3COM FAMILY 4500 User Manual

SuperStack® 3

Switch 4500 Family

Getting Started Guide

Switch 4500 26-Port (3CR17561-91)

Switch 4500 50-Port (3CR17562-91)

Switch 4500 PWR 26-Port (3CR17571-91)

Switch 4500 PWR 50-Port (3CR17572-91)

http://www.3com.com/

Part No. DUA1756-1AAA01

Published August 2005

3Com Corporation

350 Campus Drive

Marlborough,

MA 01752-3064

Copyright © 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 Corporation.

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 Corporation 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 registered trademarks of 3Com Corporation.

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Establishing environmental performance standards that comply with national legislation and regulations.

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ENCRYPTION

This product contains encryption and may require U.S. and/or local government authorization prior to export or import to another country.

CONTENTS

ABOUT THIS GUIDE

Before You Start	7
Release Notes	7
About Your CD-ROM		8
Conventions 8
Related Documentation		9

Accessing Online Documentation 10

Documentation Comments 10

1INTRODUCING THE

SUPERSTACK 3 SWITCH 4500 FAMILY

	About the Switch 4500		14
	Summary of Hardware Features			15
	Switch 4500 — Front View Detail			15
	10BASE-T/ 100BASE-TX Ports			16
	1000BASE-X SFP Ports		17
	Console Port	17
	Unit LED 18
	LEDs 18
	Switch 4500 — Rear View Detail			20
	Power Socket	20
	Open Book Warning Labels 20
	Redundant Power System Socket 21
	Default Settings	21
2 INSTALLING THE SWITCH
	Package Contents	24
	Choosing a Suitable Site		25
	Rack-mounting	26

Rack Mounting the Back of your Switch 4500 (PWR only) 27

	Connecting a Redundant Power Supply to your Switch 4500 PWR									28
	Specifying the Redundant Power System							30
	Connecting the Switch to the Redundant Power System 31
	Connecting the Earthing Cable					33
	RPS LED	33
	Using Power over Ethernet				33
	Placing Units On Top of Each Other					34
	The Power-up Sequence			35
	Powering-up the Switch 4500					35
	Checking for Correct Operation of LEDs							35
	Choosing the Correct Cables				35
	Choosing the Correct Cables for the 1000BASE-X SFP Ports									37
	SFP Operation	38
	Approved SFP Transceivers				38
	Inserting an SFP Transceiver				39
	Removing an SFP Transceiver				40
	Packing and Shipping the Switch 4500						40
3 SETTING UP FOR MANAGEMENT
	Methods of Managing a Switch				44
	Command Line Interface Management							44
	Command Line Interface Management using SSH 45
	Web Interface Management				45
	SNMP Management			45
	Setting Up Overview		46
	IP Configuration		47
	Preparing for Management				48
	Manually Configuring IP Information					49
	Connecting to the Console Port					49
	Connecting to a Front Panel Port					52
	Viewing Automatically Configured IP Information								55
	Using 3Com Network Director					56
	Connecting to the Console Port					56
	Setting Up Command Line Interface Management								58
	User Interface Overview 58
	CLI Management via the Console Port							58
	CLI Management over the Network						58

	Setting Up Command Line Interface Management using SSH 59
	Setting Up Web Interface Management				60
	Pre-requisites	60
	Web Management Over the Network				61
	Setting Up SNMP Management V1 or V2				61
	Pre-requisites	62
	Default Users and Passwords		62
4
	CREATING A STACK
	How to Interconnect Units		65
	Guidelines For Interconnecting Units 66
	Unit Numbering within the Stack			67
5
	PROBLEM SOLVING
	Solving Problems Indicated by LEDs			70
	Solving Hardware Problems		71
	Solving Communication Problems			73
	Solving Stack Formation Problems			75
6
	UPGRADING SOFTWARE
	The Contents of the Executable File			78
	Upgrading from the Command Line Interface 78
	Introduction	78
	TFTP 80
	FTP (via a network port)		82
	XModem (via the console cable)			83

