen.

Die Warnungen enthalten Anweisungen,

■

Dieser Hub arbeitet mit SELV-Spannung (Safety Extra Low Voltage, Sicherheitskleinspannung) gemäß IEC950. Diese Bedingungen werden nur eingehalten, wenn die Geräte mit denen der Hub verbunden ist ebenfalls mit SELV-Spannung arbeiten.

■

Es sind keine von dem Benutzer zu ersetzende oder zu wartende Teile in dem Gerät vorhanden. Wenn Sie ein Problem mit dem Hub haben, das nicht mittels der Fehleranalyse in dieser Anleitung behoben werden kann, setzen Sie sich mit Ihrem Lieferanten in Verbindung.

■

Bevor der Hub ausgebaut wird ist das Netzteil zu ziehen.

ACHTUNG: gedrehte paarfache RJ45 Anschlüsse.

Es sind abgeschirmte RJ45 Datenanschlußbuchsen. Sie dürfen nicht als Telefonanschluß verwendet werden. Verbinden Sie nur RJ45 Datenstecker mit diesen Anschlüssen.

L’ I N F O R M A T I O N D E

É C U R I T É I M P O R T A N T E

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AVERTISSEMENT:

Les avertissements contiennent les instructions que vous devez suivre pour votre sécurité personnelle. Suivre toutes les instructions avec soin.

Veuillez lire à fond l’information suivante avant d’installer le moyeu:

■

Le soin exceptionnel doit être pris pendant l’installation et l’enlèvement du moyeu.

■

Seulement entasser le moyer avec les autres moyeux OfficeConnects.

■

Seulement utiliser la pièce de raccordement d’alimentation qui est fournie avec le moyeu pour assurer la conformité avec les normes de sécurité internationales.

■

C’est essentiel que le socle de prise de courant du réseau soit localisé proche du moyeu et soit accessible. Vous pouvez seulement enlever l’alimentation au moyeu en débranchant la pièce de raccordement d’alimentation de l’unité ou du socle de prise de courant.

■

Ce moyeu fonctionne sous les conditiones SELV (Sécurité du Voltage le plus Bas) d’après IEC950, les conditions desquelles sont maintenues seulement si le matériel à qui il est branché est aussi en exploitation sous SELV.

■

Il n’y a pas de parties remplaceables par les utilisateurs ou entretenues par les utilisateurs à l’intérieur du moyeu. Si vous avez un problème physique avec le moyeu qui ne peut pas être résolu avec les actions de la résolution des problèmes dans ce guide, contacter votre fournisseur.

■

Débrancher la pièce de raccordement d’alimentation avant de remuer le moyeu.

AVERTISSEMENT: Les ports RJ45 de paire tordue.

Ceux-ci sont les socles de données RJ45 blindés. Ils ne peuvent pas être utilisés comme socles de téléphone. Seulement brancher les connecteurs de données RJ45 à ces socles.

Y O U R

U B

D D R E S S E S

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Using Quick Config Manager, you can configure address information for your hub, which affects the way you can manage it. It is important that you note down this information as you may need to enter it when managing the hub again. Use this page to note down your settings.

If you initialize the hub, the address settings are retained to allow you to continue managing the hub. If you want to return the hub to its default address settings, you must enter them manually.

For information on configuring the hub’s address settings, see “Giving the Hub an IP Address” on page 4-7 .

Parameter Default

Device Name

Emergency Contact

Support Contract

IP Address 0.0.0.0

Subnet Mask

Serial Line IP Address

Subnet Mask

Router IP Address

Manager IP Address

3Com

0.0. 0.0

192.168.101.1

255.255.255.0

0.0.0.0

Your Setting

A B O U T

H I S

U I D E

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Introduction

This guide describes how to set up and manage the OfficeConnect® Hub 8/TPM. The hub is ready for use in your network. It does not require management to get it working. Management simply allows you to perform additional network functions, for example monitoring your network and adding security.

This guide is written for users who are new to networking. If you are going to manage your network for the first time, it is possible you may make mistakes. We have tried to identify the likely errors you may make and have provided hints and tips to help you recover from these situations. If you are already familiar with network management, you may be able to skip some of the information in this guide and use the information given for reference purposes.

