3Com 3C16710 - OfficeConnect 8/TPM Hub User manual

Part No.
DUA1671-0AAA03
Published
October 1997
O
F F I C E
C
O N N E C T
®
H
U B
8/TPM
3C16710
U
S E R
G
U I D E
16710.bk : FRONT.FRM Page 1 Tuesday, October 7, 1997 11:38 AM

3Com Corporation ■ 5400 Bayfront Plaza ■ Santa Clara,California ■ 95052-8145
©3Com Technologies,1997.All rights reserved.Nopart ofthis
documentation may be reproducedin any form or by any means
orusedtomakeanyderivativework(suchastranslation,
transformation, or adaptation)without permission from 3Com
Technologies. 3Com Technologiesreserves the right to revise this
documentation and to makechanges in content from timeto time
without obligation on the part of 3Com Technologies toprovide
notification of such revision orchange.3Com Technologies
provides this documentation without warranty of any kind, either
impliedor expressed, including, but not limited to, the implied
warranties of merchantability and fitness for aparticular purpose.
3Com maymakeimprovements or changes in the product(s)
and/or theprogram(s) described in this documentation at any
time.
UNITED STATES GOVERNMENTLEGENDS:
If you are a United Statesgovernmentagency,thenthis
documentation and the software described herein areprovided to
you subject to thefollowing restricted rights:
Forunitsofthe DepartmentofDefense:
Restricted Rights
Legend:
Use,duplication ordisclosureby theGovernment is
subject to restrictions as set forth in subparagraph(c) (1)(ii) for
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at48 C.F.R.52.227-7013.3Com Technologies,c/o 3Com Centre,
BoundaryWay, Hemel Hempstead, Herts, HP27YU, UK.
For civilian agencies:
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ordisclosure is subject to restrictions set forth in subparagraph(a)
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3Com Corporation’sstandardcommercial agreementfor the
software. Unpublished rights reservedunderthecopyright laws of
the UnitedStates.
If there is any software on removable media described in this
documentation, it is furnished undera licenseagreement included
with the product asa separatedocument, in thehard copy
documentation, oron theremovable mediain adirectory file
named LICENSE.TXT. If you areunable to locate a copy, please
contact 3Com and acopywill beprovided to you.
Unlessotherwise indicated,3Comregisteredtrademarksare
registered in theUnitedStates and mayor maynot beregistered
in other countries.
3Com, OfficeConnect, NetAge,SmartAgent andTranscendare
registeredtrademarks of3Com Corporation. 3ComFacts and
Ask3Com areservicemarks of 3Com Corporation .
CompuServeisaregisteredtrademarkofCompuServe,Inc.
Windows
is a registeredtrademark of Microsoft Corporation.VT100 is a
registered trademark of Digital Equipment Corporation.
Other brand and product names mayberegistered trademarks or
trademarks oftheirrespectiveholders.
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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
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M P O R T A N T E
Y
O U R
H
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A
D D R E S S E S
A
B O U T
T
H I S
G
U I D E
Introduction 1
How to Use This Guide 1
Conventions 2
I
N T R O D U C T I O N
Networking Terminology 1-2
C
R E A T I N G
Y
O U R
N
E T W O R K
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
S pot Checks 2-11
A
B O U T
N
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M
A N A G E M E N T
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
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M
A N A G I N G
Y
O U R
H
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U
S I N G
Q
U I C K
C
O N F I G
M
A N A G E R
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
Setting Up a Resilient Link Pair 4-34
Using the Hub to Monitor Other Devices 4-37
Additional Management 4-39
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
VT100
VT100 User Interface 5-1
Screens 5-1
Screen Components 5-2
Special Keystrokes 5-3
Repeater, Unit and Port Screens 5-4
S creen Map 5-4
Getting Started 5-6
Main Banner 5-6
Logon 5-7
Main Menu 5-9
Logoff 5-9
Auto Logout 5-9
Configuring and Viewing Setup Information 5-10
Setting Up Traps 5-12
Co 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
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Viewing Internal Version Numbers 5-20
Downloading a Software Upgrade 5-21
P
R O B L E M
S
O L V I N G
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
Ap plication 6-4
D
I M E N S I O N S
, S
T A N D A R D S A N D
C
A B L I N G
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
A N D
IPX A
D D R E S S E S
IP Addresses B-1
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
T
E C H N I C A L
S
U P P O R T
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
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
EMC S
T A T E M E N T S
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WARNING:
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.
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ACHTUNG:
Die Warnungen enthalten Anweisungen,
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.
■
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.
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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.
16710.bk : IMSAFETY.FRM Page 9 Tuesday, October 7, 1997 11:38 AM

