3Com SuperStack II Switch 3000 10/100 User manual

®
http://www.3com.com/
SuperStack®II Switch 3000 10/100
User Guide
Agent Software Version 3.1
Document No. DUA1694-2AAA03
Published June 1997

3Com Corporation ■5400 Bayfront Plaza ■Santa Clara, California ■95052-8145
Copyright © 3Com Technologies, 1997. All rights reserved. No part of
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CONTENTS
ABOUT THIS GUIDE
Introduction 1
How to Use This Guide 1
Conventions 2
Related Documentation 2
1GETTING STARTED
About the Switch 3000 10/100 1-1
Summary of Features 1-1
Port Connections 1-2
10BASE-T / 100BASE-TX Ports 1-2
Plug-in Module 1-2
Switch Operation and Features 1-2
Intelligent Flow Management 1-2
Full Duplex 1-3
Resilient Links 1-3
Virtual LANs (VLANs) 1-3
Spanning Tree Protocol 1-4
PACE 1-4
Network Configuration Examples 1-5
Unit Overview — Front 1-7
10BASE-T / 100BASE-TX Ports 1-8
LEDs 1-8
Unit Overview — Rear 1-9
Power Socket 1-10
Unit Serial Number 1-10
Advanced Redundant Power System Socket 1-10
Reset Button 1-10
Console Port 1-10
Plug-in Module Slot 1-10
Ethernet Address 1-10
Unit Defaults 1-11
Managing the Switch 3000 10/100 1-12
Quick Start For SNMP Users 1-12
Entering an IP Address for the Switch 1-13
2INSTALLATION AND SETUP
Following Safety Information 2-1
Positioning the Switch 3000 10/100 2-1
Configuration Rules for Fast Ethernet 2-2
Configuration Rules with Full Duplex 2-2
Installing the Switch 3000 10/100 2-4
Rack Mounting 2-4
Stacking the Switch and Other Units 2-4
Wall Mounting 2-5
Powering-up the Switch 2-6
Connecting an Advanced Redundant Power System
(Advanced RPS) 2-6
Connecting Equipment to the Console Port 2-7
Connecting a VT100 Terminal 2-7
Connecting a VT100 Terminal Emulator 2-7
Connecting a Workstation Running SLIP 2-8

3SETTING UPFOR MANAGEMENT
Methods of Managing the Switch 3-1
Using the VT100 Management Interface 3-1
Using Telnet 3-2
Managing Over The Network 3-2
IP Addresses 3-2
Obtaining a Registered IP Address 3-3
Navigating the VT100 Screens 3-4
Screen Conventions 3-4
Keyboard Shortcuts 3-5
Correcting Text Entry 3-5
Setting Up the Switch for Management 3-6
Logging On 3-7
After Logging On 3-8
Switch Management Setup 3-9
Logging Off 3-12
Auto Logout 3-12
4MANAGING THE SWITCH 3000 10/100
Setting Up Users 4-2
Creating a New User 4-3
Deleting a User 4-4
Editing User Details 4-5
Assigning Local Security 4-6
Choosing a Switch Management Level 4-7
Setting Up the Switch Unit 4-9
Setting Up the Switch Ports 4-12
Setting Up the Switch Database (SDB) 4-17
The Database View 4-18
Searching the Switch Database 4-19
By MAC Address 4-19
By Port 4-19
Adding an Entry into the SDB 4-19
Deleting an Entry from the SDB 4-19
Specifying that an Entry is Permanent 4-19
Setting Up Resilient Links 4-20
Configuring Resilient Links 4-21
Creating a Resilient Link Pair 4-22
Deleting a Resilient Link Pair 4-22
Viewing the Resilient Setup 4-23
Setting Up Traps 4-25
Setting Up the Console Port 4-26
Resetting the Switch 3000 10/100 4-28
Initializing the Switch 3000 10/100 4-29
Upgrading Software 4-30
5ADVANCED MANAGEMENT
Virtual LANs (VLANs) 5-1
What are VLANs? 5-1
Benefits of VLANs 5-1
How VLANs Ease Change and Movement 5-2
How VLANs Control Broadcast Traffic 5-2
How VLANs Provide Extra Security 5-2
An Example 5-2
VLANs and the Switch 3000 10/100 5-3
The Default VLAN and Moving Ports From the Default
VLAN 5-3
Connecting VLANs to a Router 5-3
Connecting Common VLANs Between Switch Units
5-3
Using AutoSelect VLAN Mode 5-4
Using Non-routable Protocols 5-5
Using Unique MAC Addresses 5-5
Extending VLANs into an ATM Network 5-5
VLAN Configuration Example 5-6