How to Use This Guide

This table shows where to find specific information:

If you are looking for information on:

The hub and networking terms

Creating your network

What you can do with management and the different ways you can manage your hub

Managing your hub using 3Com’s Transcend® Quick Configuration Manager

Additional management using VT100

Problem solving

Dimensions, standards and cabling

Network addressing (IP/IPX)

The OfficeConnect product range, obtaining technical support, and 3Com repair services

Turn to:

Chapter 1

Chapter 2

Chapter 3

Chapter 4

Chapter 5

Chapter 6

Appendix A

Appendix B

Appendix C

There is a Quick Reference Guide accompanying this guide. It contains some useful information from this guide which you may need to refer to regularly.

2 A B O U T T H I S G U I D E

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The text conventions that are used in this guide are:

Conventions

The icon conventions that are used in this guide are:

Icon

Type

Information Note Information notes call attention to

Caution

Warning

Description

important features or instructions.

Cautions alert you to personal safety risk, system damage, or loss of data.

Warnings alert you to the risk of severe personal injury.

Convention

“Enter” vs. “Type”

Text represented as

screen display

Text represented as

commands

Keys

Italics

Description

When the word “enter” is used in this guide, it means type something, then press the Return or Enter key. Do not press the Return or Enter key when an instruction simply says “type.”

This typeface

displays that appear on your screen, for example:

Enter the IP add ress: This typeface

commands that you enter, for example:

191.0.0 .172

When specific keys are referred text, they are called out by their labels, such as “the Return key” or “the Escape key,” or they may be shown as [Return] or [Esc].

If two or more keys are to be pressed simultaneously, the keys are linked with a plus sign (+), for example:

Press [Ctrl]+[Alt]+[Del].

Italics

are used to denote

emphasis

is used to represent

to in the

new terms

I N T R O D U C T I O N

3C om

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Welcome to the world of networking with 3Com ® .

In the modern business environment, communication and sharing information is crucial. Computer networks have proved to be one of the fastest modes of communication but until now only large businesses could afford the networking advantage. The Office Connect® p roduct range from

changed this, bringing networks to the small

office.

The Office Connect Hub 8/TP M is ideal for creating a small network. It is compact and attractively designed for desktop use, and is part of the Office Connect ra nge which neatly stack together with clips, providing a host of facilities, for example print sharing and a network fax. For information on these products, see “3Com provides easy access to technical support information through a variety of services. This appendix describes these services.” on page C-1 .

A single Office Connect hub allows you to create a small network with up to eight workstations, as shown in Figure 1-1 .

Figure 1-1 Small Network Featuring Office Connect H ub And

Optional Print Server

If you need to connect more workstations, simply connect and clip another Office Connect h ub to form

C H A P T E R

N T R O D U C T I O N

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1-2

a stack (each hub is a single repeater) . The Office Connect Hub 8/TP M h as eight 10BASE-T ports and a ninth 10BASE-2 (Coax) port. This guide helps you get the most out of your hub .

1: I

Networking Terminology

Network

Local Area Network (LAN)

Ethernet

10BASE-T

10BASE-2

Network Loop

is a collection of workstations (for example, IBM-compatible personal computers) and other equipment (for example, printers), connected for the purpose of exchanging information. Networks vary in size, some are within a single room, others span continents.

is a network, usually in an

office, that spans no more than a single site.

is a type of LAN, referring to the technology used to

pass information around the network.

is the name given to the Ethernet protocol that runs over hub uses network.

is the name given to the Ethernet protocol that runs over

equipment are connected by more than one path. Your hub detects this and of its ports to break the loop.

Twisted Pair (TP) RJ45

type connectors for connecting your

Coaxial

occurs when two pieces of network

cable.

cable. The Office Connect

Partitions

(isolates) one

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Segment

is the length of Ethernet cable connected to a port, whether this cable is 10BASE-T, 10BASE-2 (Coax) , or other type. When you daisy-chain equipment together with 10BASE-2 (Coax) cable, of the cable forms a single segment.

Packets

are the units of information your workstations and

other equipment send to each other over the network. A

Frame

is the data part of a packet. It is

the information that is seen by the hub.

Collisions

are a p art of normal Ethernet operation and occur if two or more devices attempt to transmit at the same time. A sudden sustained increase in the number of collisions can indicate a problem with a device, particularly if it is not accompanied by a general increase in traffic. On coaxial segments an increase in collisions can also indicate faulty cabling.

Device

is a term that is usually used to refer to a piece of

network equipment. Every device has a unique address that is used to identify it on the network.

all

Networking Terminology

SNMP (Simple Network Management Protocol)

protocol that controls how a management station gains information from a device. SNMP provides:

■

A set of rules that defin e how a m anagement station can communicate with a device.