Upgrading from the Bootrom Interface 84

Introduction		84
TFTP	86
FTP	86
XModem 87
Bootrom Upgrade		88
Bootrom Upgrade via TFTP			89
Bootrom Upgrade via FTP			89

Bootrom Upgrade via XModem 90

A	SAFETY INFORMATION
	Power Cord Set — Japan 94
	Important Safety Information			94
	L’information de Sécurité Importante				97
	Wichtige Sicherheitsinformationen 101
	Información de Seguridad Importante				104
	Importanti Informazioni di Sicurezza				107
	Wa¿ne informacje o zabezpieczeniach				110
B
	PIN-OUTS
	Null Modem Cable		115
	PC-AT Serial Cable		115
	Modem Cable	116
	Ethernet Port RJ-45 Pin Assignments				116
C
	TECHNICAL SPECIFICATIONS
	Switch 4500 (26 Port)		119
	Switch 4500 (50 Port)		120
	Switch 4500 PWR (26 Port)			121
	Switch 4500 PWR (50 Port)			122
	RPS 123
	Earthing Lead	123
D
	OBTAINING SUPPORT FOR YOUR PRODUCT
	Register Your Product		125
	Purchase Value-Added Services 125
	Troubleshoot Online		126
	Access Software Downloads			126

Telephone Technical Support and Repair 126

Contact Us 127

INDEX

REGULATORY NOTICES

ABOUT THIS GUIDE

This guide provides all the information you need to install and use the following switches in their default state:

■SuperStack® 3 Switch 4500 26-Port (3CR17561-91)

■SuperStack® 3 Switch 4500 50-Port (3CR17562-91)

■SuperStack® 3 Switch 4500 PWR 26-Port (3CR17571-91)

■SuperStack® 3 Switch 4500 PWR 50-Port (3CR17572-91)

All procedures described in this guide apply to all models except where stated.

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).

Before You Start This section contains information about the documents and CD-ROM that accompany your Switch 4500.

Release Notes The Release Notes provide important information about the current software release, including new features, modifications, and known problems. You should read the Release Notes before installing the Switch in your network.

If the information in the Release Notes differ from the information in this guide, follow the instructions in the Release Notes.

8 ABOUT THIS GUIDE

About Your CD-ROM The CD-ROM contains the following:

■Online documentation for the Switch 4500 — refer to Related Documentation on page 9 for details.

■A link to 3Com Network Director software.

■A number of other useful links.

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	Table 1 and Table 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 IP information, enter the following command: display ip interface br

Related Documentation

9

Table 2 Text Conventions (continued)

Convention	Description
The words “enter”	When you see the word “enter” in this guide, you must type
and “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
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.

Related	In addition to this guide, each Switch documentation set includes the
Documentation	following:
	■ SuperStack 3 Switch Configuration 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 Quick Reference Guide
	This guide contains:
	■ a list of the features supported by the Switch.
	■ a summary of the command line interface commands for the
	Switch. This guide is also available under the Help button on the
	web interface.
	■ SuperStack 3 Switch Command 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 PDF format on the CD-ROM that accompanies the Switch.

10 ABOUT THIS GUIDE

	■ Release Notes
	These notes provide information about the current software release,
	including new features, modifications, and known problems. The
	Release Notes are supplied in hard copy with your Switch.
Accessing Online	To access the documentation on the CD-ROM supplied with your Switch,
Documentation	do the following:

1Insert the CD-ROM into your CD-ROM drive. If your PC has auto-run enabled, a splash screen will be displayed automatically.

2Select 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 PDF Command Reference Guide is stored in the Docs directory on the CD-ROM.

■The PDF Configuration Guide is stored in the Docs directory of the CD-ROM.

