3com SuperStack 3 NBX User manual

Category
Network switches
Type
User manual
http://www.3com.com/
Part No. DUA1730-0AAA03
Published July 2005
SuperStack
®
3
Switch 4200 Family
Getting Started Guide
Switch 4200 26-Port (3C17300A)
Switch 4200 50-Port (3C17302A)
Switch 4200 28-Port (3C17304A)
DUA1730-0AAA03.book Page 1 Thursday, November 17, 2005 12:17 PM
3Com Corporation
350 Campus Drive
Marlborough, MA
01752-3064
Copyright © 2002, 2005 3Com Corporation. 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 written permission from 3Com Technologies.
3Com Corporation 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 Corporation provides this documentation without warranty, term, or condition of any kind, either
implied or expressed, including, but not limited to, the implied warranties, terms or conditions of
merchantability, satisfactory quality, 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.
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 or !LICENSE.TXT. If you are unable to locate a copy,
please contact 3Com and a copy will be provided to you.
UNITED STATES GOVERNMENT LEGEND
If you are a United States government agency, then this documentation and the software described herein are
provided to you subject to the following:
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
as a “commercial item” as defined in FAR
2.101(a) and as such is provided with only such rights as are
provided in 3Com’s standard commercial license for the Software. Technical data is provided with limited rights
only as provided in DFAR 252.227-7015 (Nov
1995) or FAR 52.227-14 (June 1987), whichever is applicable.
You agree not to remove or deface any portion of any legend provided on any licensed program or
documentation contained in, or delivered to you in conjunction with, this User Guide.
Unless otherwise indicated, 3Com registered trademarks are registered in the United States and may or may not
be registered in other countries.
3Com, the 3Com logo and SuperStack are all registered trademarks of 3Com Corporation.
Novell and NetWare are registered trademarks of Novell Incorporated.
Adobe and Acrobat are registered trademarks of Adobe Systems Incorporated.
All other company and product names may be trademarks of the respective companies with which they are
associated.
Environmental Statement
It is a 3Com policy to be environmentally friendly in all operations. This manual is printed on paper that comes
from sustainable, managed European forests. The production process for making the pulp has a reduced AOX
level (adsorbable organic halogen) resulting in elemental chlorine-free paper.
The paper is fully biodegradable and recyclable.
DUA1730-0AAA03.book Page 2 Thursday, November 17, 2005 12:17 PM
CONTENTS
ABOUT THIS GUIDE
Conventions 8
Related Documentation 9
Accessing Online Documentation 10
Documentation Comments 10
1 INTRODUCING THE
SUPERSTACK 3 SWITCH 4200 FAMILY
About the Switch 4200 Family 12
Summary of Hardware Features 12
Switch 4200 Family — Front View Detail 13
10BASE-T/ 100BASE-TX Ports 14
10/100/1000BASE-T Ports 14
SFP Ports 14
LEDs 15
Switch 4200 Family — Rear View Detail 16
Power Socket 16
Console Port 16
Default Settings 17
2 INSTALLING THE SWITCH
Package Contents 20
Choosing a Suitable Site 20
Rack-mounting 21
Placing Units On Top of Each Other 23
Stacking Units 23
The Power-up Sequence 24
Powering-up the Switch 4200 Family 24
Checking for Correct Operation of LEDs 24
SFP Operation 25
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Approved SFP Transceivers 25
Inserting an SFP Transceiver 26
Removing an SFP Transceiver 27
Choosing the Correct Cables 27
Choosing the Correct Fiber Cables 28
3 SETTING UP FOR MANAGEMENT
Setting Up Overview 32
IP Configuration 33
Preparing for Management 34
Manually Configuring IP Information 35
Connecting to a Front Panel Port 35
Connecting to the Console Port 38
Viewing Automatically Configured IP Information 42