MIB (Management Information Base)

■

defines what information can be obtained from the device by the management station. Every SNMP-manageable device has a MIB, which is a list of information about it.

■

Unsolicited messages called

Traps

, which work differently to the usual request/reply management communication. You can configure a device so that it generates a trap if a certain condition occurs, for example a port partitioning. The trap is sent to the management station to inform it of the occurrence.

1-3

is a

that

C H A P T E R

N T R O D U C T I O N

I P.

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1-4

IP (Internet Protocol)

used to connect computers and data equipment into computer networks. It is used on a large international network called the universities, government facilities, research institutions and private companies. Netware protocol that perfor ms a similar function to

SLIP (Serial Line Internet Protocol)

protocol over a serial line connection.

VT100

is a type of terminal which uses AS CII characters.

VT100 screens have a text-based appearance.

Tel ne t

is a network application which enables a workstation

to connect to a device as if it were a terminal, such as VT100. It is provided as part of IP and is commonly available with SNMP network management.

Modem

(Modulator-Demodulator) is a piece of equipment used for transmitting computer data over telephone lines.

1: I

is a data communication protocol

Internet

, which is composed of

IPX

allows you to run the IP

is a Novell

C R E A T I N G

O U R

E T W O R K

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All of the products in the Office Connect® r ange are designed for ease of use. This chapter describes how to use your Office Connect Hub 8/TP M to create your network, and has information on:

■

The hub’s LEDs and ports

■

What you need to create your network

■

Where to site the hub

■

Using the rubber feet and stacking clips

■

Wall mounting the hub

■

Connecting your workstations and other equipment to the hub

■

Connecting your hub to other Office Connect h ubs

LEDs and Ports

■

The hub features diagnostic LEDs and easy to use ports.

The LEDs are shown in Figure 2-1 , and are used for:

Showing you how the hub and its ports are operating

Showing you how much your network is being used

Alerting you to a potential problem with your network

The ports are shown in Figure 2-2 , and are used for:

Connecting workstations and other equipment to your hub

Connecting your hub to another Office Connect h ub

Connecting a management station to your hub

Figure 2-1 and Figure 2-2 also appear on the Quick Reference Guide.

C H A P T E R

R E A T I N G Y O U R N E T W O R K

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2-2

2: C

Figure 2-1 The LEDs And How To U se Them

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LEDs and Ports

2-3

Figure 2-2 The Ports And H ow To Use Them

C H A P T E R

R E A T I N G Y O U R N E T W O R K

”

1 1

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2-4

2: C

Before You Start

Your OfficeConnect hub comes with:

■

One power adapter for use with the Office Connect hub

■

A Warranty Registration card for you to fill out and return

■

Four rubber feet

■

Four stacking clips

■

One 3.5 disk

■

A Quick Reference Guide

■

This guide

Transcend® Quick Configuration Manager

Workstation Connections

To connect workstations and other equipment to your hub, you need :

0BASE-T connections for all your equipment. 3Com produce a range of easy to install network adapters, which provide your workstations with 10BASE-T connections.

An operating system with network support configured, running on your workstations.

One ‘Straight-through’ 10BASE-T cable for every workstation or piece of equipment. A ‘Straight-through’ cable is one where the pins of one connector are connected to the same pins of the other connector. 10BASE-T cables can be shielded or unshielded. We recommend you use shielded. The maximum length you can use is 100 meters (328 feet).

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In order to comply with the 10BASE-T standard, ports designed for workstation connections have been marked with the graphical symbol ‘x’. This denotes a crossover in the port’s internal wiring, for example 1x, 2x, 3x...

Hub Connections

If you have additional hubs you want to connect using 10BASE-2 (Coax), you need:

■

One 10BASE-2 50 Ohm cable for each additional hub. The minimum cable length you can use is 0.5 meters (1.6 feet). The maximum segment length you can have is 185 meters (607 feet).

■

One 10BASE-2 ‘Y’ piece for each hub. You can use ‘ T’ pieces but ‘Y’ pieces provide adequate clearance of the other ports.

■

Two 10BASE-2 50 Ohm terminators ( end pieces ).

Posi t ion ing the Office Connect H ub

When installing your OfficeConnect hub, ensure:

■

It i s out of direct sunlight and away from sources of heat.

■

Cabling is away fro m power lines and fluorescent lighting fixtures, and so urces of electrical noise such as radios, transmitters and broadband ampli fiers.