Documentation	Your suggestions are very important to us. They will help make our
Comments	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:
	Part Number DUA1756-1AAA01
	SuperStack 3 Switch 4500 Family Getting Started Guide
	Page 21

Documentation Comments 11

Please note that we can only respond to comments and questions about 3Com product documentation at this e-mail address. Questions related to technical support or sales should be directed in the first instance to your network supplier.

12 ABOUT THIS GUIDE

1	INTRODUCING THE
	SUPERSTACK 3 SWITCH 4500

FAMILY

This chapter contains introductory information about the Switch 4500 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 4500

■Switch 4500 — Front View Detail

■Switch 4500 — Rear View Detail

■Default Settings

14 CHAPTER 1: INTRODUCING THE SUPERSTACK 3 SWITCH 4500 FAMILY

About the Switch	The Switch 4500 Family are mixed media devices. Table 3 summarizes
4500	what each Switch consists of:
	Table 3 Switch 4500 Family Hardware
	Switch 4500 Family		10BASE-T\100BASE-TX Ports		10BASE-T\100BASE-TX PoE Ports	10BASE-T\100BASE-TX\1000BASE-T Ports	1000BASE-X SFP Ports	1000BASE-T SFP Transceiver	RJ-45 Console Port	-48V DC RPS Input
	Switch 4500 26 Port		24			2*	2*		1
	Switch 4500 50 Port		48				2†	2†	1
	Switch 4500 PWR 26 Port				24		2†	2†	1	1
	Switch 4500 PWR 50 Port				48		2†	2†	1	1

* Combo SFP and 10/100/1000 Ports

† Combo SFP and 1000BASE-T SFP transceiver installed in last two 1000BASE-X SFP slots

The Switch 4500 Family provides high-performance workgroups with a backbone to server connection. You can also add the Switch 4500 Family to any SuperStack® system as your network grows.

For information about using the software features of the Switch, refer to the “Command Reference Guide” on the CD-ROM that accompanies the Switch.

					Switch 4500 — Front View Detail 15
Summary of Table 4 summarizes the hardware features that are supported by the
Hardware Features	Switch 4500.
	Table 4 Hardware Features
	Feature			Switch 4500
	Addresses			Up to 8,000 supported
	Auto-negotiation			Supported on all ports
	Forwarding Modes			Store and Forward
	Duplex Modes			Half and full duplex on all front panel ports
	Auto MDI/MDIX			Supported on all ports. If fiber SFP transceivers are
				used, Auto MDIX is not supported.
	Flow Control			In full duplex operation all ports are supported
	Traffic Prioritization			Supported (using the IEEE Std 802.ID, 1998 Edition):
				Eight traffic queues per port
	Power over Ethernet			Supported on 10/100 ports (3CR17571-91 and
				3CR17572-91 only)
	Ethernet and Fast Ethernet			Auto-negotiating 10BASE-T/100BASE-TX ports
	Ports
	Gigabit Ethernet Ports			Auto-negotiating 10BASE-T/100BASE-TX/
				1000BASE-T ports (3CR17561-91) only
	SFP Ethernet Ports			Supports fiber Gigabit Ethernet short-wave (SX),
				long-wave (LX), long-haul (LH70) and copper (T)
				transceivers in any combination.
	RPS Support			Connects to -48v DC supply (3CR17571-91 and
				3CR17572-91 only)
	Mounting			19-inch rack or stand-alone mounting
Switch 4500 —
Front View Detail	Figure 1 Switch 4500 26-Port — front view
Port Status LEDs					Console Port
					Unit LED
Speed: (100Base-TX) Green = 100Mbps Yellow = 10Mbps (1000Base-X) Green = 1000Mbps Yellow = 10/100Mbps	Duplex: Green = Full Duplex, Yellow = Half Duplex				3CR17561-91 SuperStack 3 Switch 4500 26-Port
		25	26	27/25	28/26
10/100BASE-TX		1000BASE-X		10/100/1000BASE-T
10/100BASE-TX Ports				Dual Personality		Power LED
		Dual Personality		10/100/1000BASE-T Ports