Setting up VLANs on the Switch 3000 10/100 5-8
Assigning a Port to a VLAN When Using Port VLAN
Mode 5-9
Specifying that a Port is a VLT port 5-9
Setting Up VLANs Using AutoSelect VLAN Mode 5-10
Specifying Information About the VLAN Server 5-10
Specifying AutoSelect VLAN Mode 5-10
Spanning Tree Protocol 5-11
What is STP? 5-11
How STP Works 5-13
STP Initialization 5-13
STP Stabilization 5-13
STP Reconfiguration 5-13
An Example 5-14
STP Configurations 5-15
Enabling STP on the Switch 5-16
Configuring STP on the Switch 5-17
Configuring the STP Parameters of VLANs 5-17
Configuring the STP Parameters of Ports 5-19
RMON 5-21
What is RMON? 5-21
About the RMON Groups 5-22
Statistics 5-22
History 5-22
Alarms 5-22
Hosts 5-22
Hosts Top N 5-22
Matrix 5-23
Filter 5-23
Capture 5-23
Events 5-23
Benefits of RMON 5-24
How RMON Improves Your Efficiency 5-24
How RMON Allows Proactive Management 5-24
How RMON Reduces the Traffic Load 5-24
RMON and the Switch 5-25
RMON Features of the Switch 5-25
About Alarm Actions 5-27
About Default Alarm Settings 5-28
About the Audit Log 5-28
6STATUS MONITORING AND STATISTICS
Summary Statistics 6-2
Port Statistics 6-3
Port Traffic Statistics 6-5
Port Error Analysis 6-7
Status Monitoring 6-9
Fault Log 6-10
Remote Polling 6-11
ASAFETY INFORMATION
Important Safety Information A-1
Power Supply and Fuse A-3
Sockets for Redundant Power System (RPS) A-3
RJ45 Ports A-3
L’information de Sécurité Importante A-4
La Source de Courant et Le Fusible A-5
Socle Pour Alimentation Multiple A-6
Les Ports RJ45 A-6
Wichtige Sicherheitsinformationen A-7
Stromversorgung und Sicherung A-8
Steckdose für Redundant Power System (RPS) A-8
RJ45 Anschlußen A-8

BSCREEN ACCESS RIGHTS
CTROUBLE-SHOOTING
LEDs C-1
Using the VT100 Interface C-2
Using the Switch C-3
DPIN-OUTS
Null Modem Cable D-1
PC-AT Serial Cable D-1
Modem Cable D-2
RJ45 Pin Assignments D-2
ETECHNICAL SPECIFICATIONS
FTECHNICAL SUPPORT
Online Technical Services F-1
World Wide Web Site F-1
3Com Bulletin Board Service F-1
Access by Analog Modem F-1
Access by Digital Modem F-2
3ComFacts Automated Fax Service F-2
3ComForum on CompuServe®Online Service F-2
Support from Your Network Supplier F-3
Support from 3Com F-3
Returning Products for Repair F-4
GLOSSARY
INDEX
3COM CORPORATION LIMITED WARRANTY
ELECTRO-MAGNETIC COMPATIBILITY

ABOUT THIS GUIDE
About This Guide provides an overview of this
guide, describes the guide conventions, tells you
where to look for specific information and lists other
publications that may be useful.
Introduction
This guide provides the information you need to
install and configure a Switch 3000 10/100
(3C16942A) with v3.1 agent software. The guide is
intended for use by network administrators who
are responsible for installing and setting up net-
work equipment; consequently, it assumes a basic
working knowledge of Local Area Networks.
If the information in the Release Notes shipped
with your product differs from the information in
this guide, follow the Release Notes.
Throughout this guide, the SuperStack®II Switch
3000 10/100 is referred to as the Switch 3000
10/100 or Switch.
How to Use This Guide
This table shows where to find specific information
in this guide.
If you are looking for... Turn to...
An overview of the Switch 3000 10/100 Chapter 1
Information about installing the Switch 3000 10/100
into your network Chapter 2
Information about the methods you can use to man-
age the Switch 3000 10/100 Chapter 3
Information about managing the Switch 3000 10/100 Chapter 4
Information about more advanced management fea-
tures; for example VLANs, Spanning Tree and RMON Chapter 5
Information about monitoring the status of the
Switch 3000 10/100 Chapter 6
Safety information Appendix A
Information about the access rights for each VT100
screen Appendix B
Trouble-shooting information Appendix C
Information about the pin-outs relating to the Switch
3000 10/100 Appendix D
Information about the Technical Specifications of the
Switch 3000 10/100 Appendix E
Information about the Technical Support available
from 3Com Appendix F

