3Com 3C16987 User manual

®
http://www.3com.com/
SuperStack®II Switch 3300 SM
User Guide
3C16987
Part No. DUA1698-7AAA01
Published May 2000

3Com Corporation
5400 Bayfront Plaza
Santa Clara, California
95052-8145
Copyright © 2000, 3Com Technologies. All rights reserved. No part of this documentation may be reproduced
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please contact 3Com and a copy will be provided to you.
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If you are a United States government agency, then this documentation and the software described herein are
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All technical data and computer software are commercial in nature and developed solely at private expense.
Software is delivered as “Commercial Computer Software” as defined in DFARS 252.227-7014 (June 1995) or
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CONTENTS
ABOUT THIS GUIDE
Conventions 8
Related Documentation 9
Year 2000 Compliance 10
Documentation Comments 10
Product Registration 10
1INTRODUCING THE SWITCH 3300 SM
About the SuperStack II Switch 3300 SM 12
Summary of Features 12
Switch 3300 SM —Front View Detail 13
10BASE-T/100BASE-TX Ports 13
1000BASE-SX Port 13
LEDs 13
Switch 3300 SM —Rear View Detail 15
Unit Information Label 15
Power Socket 15
Redundant Power System Socket 15
Console Port 16
Matrix Port 16
Network Configuration Examples 17
Switch 3300 SM as a Segmentation Switch 17
Switch 3300 SM as a Collapsed Backbone Switch 18
Switch 3300 SM as a Desktop Switch 19
Configuration Rules for Fast Ethernet 20
Configuration Rules with Full Duplex 21
Configuration Rules for Gigabit Ethernet 22
Configuration Rules for the 3300 SM 22

2INSTALLING THE SWITCH
Choosing a Suitable Site 24
Rack-mounting 24
Placing Units On Top of Each Other 25
Stacking Units 26
Stacking Two Units 26
Stacking Up To Four Units 27
The Power-up Sequence 29
Connecting a Redundant Power System 29
Powering-up the Switch 3300 SM 29
Checking for Correct Operation 29
Choosing the Correct Cables 30
Solving Problems Indicated by LEDs 31
Managing the Switch 32
ASAFETY INFORMATION
Important Safety Information 34
L’information de SécuritéImportante 36
Wichtige Sicherheitsinformationen 38
BPIN-OUTS
Null Modem Cable 41
PC-AT Serial Cable 41
Modem Cable 42
RJ45 Pin Assignments 42
CTECHNICAL SPECIFICATIONS
DTECHNICAL SUPPORT
Online Technical Services 47
World Wide Web Site 47
3Com Knowledgebase Web Services 47
3Com FTP Site 48
3Com Facts Automated Fax Service 48
Support from Your Network Supplier 48

Support from 3Com 48
Returning Products for Repair 50
GLOSSARY
INDEX
3COM CORPORATION LIMITED WARRANTY
EMC STATEMENTS

ABOUT THIS GUIDE
This guide provides all the information you need to install and use a
SuperStack®II Switch 3300 SM (3C16987) unit with default settings. If
you want to change the way the Switch works using management
software, refer to the “SuperStack II Switch Management Guide”.
The guide is intended for use by network administrators who are
responsible for installing and setting up network equipment;
consequently, it assumes a basic working knowledge of LANs (Local Area
Networks).
If the information in the release notes that are shipped with your product
differs from the information in this guide, follow the instructions in the
release notes.
Most user guides and release notes are available in Adobe Acrobat
Reader Portable Document Format (PDF) or HTML on the 3Com
World Wide Web site:
http://www.3com.com/
This guide makes reference to the SuperStack II Switch 3300 MM. This
Switch has three fixed Matrix Ports on its rear panel and can be used to
stack any 1100/3300 family Switch. Note that any 1100/3300 family
Switch fitted with a Matrix Module can also be used to stack Switches.
All the Switches mentioned in this guide are compatible with the
Switches found within the SuperStack II 1100/3300 family range.