1000Base-X Ports

16 CHAPTER 1: INTRODUCING THE SUPERSTACK 3 SWITCH 4500 FAMILY

Figure 2 Switch 4500 50-Port — front view

	Port Status LEDs	Console Port	Unit LED			PWR LED
Speed:Green = 100Mbps, Yellow = 10Mbps	Duplex:Green = Full Duplex, Yellow = Half Duplex	3CR17562-91 SuperStack 3 Switch 4500 50-Port
			49	50	51/49	52/50
						PWR
						RPS

RPS LED

	Dual Personality
10/100BASE-TX Ports	1000Base-X Ports

(Fitted with 2 1000BASE-T SFP transceivers in last 2 ports)

Figure 3 Switch 4500 26-Port PWR - front view

Port Status LEDs	Console Port	RPS LED
	Unit	LED

Speed: (100Base-TX) Green = 100Mbps Yellow = 10Mbps	Duplex: Green = Full Duplex, Yellow = Half Duplex	Power: Green = Delivering Power, Yellow = Fault, Flashing Green = Over Budget			3CR17571-91 SuperStack 3 Switch 4500 PWR 26-Port
		25	26	27/25	28/26
					Mode	RPS
					Green=Speed
					Yellow=Duplex
					Flashing=PoE	PWR
	10/100BASE-TX

	Dual Personality
10/100BASE-TX Ports	1000Base-X Ports	Mode LED	Power LED
	(Fitted with 2 1000BASE-T
	SFP transceivers in last 2 ports)
Figure 4 Switch 4500 50-Port PWR - front view
	Port Status LEDs	Console Port	Unit LED	PWR LED
				Mode LED

Speed:Green = 100Mbps, Yellow = 10Mbps	Duplex:Green = Full Duplex, Yellow = Half Duplex	Power:Green = Deliverng Power. Yellow=Fault, Flashing Green=Over Budget	3CR17572-91 SuperStack 3 Switch 4500 PWR 50-Port		Mode
					Green=Speed
					Yellow=Duplex
					Flashing=PoE
			49	50	51/49	52/50
						PWR
						RPS

RPS LED

	Dual Personality
10/100BASE-TX Ports	1000Base-X Ports
	(Fitted with 2 1000BASE-T
	SFP transceivers in last 2 ports)

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/ The Switch 4500 has 24 or 48 auto-negotiating 10BASE-T/100BASE-TX 100BASE-TX Ports ports configured as Auto MDIX (cross-over). These ports automatically

Switch 4500 — Front View Detail 17

provide the appropriate connection. 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.

1000BASE-X SFP Ports SFP (Small Form Factor Pluggable) ports support fiber Gigabit Ethernet short-wave (SX), long-wave (LX), long-haul (LH70) and copper (T) SFP 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 default state for these ports is auto-negotiation enabled, where the speed, duplex and flow control modes are negotiated. As the speed and duplex modes are fixed by the media type, only the flow control is negotiated with the link partner. Alternatively, auto-negotiation can be disabled (except 1000BASE-T which auto-negotiation is mandatory) and the flow control setting can be manually configured.

The Switch 4500 26 Port has 2 x 1000BASE-X SFP ports and 2 X 10/100/1000BASE-T ports, which are implemented as two dual personality ports. Only one port in each pair can be enabled at any one time.

The Switch 4500 50 Port and Switch 4500 PWR 26 and 50 Port have 4 x 1000BASE-X SFP ports. The first two SFP ports support all 3Com gigabit SFP modules. The last two SFP ports have 2 x 1000BASE-T SFP transceivers installed to match the dual personality port configuration of the Switch 4500 26 Port. Only one port in each pair can be enabled at any one time.

Console Port The console port allows you to connect a terminal and perform remote or local out-of-band management. As the console port on the Switch is an RJ-45 port, you will need to connect an RJ-45 to DB9 converter cable to a standard null modem cable in order to connect a terminal.