■

Water or moisture cannot enter the case of the unit.

■

Air flow around the unit and through the vents in the side of the case is not restricted. We recommend you provide a minimum of 25.4 mm (1 in) clearance .

2-5

If you have additional hubs you want to connect using 10BASE-T, you need:

■

One ‘Straight-through’ 10BASE-T cable for each additional hub.

C H A P T E R

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2-6

2: C

Using the Rubber Feet and Stacking Cl ips

The four self-adhesive rubber feet prevent your hub from sliding around on your desk. Stick the feet to the marked areas at each corner of the underside of your hub.

The four stacking clips are used for neatly and securely stacking your OfficeConnect units together.

You can stack up to a maximum of four units. Large units must be stacked below small units.

To stack your units, secure the clips on one side and then on the other. Use the following method to secure one side:

Place your new unit on a flat surface. Your clips fit in the positions on the side of the unit, as shown in Figure 2-3 (1).

Position a clip over one of these holes and push it in until it clicks into place, as shown in Figure 2-3 (2). Repeat this for the other clip position on the same side.

Keeping the front of the units aligned, rest the bottom of the existing u nit on the clips’ spikes, as shown in Figure 2-3 (3). Push the clips firmly into the existing u nit until they click into place.

Figure 2-3 Clipping Your Units Together

Repeat these steps to secure the other side.

To remove a clip, hold the units firmly with one hand and hook the first finger of your other hand around the back of the clip. Use reasonable force to pull it off.

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Wall Mounting the Office Connect H ub

There are two slots on the underside of the OfficeConnect hub which are used for wall mounting. You can mount the hub with the LEDs facing upwards or downwards, to suit your needs.

When wall mounting your hub, ensure that it is within reach of the power outlet.

You need two suitable screws. Ensure that the wall you are going to use is smooth, flat, dry and sturdy. Make two screw holes which are 1 42 mm (5. 6 in) apart. Use the arrows at the top of the Quick Reference Guide to mark the position of the holes. Fix the screws into the wall, leaving their heads 3 mm (0.12 in) clear of the wall surface.

Remove any connections to the hub and locate it over the screw heads. When in line, gently push the hub on to the wall and move it downwards to secure. When making connections, be careful not to push the hub up and off the wall.

CAUTION:

mount stacked hubs.

Only wall mount single hubs, do not wall

Wall Mounting the Office Connect H ub

Connecting Workstations and Other Equipment to Your Hub

WARNING:

Safety Information section carefully before you start.

ACHTUNG:

Abschnitt mit den wichtigen Sicherheitshinweisen gelesen haben, bevor Sie das Gerät benutzen.

AVERTISSEMENT:

soigneusement la section de L’information de Sécurité Importante avant que vous commenciez.

CAUTION:

Wait about 5 seconds between power cycles.

Connecting workstations and other equipment to your hub is easy. Connect them using 10BASE-T cables to any of the hub’s eight 10BASE-T RJ45 ports.

10BASE-T cables are very easy to use. To connect a 10BASE-T cable, simply slot the connector into the relevant RJ45 port. When the connector is fully in, its latch locks it in place. To disconnect the cable, push the connector’s latch in a nd remove it.

Ensure you have read the Important

Versichern Sie sich, daß Sie den

Assurer que vous avez lu

Do not power the hub off and on quickly.

2-7

C H A P T E R

R E A T I N G Y O U R N E T W O R K

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2-8

The hub detects all port connections, so you can start using your network immediately. When you need more ports, simply add more Office Connect hub s.

If you are using port 8 to connect a workstation, ensure the MDI/MDIX switch is set to MDIX.

If you do not use the 10BASE-2 (Coax) port, you do not need to terminate it with a terminator (end piece) .

2: C

Conne cti ng Office Connect H ubs Together

You can increase the number of workstations that can connect to your network by adding more OfficeConnect hubs. You can use either 10BASE-T or 10BASE-2 (Coax) to do this:

■

With 10BASE-2 (Coax) you can connect up to 30 hubs on a single segment, leaving all of the RJ45 ports free.

■

With 10BASE-T you can connect up to four hubs in series.

CAUTION:

together using both 10BASE-T and 10BASE-2 (Coax). This causes a network loop.

Do not connect the same two hubs

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Connecting Hubs Using 10BASE-2 (Coax)

When using 10BASE-2 (Coax) cable, it is important that both ends of the segment are properly terminated with 50 Ohm terminators ( end pieces ) .