Using 3Com Network Supervisor 42
Connecting to the Console Port 42
Methods of Managing a Switch 45
Command Line Interface Management 45
Web Interface Management 46
SNMP Management 46
Setting Up Command Line Interface Management 47
CLI Management via the Console Port 47
CLI Management over the Network 47
Setting Up Web Interface Management 48
Pre-requisites 48
Web Management Over the Network 49
Setting Up SNMP Management 49
Pre-requisites 50
Default Users and Passwords 50
Changing Default Passwords 51
4 PROBLEM SOLVING
Solving Problems Indicated by LEDs 54
Solving Hardware Problems 54
Solving Communication Problems 55
Solving Stack Formation Problems 56
Solving Software Upgrade Problems 56
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A SAFETY INFORMATION
Important Safety Information 58
L’information de Sécurité Importante 60
Wichtige Sicherheitsinformationen 62
Información de seguridad importante 64
Importanti informazioni di sicurezza 66
B PIN-OUTS
Null Modem Cable 69
PC-AT Serial Cable 69
Modem Cable 70
RJ-45 Pin Assignments 70
C TECHNICAL SPECIFICATIONS
Switch 4200 26-Port
(3C17300A) 73
Switch 4200 50-Port
(3C17302A) 74
Switch 4200 28-Port
(3C17304A) 75
D OBTAINING SUPPORT FOR YOUR PRODUCT
Register Your Product 77
Purchase Value-Added Services 77
Troubleshoot Online 78
Access Software Downloads 78
Telephone Technical Support and Repair 78
Contact Us 79
REGULATORY NOTICES
INDEX
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DUA1730-0AAA03.book Page 6 Thursday, November 17, 2005 12:17 PM
ABOUT THIS GUIDE
This guide provides all the information you need to install and use a
SuperStack
®
3 Switch 4200 in its default state.
This guide is intended for use with the following Switch 4200 Family
models:
Switch 4200 26-Port (3C17300A) — 24 10BASE-T/100BASE-TX ports,
2
10/100/1000BASE-T ports
Switch 4200 50-Port (3C17302A) — 48 10BASE-T/100BASE-TX ports,
2
10/100/1000BASE-T ports
Switch 4200 28-Port (3C17304A) — 24 10BASE-T/100BASE-TX ports,
2
10/100/1000BASE-T ports and 2 SFP ports
All procedures described in this guide apply to all models except where
stated.
For details on the Switch 4226T (3C17300), Switch 4250T (3C17302) and
Switch 4228G (3C17304), refer to the following document:
SuperStack 3 Switch 4200 Family Getting Started Guide (part number
DUA1730-0AAA04)
available for download from the 3Com Web site, www.3Com.com.
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
differ from the information in this guide, follow the instructions in the
release notes.
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8 ABOUT THIS GUIDE
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/
Conventions Tab le 1 and Tab le 2 list conventions that are used throughout this guide.
Table 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
Table 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
DUA1730-0AAA03.book Page 8 Thursday, November 17, 2005 12:17 PM
Related Documentation 9
Related
Documentation
In addition to this guide, each Switch documentation set includes the
following:
SuperStack 3 Switch Implementation Guide
This guide contains information on the features supported by your
Switch and how they can be used to optimize your network. It is
supplied in PDF format on the CD-ROM that accompanies the Switch.
SuperStack 3 Switch Management Quick Reference Guide
This guide contains:
a list of the software features supported by the Switch.
a summary of the web interface and command line interface
commands for the Switch.
SuperStack 3 Switch Management Interface Reference Guide
This guide provides detailed information about the web interface and
command line interface that enable you to manage the Switch. It is
supplied in HTML format on the CD-ROM that accompanies the
Switch.
Release Notes
These notes provide information about the current software release,
including new features, modifications, and known problems.
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.