8ABOUT THIS GUIDE
Conventions Table 1 and Table 2 list conventions that are used throughout this guide.
Ta b le 1 Notice Icons
Icon Notice Type Description
Information note Information that describes important features or
instructions
Caution Information that alerts you to potential loss of data or
potential damage to an application, system, or device
Warning Information that alerts you to potential personal injury
Ta b le 2 Text Conventions
Convention Description
Screen displays This typeface represents information as it appears on the
screen.
Syntax The word “syntax”means that you must evaluate the syntax
provided and then supply the appropriate values for the
placeholders that appear in angle brackets. Example:
To change your password, use the following syntax:
system password <password>
In this example, you must supply a password for
<password>.
Commands The word “command”means that you must enter the
command exactly as shown and then press Return or Enter.
Commands appear in bold. Example:
To display port information, enter the following
command:
bridge port detail
The words “enter”
and “type”When you see the word “enter”in this guide, you must type something, and then press Return or Enter. Do not press
Return or Enter when an instruction simply says “type.”
Keyboard key names If you must press two or more keys simultaneously, the key
names are linked with a plus sign (+). Example:
Press Ctrl+Alt+Del

Related Documentation 9
Related
Documentation In addition to this guide, each Switch 3300 SM document set includes the
following:
■Management Guide
This guide contains all the management information for the Switch.
■Quick Reference Guide
This guide contains a quick summary of the hardware and software
information for the Switch.
■Quick Installation Guide
This guide contains a summary of the package contents, and a quick
summary of the installation information for the Switch.
■Release Notes
These notes provide information about the current software release,
including new features, modifications, and known problems.
■SuperStack II Switch Help
This help provides information about the web interface software of
the Switch. It is supplied on the SuperStack II Switch CD-ROM.
■SuperStack II Switch README File
This file provides information about the current software release,
including new features, modifications, and known problems. It is
supplied on the SuperStack II Switch CD-ROM.
Words in italics Italics are used to:
■Emphasize a point.
■Denote a new term at the place where it is defined in the
text.
■Identify menu names, menu commands, and software
button names. Examples:
From the Help menu, select Contents.
Click OK.
Ta b le 2 Text Conventions (continued)
Convention Description

10 ABOUT THIS GUIDE
In addition, there are other publications you may find useful:
■Documentation accompanying the Advanced Redundant Power
System.
Year 2000
Compliance For information on Year 2000 compliance and 3Com products, visit the
3Com Year 2000 Web page:
http://www.3com.com/products/yr2000.html
Documentation
Comments Your suggestions are very important to us. They will help make our
documentation more useful to you. Please e-mail comments about this
document to 3Com at:
[e-mail]
Please include the following information when commenting:
■Document title
■Document part number (on the title page)
■Page number (if appropriate)
Example:
■SuperStack II Switch 3300 SM User Guide
■Part Number DUA1698-7AAA01
■Page 21
Product
Registration You can now register your SuperStack II Switch on the 3Com web site to
receive up-to-date information on your product:
■http://www.3com.com/productreg/pdd

1INTRODUCING THE SWITCH 3300 SM
This chapter contains introductory information about the Switch and how
it can be used in your network. It covers the following topics:
■About the SuperStack II Switch 3300 SM
■Switch 3300 SM —Front View Detail
■Switch 3300 SM —Rear View Detail
■Network Configuration Examples
■Configuration Rules for Fast Ethernet
■Configuration Rules with Full Duplex
■Configuration Rules for Gigabit Ethernet
■Configuration Rules for the 3300 SM