2ABOUT THIS GUIDE
Conventions
Table 1 and Table 2 list conventions that are used
throughout this guide.
Related Documentation
The Switch 3000 10/100 document set includes:
■SuperStack II Switch 3000 10/100 Quick
Reference Guide.
Document Number DQA1694-2AAA0x
■SuperStack II Switch 3000 10/100 Quick
Installation Guide.
Document Number DIA1694-2AAA0x
■SuperStack II Switch 3000 10/100 Release Notes.
Document Number DNA1694-2AAA0x
Other publications you may find useful:
■Documentation accompanying the
Plug-in Modules.
■Documentation accompanying the Advanced
Redundant Power System.
Table 1 Text Conventions
Convention Description
Screen
displays This typeface represents information as it
appears on the screen.
The words
“enter”
and “type”
When you see the word “enter” in this guide,
you must type something, and then press the
Return or Enter key. Do not press the Return or
Enter key when an instruction simply says
“type.”
[Key] names Key names appear in text in one of two ways:
■Referred to by their labels, such as “the
Return key” or “the Escape key”
■Written with brackets, such as [Return] or
[Esc].
If you must press two or more keys simulta-
neously, the key names are linked with a plus
sign (+). Example:
Press [Ctrl]+[Alt]+[Del].
Menu commands
and buttons Menu commands or button names appear in
italics. Example:
From the Help menu, select Contents.
Words in italicized
type Italics emphasize a point or denote new terms at the place where they are defined in the text.
Words in
bold-face type Bold text denotes key features.
Table 2 Notice Icons
Icon Notice Type Alerts you to...
Information
note Important features or instructions
Caution Risk of personal injury, system damage,
or loss of data
Warning Risk of severe personal injury

1GETTING STARTED
About the Switch 3000 10/100
Switching is currently a leading option for increasing
performance by providing high speed backbone
links and eliminating server bottlenecks. Part of the
3Com SuperStack®II range of products, the Switch
3000 10/100 provides simple, low cost and high
performance switched connections to Ethernet and
Fast Ethernet networks.
Summary of Features
The Switch 3000 10/100 has the following features:
■Twelve auto-negotiating 10BASE-T / 100BASE-TX
ports
■Plug-in Module slot (Asynchronous Transfer
Mode (ATM) and Fast Ethernet)
■Support for up to 8160 addresses in the Switch
Database
■Store-and-forward forwarding mode ensuring
the Switch forwards all valid Ethernet frames
and discards invalid Ethernet frames such as
those with an incorrect CRC
■Intelligent Flow Management for congestion con-
trol
■Full Duplex on all ports, including Fast Ethernet
Plug-in Module ports
■Resilient Links
■Support for 16 Virtual LANs (VLANs)
■Spanning Tree Protocol (STP) per VLAN
■PACE (Priority Access Control Enabled) for sup-
porting multimedia applications over Ethernet
■3Com’s SuperStack II architecture:
■Connects to Advanced Redundant Power
System
■Integrated network management
■19-inch rack or stand-alone mounting
■SmartAgent support:
■IP and IPX management over SNMP
■RMON
■Repeater and Bridge MIB
■Broadcast storm control
■Easy software upgrades
■BOOTP for automatic IP address configuration
■Local management

1-2 CHAPTER 1: GETTING STARTED
Port Connections
10BASE-T / 100BASE-TX Ports
The Switch has 12 auto-negotiating 10BASE-T /
100BASE-TX ports configured as MDIX (cross-over).
These ports can be set to 10BASE-T, 100BASE-TX, or
they can automatically detect the speed of a link
and provide a 10Mbps connection to Ethernet
devices or a 100Mbps connection to Fast Ethernet
devices. The maximum segment length is 100m
(328ft) over category 5 twisted pair cable.
As these ports are configured as MDIX (cross-over),
you need to use a cross-over cable to connect to
devices whose ports are MDIX-only. Most of the
10BASE-T and 100BASE-TX ports in 3Com devices
are MDIX-only.
Plug-in Module
A slot at the rear of the unit can take a Plug-in
Module, providing an additional high-speed port.
This could be used, for example, to provide a Fast
Ethernet or Asynchronous Transfer Mode (ATM)
backbone connection to the rest of your network.
Switch Operation and Features
The Switch 3000 10/100 uses the same algorithm as
a conventional 802.1d bridge for filtering, forward-
ing and learning packets.
Intelligent Flow Management
Intelligent Flow Management (IFM) is a system for
controlling congestion on your network. Conges-
tion can be caused by one or more devices sending
traffic to an already busy port on the Switch 3000
10/100. If a port on the Switch 3000 10/100 is con-
nected to another switch or endstation, IFM pre-
vents packet loss and inhibits the device from
generating more packets until the period of conges-
tion ends.
IFM should be enabled on a port if it is connected
to another switch, or an endstation. IFM should be
disabled on a port connected to a repeater.
For more information about enabling IFM on a
port, refer to “Setting Up the Switch Ports” on
page 4-12.