Table 2 Text Conventions (continued)
Convention Description
DUA1730-0AAA03.book Page 9 Thursday, November 17, 2005 12:17 PM
10 ABOUT THIS GUIDE
There are other publications you may find useful, such as:
Documentation accompanying 3Com Network Supervisor. You can
download 3Com Network Supervisor and supporting documentation
from the 3Com Web site at:
www.3com.com/3ns
Accessing Online
Documentation
The CD-ROM supplied with your Switch contains the following online
documentation:
SuperStack 3 Switch Management Quick Reference Guide (PDF
format)
SuperStack 3 Switch Implementation Guide (PDF format)
SuperStack 3 Switch Management Interface Reference Guide (HTML
format)
1 To access the documentation insert the CD-ROM into your CD-ROM
drive. If your PC has auto-run enabled, a splash screen will be displayed
automatically.
2 Select the Documentation section from the contents page.
If the online documentation is to be accessed from a local drive or server,
you will need to access the CD-ROM contents via the root directory and
copy the files from the CD-ROM to a suitable directory.
The HTML Reference Guide is stored in the Docs/reference
directory on the CD-ROM. The documentation is accessed using the
index.htm file.
The PDF Quick Reference Guide and PDF Implementation Guide are
stored in the Docs/implementation directory of the CD-ROM.
3Com recommends that you copy the Docs/reference directory as a
whole to maintain the structure of the files.
DUA1730-0AAA03.book Page 10 Thursday, November 17, 2005 12:17 PM
1
INTRODUCING THE
SUPERSTACK 3 SWITCH 4200
FAMILY
This chapter contains introductory information about the Switch 4200
Family and how it can be used in your network. It covers summaries of
hardware and software features and also the following topics:
About the Switch 4200 Family
Switch 4200 Family — Front View Detail
Switch 4200 Family — Rear View Detail
Default Settings
This Getting Started Guide describes the following units in the Switch
4200 Family:
Switch 26-Port (3C17300A)
Switch 50-Port (3C17302A)
Switch 28-Port (3C17304A)
For details on the Switch 4226T (3C17300), Switch 4250T (3C17302) and
Switch 4228G (3C17304), refer to the following document:
SuperStack 3 Switch 4200 Family Getting Started Guide (part number
DUA1730-0AAA04)
available for download from the 3Com Web site, www.3Com.com.
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12 CHAPTER 1: INTRODUCING THE SUPERSTACK 3 SWITCH 4200 FAMILY
About the Switch
4200 Family
The Switch 4200 Family are stackable 10/100/1000 Mbps devices which
consist of:
24 or 48 10BASE-T/100BASE-TX ports
2 10/100/1000BASE-T ports
2 SFP ports (Switch 4200 28-Port only)
The Switch provides high-performance workgroups with a backbone to
server connection. You can also add the Switch 4200 Family to any
SuperStack
®
system as your network grows.
Summary of
Hardware Features
Tab le 3 summarizes the hardware features that are supported by the
Switch 4200 Family.
Table 3 Hardware features
Feature Switch 4200 Family
Addresses Up to 8000 supported
Up to 64 permanent entries
Auto-negotiation Supported on all ports
Auto MDI/MDI-X
Forwarding Modes Store and Forward
Duplex Modes Half and full duplex on all 10/100 ports. Full duplex
on 1000BASE-T ports and full duplex on SFP ports
Flow Control In full duplex operation all ports are supported
Smart Auto-sensing Supported on all ports except SFP ports which are
single speed ports.