12 CHAPTER 1: INTRODUCING THE SWITCH 3300 SM
About the
SuperStack II
Switch 3300 SM
The SuperStack®II Switch 3300 SM connects:
■your existing 10Mbps devices.
■high-performance workgroups with a 100Mbps or 1000Mbps
backbone or server connection.
■users to dedicated 100Mbps ports in one switch.
In addition, as part of the 3Com®SuperStack II range of products, you
can combine it with any SuperStack II system as your network grows.
Summary of Features The Switch has the following hardware features:
■24 Fast Ethernet auto-negotiating 10BASE-T/100BASE-TX ports
■1000BASE-SX Gigabit Ethernet port
■One Matrix Port for connecting units in the Switch 1100/3300 family
to form a stack. This enables you to:
■Connect two units back-to-back using a single Matrix Cable
■Stack the Switch with up to three other units in the Switch
1100/3300 family, when one of the units is a Switch 3300 MM unit
■SuperStack II architecture
■Connects to Redundant Power System/Advanced Redundant
Power System
■19-inch rack or stand-alone mounting
For information about the software features of the Switch, refer to the
“SuperStack II Switch Management Guide”.

Switch 3300 SM —Front View Detail 13
Switch 3300 SM —
Front View Detail Figure 1 Switch 3300 SM —front view
10BASE-T/
100BASE-TX Ports
The Switch has 24 auto-negotiating 10BASE-T/100BASE-TX ports
configured as MDIX (cross-over). These ports can be set to 10BASE-T half
duplex, 10BASE-T full duplex, 100BASE-TX half duplex, 100BASE-TX full
duplex, or they can automatically detect the speed and duplex mode of a
link and provide the appropriate connection. 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. See
“Choosing the Correct Cables”on page 30 for more information.
1000BASE-SX Port The Switch has a Gigabit Ethernet Port that provides a 1000Mbps
connection to another Gigabit Ethernet device. This port uses 62.5 µm or
50 µm multimode fiber optic cable with MT-RJ duplex connectors.
LEDs Table 3 (overleaf) lists the LEDs visible on the front of the Switch, and
their states according to color. For information on using the LEDs for
problem solving, see “Solving Problems Indicated by LEDs”on page 31.
green
flashing green
= enabled, link OK
= disabled, link OK
10BASE-T / 100BASE-TX
Unit
3
3
4
4
6
6
5
5
7
7
8
8
9
9
10
10
11
11
12
12
1
1
2
23
5
1
4
7
6
8
2
13
13
14
14
15
15
16
16
17
17
18
18
19
19
20
20
21
21
22
22
23
23
24
24
SuperStack II
Switch 3300 SM
®
Power/Self Test
6x 7x
18x 19x
1x
13x
12x
24x
Packet
Status
Packet
Status
1000BASE-SX
10BASE-T / 100BASE-TX Ports Port Status LEDs Power / Self Test LED
Unit LED
1000BASE-SX Port

14 CHAPTER 1: INTRODUCING THE SWITCH 3300 SM
Ta b le 3 LED behavior
LED Color Indicates
Port Status LEDs
Packet Yellow Packets are being transmitted/received on the port.
Off No packets are being transmitted/received on the
port.
Status Green A link is present, and the port is enabled.
Green flashing A link is present, but the port is disabled.
Off No link is present.
Unit LEDs
1–8Green The Switch forms a stack with other Switch units;
the LED indicates the position of the Switch in the
stack and that a link is present. Note that although
there are eight LEDs, only four Switch units can be
stacked at present.
Off The Switch is stand-alone.
Power/Self Test LED
Green The Switch is powered-up.
Green flashing The Switch is either downloading software or is
initializing (which includes running a Power On Self
Test).
Yellow The Switch has failed its Power On Self Test.
Off The Switch is not receiving power.