Only use 50 Ohm 10BASE-2 (Coax) cables and use a ‘Y’ piece for each hub. You can use ‘T’ pieces but ‘Y’ pieces provide adequate clearance of the other ports.

Connect a 10BASE-2 ‘Y’ piece to each of your hubs. Daisy-chain each ‘Y’ piece with 10BASE-2 (Coax) cable to form a single segment, as shown in Figure 2-4 . Remember to terminate the two free ends of the segment by fit ting t erminators (end pieces).

To disconnect a 10BASE-2 (Coax) cable, twist each connector counter-clockwise to unlock it, and remove it.

Conne cti ng Office Connect H ubs Together

2-9

Figure 2-4 Correct Hub Connections Using 10BASE-2 (Coax)

H A P T E R

R E A T I N G Y O U R N E T W O R K

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Connecting Hubs Using 10BASE-T

You can connect hubs together with 10BASE-T in a number of ways, but for simplicity we recommend the following method:

Starting from the bottom, connect port 8 of the lower hub to port 7 of the hub immediately above. Repeat for each hub, as shown in Figure 2-5 .

Set all MDI/MDIX switches to MDI (in) except for the top hub (the one with port 8 not connected to another hub). This unused port can be connected to a workstation provided that the MDI/MDIX switch is set to MDIX (out).

Figure 2-5 Correct Hub Connections Using 10BASE-T

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pot Checks 2-11

Checking Hub Connections

When you have connected your hubs, power them on. The Port Status LEDs for the ports you have used should be green for 10BASE-T, or off for 10BASE-2 (Coax). If they are not, check your connections .

If the 10BASE-2 (Coax) port is not used and is not terminated, the LED should be yellow showing that it has partitioned. This is correct operation.

pot Checks

At frequent intervals, visually check that:

■

The Alert LED is not lit — this is the best way to find out if there are problems with your network

■

Case vents are not obstructed

■

Cabling is secure and not pulled taut

If you suspect there is a problem, refer to Chapter 6 .

H A P T E R

R E A T I N G Y O U R N E T W O R

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2-12 C

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A B O U T

E T W O R K

A N A G E M E N T

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Network management is not required to get your hub working, it simply allows you to change the way it works and to monitor what is happening to your network. Each OfficeConnect® Hub 8/TPM is a separate manageable entity, that means you manage each OfficeConnect Hub 8/TPM individually. This chapter lists the management tasks you can perform, and describes the ways you can connect your management station to your hub. This guide uses refer to the piece of equipment you are using to manage the hub.

Transcend Quick Configuration Manager, referred to as

‘Quick Config Manager’

your hub and provides an easy-to-use graphical management system, through the hub’s console port. Quick Config Manager uses a familiar Windows interface with point and click operation. To use it effectively, you need to be familiar with Microsoft Windows. For information on Microsoft Windows, refer to the Microsoft Windows User’s Guide.

You can also manage your hub using a VT100 terminal or any Telnet facility that emulates a VT100 terminal. VT100 uses a text-based user interface.

‘Management Station’

in this guide, is supplied with

3Com Network Management

Quick Config Manager provides a subset of the functionality that is present in other 3Com management applications, for example the IP/IPX-based Transcend® Enterprise Manager for Windows (version 4.x and above).

Whether your network is large or small, its ongoing performance, growth and security are only as good as its management system.

Using intelligent 3Com software distributed throughout the network, 3Com’s Transcend management applications support all of today’s platforms and manage a wide variety of 3Com products. This gives you total control over your entire 3Com network from a single management station.

For further information about which Transcend management application can benefit your growing network, call your local sales office, see “3Com provides easy access to technical support

C H A P T E R

B O U T N E T W O R K M A N A G E M E N T

IP -

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3-2

3: A

information through a variety of services. This appendix describes these services.” on page C-1 .

Why Manage Your Hub?

With management, you can change and view the way your hub and network operates:

■

Configure IP information for the hub so that an

based network management station can

communicate with it.

■

Restart the hub to refresh its statistics and use any new configurations.

■

Initialize the hub to return it to its factory settings (IP and console port i nformation is re t ained ).

■

Display a graphical representation of the hub to quickly view the status of each port.

■

Display general hub information.

■

Configure the Alert LED to light for a number of conditions, and show what conditions have triggered the Alert LED to come on.

■

Graphically display network information for each port and the hub.

■

Enable and disable ports.

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