Traffic Prioritization Supported (IEEE 802.ID): 2 queues per port
Ethernet and Fast Ethernet
Ports
Auto-negotiating 10BASE-T/100BASE-TX ports
Gigabit Ethernet Auto-negotiating 10/100/1000BASE-T ports
SFP Gigabit Ethernet Ports Supports fiber Gigabit Ethernet short-wave (SX),
long-wave (LX), long-haul (LH70) and copper (T)
transceivers in any combination (Switch 4200
28-Port only)
Mounting 19-inch rack or stand-alone mounting
DUA1730-0AAA03.book Page 12 Thursday, November 17, 2005 12:17 PM
About the Switch 4200 Series 13
Switch 4200 Family
— Front View
Detail
Figure 1 Switch 4200 26-Port (3C17300A) — front view
Figure 2 Switch 4200 50-Port (3C17302A) — front view
Figure 3 Switch 4200 28-Port (3C17304A) — front view
3C17300A Superstack 3 Switch 4200 26-Port
10BASE-T / 100BASE-TX
RJ-45 Ports
Power/
Self Test
Alert
Alert LED
21
91022
11
23 12 24
8
20
1
13
197
18
6
17
5
16
4
153
14
2
10/100/1000BASE-T
ports
26 / Down
25 / Up
Power / Self Test LED
Unit LEDs
1
2
3
4
Unit
3C17302A Superstack 3 Switch 4200 50-Port
10BASE-T / 100BASE-TX
RJ-45 Ports
Power / Self Test LED
Alert LED
8
32
1
25
31
7
30
6295
28
427
3
26
2
49
50
16
40
9
33
39
15
38
14
37
13361235
11
34
10
24
48
17
41
47
23462245
21
44
20
43
19
42
18
10/100/1000BASE-T
ports
Unit LEDs
Up
Down
Alert
Power/
Self Test
Unit
1
2
3
4
3C17304A Superstack 3 Switch 4200 28-Port
10BASE-T / 100BASE-TX
RJ-45 Ports
Power/
Self Test
Alert
21
91022
11
23 12 24
8
20
1
13
197
18
6
17
5
16
4
153
14
2
10/100/1000BASE-T
ports
26 / Down
25 / Up
Power / Self Test LED
Unit LEDs
1
2
3
4
Unit
27
28
27
28
Alert LEDAlert LED
SFP Ports
DUA1730-0AAA03.book Page 13 Thursday, November 17, 2005 12:17 PM
14 CHAPTER 1: INTRODUCING THE SUPERSTACK 3 SWITCH 4200 FAMILY
WARNING: RJ-45 Ports. These are shielded RJ-45 data sockets. They cannot
be used as standard traditional telephone sockets, or to connect the unit to a
traditional PBX or public telephone network. Only connect RJ-45 data
connectors, network telephony systems, or network telephones to these
sockets.
Either shielded or unshielded data cables with shielded or unshielded
jacks can be connected to these data sockets.
10BASE-T/
100BASE-TX Ports
The Switch has 24 or 48 auto-negotiating 10BASE-T/100BASE-TX ports
configured as Auto MDIX (cross-over). While auto-negotiation is enabled,
these ports can automatically detect whether they need to operate in
MDI or MDIX mode. Alternatively, you can manually set these ports to
10BASE-T half duplex, 10BASE-T full duplex, 100BASE-TX half duplex or
100BASE-TX full duplex. The maximum segment length is 100
m (328 ft)
over Category 5 twisted pair cable.
10/100/1000BASE-T
Ports
The Switch has two auto-negotiating 10/100/1000BASE-T ports
configured as Auto MDIX (cross-over). While auto-negotiation is enabled,
these ports can automatically detect whether they need to operate in
MDI or MDIX mode. These ports provide 10/100/1000
Mbps full duplex
connections to other Gigabit Ethernet devices. Full duplex allows packets
to be transmitted and received simultaneously which, in effect, doubles
the potential throughput of a link. These ports require either
straight-through or cross-over Category
5 cables with RJ-45 connectors at
both ends. The maximum UTP cable length is 100 m (328
ft) over
Category 5 cable.
The 10/100/1000BASE-T ports will auto-negotiate to the appropriate
speed.
SFP Ports This section applies to the SuperStack 3 Switch 4200 28-Port only.
The two SFP (Small Form Factor Pluggable) ports support fiber Gigabit
Ethernet short-wave (SX), long-wave (LX), long-haul (LH70) and
copper (T) transceivers in any combination. This offers you the flexibility
of using SFP transceivers to provide connectivity between the Switch and
remote 1000 Mbps workgroups or to create a high capacity aggregated
link backbone connection.
The SFP ports are capable of auto-negotiating flow control. As the speed
and duplex modes are fixed by the media type, only the flow control is
DUA1730-0AAA03.book Page 14 Thursday, November 17, 2005 12:17 PM
About the Switch 4200 Series 15
negotiated with the link partner. Alternatively, auto-negotiation can be
disabled and the flow control setting can be manually configured.