Switch 3300 SM —Rear View Detail 15
Switch 3300 SM —
Rear View Detail Figure 2 Switch 3300 SM —rear view
Unit Information
Label
This label shows the following:
■The 3Com product name of the Switch
■The 3Com 3C number of the Switch
■The unique MAC address (Ethernet address) of the Switch
■The serial number of the Switch
You may need this information for fault reporting purposes.
Power Socket The Switch automatically adjusts its power setting to any supply voltage
in the range 90–240V A.C.
Redundant Power
System Socket
To protect against internal power supply failure, you can use this socket
to connect a SuperStack II Advanced Redundant Power System (ARPS) to
the Switch. See “Connecting a Redundant Power System”on page 29.
Matrix Port
Console
(max) 19200,8,1,N
Switch 3300 SM 24 Port
MAC Addr: XXXXXXXXXX
3C16987
Serial XXXXXXXXXXXX
Power Socket
Unit Information Label
Redundant Power System Socket Console Port Matrix Port

16 CHAPTER 1: INTRODUCING THE SWITCH 3300 SM
Console Port The console port allows you to connect a terminal and perform remote or
local out-of-band management. The console port uses standard null
modem cable and is set to auto-baud, 8 data bits, no parity and 1 stop
bit.
Matrix Port The Matrix Port allows you to:
■Stack the Switch with another unit in the Switch 1100/3300 family
using a single Matrix Cable
■Stack the Switch with up to three other units in the Switch 1100/3300
family, when one of the units is a Switch 3300 MM unit
For more information about the role of the Matrix Port, see “Stacking
Units”on page 26.

Network Configuration Examples 17
Network
Configuration
Examples
The following illustrations show some examples of how the Switch can be
used in your network.
Switch 3300 SM as a
Segmentation Switch
The example in Figure 3 shows how a Switch 3300 SM stack can segment
a network of shared 10Mbps,100Mbps and 1000Mbps connections.
There is a 10/100 shared segment on each floor, and these segments are
connected to the Switch which is positioned in the basement. The Switch
3300 SM also provides a Gigabit Ethernet connection to a local server.
Figure 3 Using the Switch to segment your network
Dual Speed Hub 500
Dual Speed Hub 500
Endstations on shared 10Mbps
and 100Mbps connections
Endstations on shared 10Mbps
and 100Mbps connections
Endstations and servers on switched 10Mbps,
100Mbps and 1000Mbps connections
Local server on a shared
100Mbps connection
Local server on a shared
100Mbps connection
100Mbps
Switch 3300 SM stack
1000Mbps

18 CHAPTER 1: INTRODUCING THE SWITCH 3300 SM
Switch 3300 SM as a
Collapsed Backbone
Switch
The example in Figure 4 shows how a Switch 3300 SM stack can act as a
backbone for both shared and switched network segments.
Figure 4 Using the Switch as a collapsed backbone
Switch 3300 SM stack
Endstations on
switched 10Mbps
connections
Endstations on switched
10Mbps connections Servers on dedicated
1000Mbps connections
Switch 1100
Switch 1100
Dual Speed Hub 500
Dual Speed Hub 500
Endstations on
switched 10Mbps
connections
Endstations on
shared 10Mbps
and 100Mbps
connections
Endstations on
shared 10Mbps
and 100Mbps
connections
100Mbps

Network Configuration Examples 19
Switch 3300 SM as a
Desktop Switch
The example in Figure 5 shows how a Switch 3300 SM can be used,
within a stack, for a group of users that require dedicated 10Mbps or
100Mbps connections to the desktop. The 3300 SM Switches provide a
Gigabit Ethernet connection to a SuperStack II Switch 9300 in the
basement and to a local server.
Figure 5 Using the Switch in a desktop environment
Switch 9300
Endstations on switched 10Mbps
or 100Mbps connections
Local server on a switched
1000Mbps connection
Switch 3300:
1000Mbps
MM
XM
SM
SM

20 CHAPTER 1: INTRODUCING THE SWITCH 3300 SM
Configuration Rules
for Fast Ethernet The topology rules for 100Mbps Fast Ethernet are slightly different to
those for 10Mbps Ethernet. Figure 6 illustrates the key topology rules and
provides examples of how they allow for large-scale Fast Ethernet
networks.
Figure 6 Fast Ethernet configuration rules