Y
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D D R E S S E S
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 Your Setting
Device
Name
3Com
Emergency
Contact
3Com
Support
Contract
3Com
IP Address 0.0.0.0
Subnet
Mask
0.0. 0.0
Serial Line
IP Address
192.168.101.1
Subnet
Mask
255.255.255.0
Router
IP Address
0.0.0.0
Manager
IP Address
0.0.0.0
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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.
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.
How to Use This Guide
This table shows where to find specific information:
If you are looking for information on: Turn to:
The hub and networking terms Chapter 1
Creating your network Chapter 2
What you can do with management and the
different ways you can manage your hub
Chapter 3
Managing your hub using 3Com’s Transcend®
Quick Configuration Manager
Chapter 4
Additional management using VT100 Chapter 5
Problem solving Chapter 6
Dimensions, standards and cabling Appendix A
Network addressing (IP/IPX) Appendix B
The OfficeConnect product range, obtaining
technical support, and 3Com repair services
Appendix C
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Conventions
The icon conventions that are used in this guide are:
The text conventions that are used in this guide are:
Icon Type Description
Information Note Information notes call attention to
important features or instructions.
Caution Cautions alert you to personal
safety risk, system damage, or loss
of data.
Warning Warnings alert you to the risk of
severe personal injury.
Convention Description
“Enter” vs. “Type” 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.”
Text represented as
screen display This typeface
is used to represent
displays that appear on your screen, for
example:
Enter the IP address:
Text represented as
commands This typeface
is used to represent
commands that you enter, for example:
191.0.0.172
Keys When specific keys are referred to in the
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 Italics
are used to denote
new terms
or
emphasis
.
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1
I
N T R O D U C T I O N
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
3C om 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
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1-2 C
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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 .
Networking Terminology
A
Network
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.
A
Local Area Network (LAN)
is a network, usually in an
office, that spans no more than a single site.
Ethernet
is a type of LAN, referring to the technology used to
pass information around the network.
10BASE-T
is the name given to the Ethernet protocol that
runs over
Twisted Pair (TP)
cable. The Office Connect
hub uses
RJ45
type connectors for connecting your
network.
10BASE-2
is the name given to the Ethernet protocol that
runs over
Coaxial
cable.
A
Network Loop
occurs when two pieces of network
equipment are connected by more than one path.
Your hub detects this and
Partitions
(isolates) one
of its ports to break the loop.
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Networking Terminology 1-3
A
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,
all
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.
SNMP (Simple Network Management Protocol)
is a
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.
■
A
MIB (Management Information Base)
that
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.
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IP (Internet Protocol)
is a data communication protocol
used to connect computers and data equipment into
computer networks. It is used on a large international
network called the
Internet
, which is composed of
universities, government facilities, research
institutions and private companies.
IPX
is a Novell
Netware protocol that perfor ms a similar function to
I P.
SLIP (Serial Line Internet Protocol)
allows you to run the IP
protocol over a serial line connection.
VT100
is a type of terminal which uses AS CII characters.
VT100 screens have a text-based appearance.
Telnet
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.
A
Modem
(Modulator-Demodulator) is a piece of equipment
used for transmitting computer data over telephone
lines.
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2
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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.
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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
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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
”
Transcend® Quick Configuration Manager
disk
■
A Quick Reference Guide
■
This guide
Workstation Connections
To connect workstations and other equipment to
your hub, you need :
1
1 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.
2
An operating system with network support
configured, running on your workstations.
3
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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