LEDs Tab le 4 lists LEDs visible on the front of the Switch, and how to read their
status according to color. For information on using the LEDs for problem
solving, see
“Solving Problems Indicated by LEDs” on page 54.
It is not possible to determine the duplex mode from the LEDs. For more
detailed information, refer to the “SuperStack
3 Switch Management
Interface Reference Guide” on the CD-ROM that is supplied with the
Switch.
Table 4 LED behavior
LED Color Indicates
Port Status LEDs 10BASE-T/100BASE-TX ports
Green A 100 Mbps link is present and the port is enabled.
Green flashing Packets are being transmitted/received on the port.
Yellow A 10 Mbps link is present and the port is enabled.
Yellow flashing Packets are being transmitted/received on the port.
Green / Yellow
alternating
A 10 or 100 Mbps link is present, but the port is disabled.
Off No link is present.
Port Status LEDs SFP ports
Green A 1000 Mbps link is present and the port is enabled.
Green flashing Packets are being transmitted/received on the port.
Port Status LEDs 10/100/1000BASE-T ports
Green A 1000 Mbps link is present and the port is enabled.
Green flashing Packets are being transmitted/received on the port.
Yellow A 10 or 100 Mbps link is present and the port is enabled.
Yellow flashing Packets are being transmitted/received on the port.
Green / Yellow
alternating
A 10, 100 or 1000 Mbps link present but disabled.
Off No link is present.
Unit LEDs
1–4 Green When the Switch forms a stack with other Switch 4200
Family units the LED indicates the position of the unit in the
stack and that a link is present. Unit LED number 1 can also
indicate a stand-alone Switch.
Off The Switch initialization process is not complete.
DUA1730-0AAA03.book Page 15 Thursday, November 17, 2005 12:17 PM
16 CHAPTER 1: INTRODUCING THE SUPERSTACK 3 SWITCH 4200 FAMILY
Switch 4200 Family
— Rear View Detail
Figure 4 Switch 4200 Family — rear view
Power Socket The Switch automatically adjusts its power setting to any supply voltage
in the range 100-240 VAC.
Console Port The console port allows you to connect a terminal and perform remote or
local out-of-band management. The console port uses a standard null
modem cable and is set to auto-baud, 8 data bits, no parity and 1 stop
bit.
The Switch 4226T, Switch 4250T and Switch 4228G have a Redundant
Power Supply (RPS) connector on the rear panel. Refer to the
documentation supplied with these models for details.
Power/Self Test LED
Green The Switch is powered-up and operating normally.
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.
Refer to Chapter 4 Solving Problems Indicated by LEDs.
Off The Switch is not receiving power or there is a fault with the
Power Supply Unit.
Alert LED
Green flashing The Switch Alert LED has been configured via the CLI or Web
Interface to flash.
Off The Switch Alert LED has been configured via the CLI or Web
Interface to be off (Default state).
LED Color Indicates
Power Socket
Console
(max) 19200,8,1,N
Console Port
Supply Data Warning Label
DUA1730-0AAA03.book Page 16 Thursday, November 17, 2005 12:17 PM
About the Switch 4200 Series 17
Default Settings Tab le 5 shows the default settings for the Switch 4200 Family:
Table 5 Default Settings
If you initialize a Switch unit by selecting System > Control > Initialize in
the Web interface or by entering system control initialize
in
the Command Line Interface, the following settings are retained to allow
you to connect to and manage the Switch:
IP Address
Subnet Mask
Default Router
Feature Switch 4200 Family
Automatic IP Configuration Enabled
Port Status Enabled
Port Speed All ports are auto-negotiated, except SFP ports
Duplex Mode All ports are auto-negotiated, except SFP ports
Flow Control Enabled in half duplex
Auto-negotiated in full duplex
Broadcast Storm Control Enabled
Virtual LANs (VLANs) All ports belong to the untagged Default VLAN
(VLAN
1) with IEEE802.1Q learning operational
IP Multicast Filtering Filtering enabled
Rapid Spanning Tree Protocol
Fast Start
Enabled
Enabled on all 10/100 Mbps ports
Disabled on all 1000 Mbps ports
RMON Alarm Enabled
Smart Auto-Sensing Enabled
LACP (10/100/1000BASE-T ports and SFP ports only)
Disabled
Quality of Service (QoS) All ports prioritize NBX VoIP IP.
All ports set to “best effort” for all other traffic.
HOL Protection (QoS) 18 Kb
DUA1730-0AAA03.book Page 17 Thursday, November 17, 2005 12:17 PM
18 CHAPTER 1: INTRODUCING THE SUPERSTACK 3 SWITCH 4200 FAMILY
DUA1730-0AAA03.book Page 18 Thursday, November 17, 2005 12:17 PM
2
INSTALLING THE SWITCH
This chapter contains the information you need to install and set up the
Switch 4200 Family. It covers the following topics:
Package Contents
Choosing a Suitable Site
Rack-mounting
Placing Units On Top of Each Other
The Power-up Sequence
SFP Operation
Choosing the Correct Cables
WARNING: Safety Information. Before installing or removing any
components from the Switch 4200 Family or carrying out any
maintenance procedures, you must read the safety information provided
in
Appendix A of this guide.
AVERTISSEMENT: Consignes de sécurité. Avant d'installer ou d'enlever
tout composant du Switch 4200 ou d'entamer une procédure de
maintenance, lisez les informations relatives à la sécurité qui se trouvent
dans l'Appendice A de ce guide.
VORSICHT: Sicherheitsinformationen. Bevor Sie Komponenten aus
dem Switch 4200 entfernen oder dem Switch 4200 hinzufuegen oder
Instandhaltungsarbeiten verrichten, lesen Sie die Sicherheitsanweisungen,
die in Appendix A (Anhang A) in diesem Handbuch aufgefuehrt sind.
ADVERTENCIA: Información de seguridad. Antes de instalar o extraer
cualquier componente del product o de realizar tareas de mantenimiento,
debe leer la información de seguridad facilitada en el Apéndice A de esta
guía del usuario.
AVVERTENZA: Informazioni di sicurezza. Prima di installare o
rimuovere qualsiasi componente dal product o di eseguire qualsiasi
DUA1730-0AAA03.book Page 19 Thursday, November 17, 2005 12:17 PM
20 CHAPTER 2: INSTALLING THE SWITCH
procedura di manutenzione, leggere le informazioni di sicurezza riportate
nell'Appendice A della presente guida per l'utente.
Package Contents Switch unit
CD-ROM
Getting Started Guide (this guide)
Release Notes
Unit Information Labels
Warranty Information
Power Cord
2 x Mounting brackets
4 x Screws
4 x Rubber feet
Choosing a Suitable
Site
The Switch is suited for use on a desktop, either free standing or
mounted in a standard 19-inch equipment rack. Alternatively, the Switch
can be mounted in a wiring closet or equipment room, as an aggregator
for other Hubs and Switches. A rack-mounting kit containing two
mounting brackets is supplied with the Switch.
CAUTION: Ensure that the ventilation holes are not obstructed.
When deciding where to position the Switch, ensure that:
Cabling is located away from:
sources of electrical noise such as radios, transmitters and
broadband amplifiers.
power lines and fluorescent lighting fixtures
The Switch is accessible and cables can be connected easily.
Water or moisture cannot enter the case of the Switch.
Air-flow is not restricted around the Switch or through the vents in the
side of the Switch. 3Com recommends that you provide a minimum of
25mm (1in.) clearance.
Air temperature around the Switch does not exceed 40 °C (104 °F).
DUA1730-0AAA03.book Page 20 Thursday, November 17, 2005 12:17 PM
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3com SuperStack 3 NBX User manual

Category
Network switches
Type
User manual

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