18 CHAPTER 1: INTRODUCING THE SUPERSTACK 3 SWITCH 4500 FAMILY

Unit LED The Unit LED is a seven segment display visible on the front of the Switch. The Unit LED can be used to indicate the unit number in a fabric, POST test ID and software upgrade information. In the unlikely event of a hardware fault occurring, the Unit LED may be used to help diagnose the problem. For information on using the Unit LED for problem solving, see “Solving Problems Indicated by LEDs” on page 70

LEDs Table 5 lists LEDs visible on the front of the Switch, and how to read their status. For information on using the LEDs for problem solving, see “Solving Problems Indicated by LEDs” on page 70.

Table 5 LED Behavior

LED Color	Indicates
Unit LED
Green	Power On Self Test (POST) is in progress. During POST, the
	test ID number appears in the Unit LED (seven segment
	display).
	or
	Software download is in progress. During software
	download, a clockwise cycling bar appears in the Unit LED.
Green flashing	The Switch has failed POST. The Unit LED flashes the
	number of the test that has failed.

Green flashing ‘f’ There has been a fan failure.

Green flashing ‘t’ The Switch is over temperature and unit temperature is critical.

PWR LED
Green	The Switch is powered-up and operating normally.
Green flashing	Self Test (POST) or Software Download is in progress.
Yellow flashing	One or more ports have failed POST.
Red	The Switch has failed its Power On Self Test.
Off	The Switch is not receiving power or there is a fault with the
	Power Supply Unit.

Mode LED (3CR17571-91 and 3CR17572-91 only)

Speed	Green	10/100 Port Speed and Activity, 1000 SFP Status and
		Activity, or Stack Status and Activity.
Duplex Yellow		10/100 Duplex and Activity, 1000 SFP Duplex and Activity,
		or Stack Activity
PoE	Red	10/100 Port showing PoE Information

		Switch 4500 — Front View Detail	19
LED	Color	Indicates
RPS LED (3CR17571-91 and 3CR17572-91 only)
	Green	AC and RPS supply connected.
	Yellow	AC failed or not connected. RPS supply is OK.
	Off	There is no RPS supply connected.
10BASE-T/100-TX Port LEDs
Speed	Green	A high speed (100 Mbps) link is present, blinking off for
		every packet received or transmitted.
	Yellow	A low speed (10 Mbps) link is present, blinking off for every
		packet received or transmitted.
	Yellow Flashing	The port has failed POST.
	Off	No link is present.
Duplex (3CR17571-91 and 3CR17572-91 only)
	Green	Full duplex, blinking off for every packet received or
		transmitted.
	Yellow	Half duplex, blinking off for every packet received or
		transmitted.
	Yellow flashing	The port has failed POST.
	Off	No link is present.
PoE (3CR17571-91 and 3CR171572 only)
	Green	Power is being delivered to the port.
	Green flashing	Port power has exceeded limit or is unable to supply power
		due to unit being over budget.
	Yellow	PoE error, no power supplied on port.
	Yellow flashing	The port has failed post.
	Off	No power is being delivered.
1000BASE-X SFP Port LEDs
Speed	Green	A high speed (1000 Mbps) link is present.
	Yellow Flashing	Port failed POST.
	Off	No link is present.
Duplex (3CR17571-91 and 3CR17572-91 only)
	Green	Full duplex packets are being transmitted/received on the
		port.
	Yellow	Half duplex packets are being transmitted/received on the
		port.
	Yellow flashing	Port failed POST.
	Off	No link is present.

20 CHAPTER 1: INTRODUCING THE SUPERSTACK 3 SWITCH 4500 FAMILY

Switch 4500 — Rear						Figure 5 Switch 4500 — rear view
View Detail
Power Socket									Open Book Warning Labels

~100-240V; 50/60Hz; 1A

Earthing Screw

		Figure 6 Switch 4500 PWR - rear view
Power Socket		Open Book Warning Labels
	NULL
~100-240V; 50/60Hz; 7.0A
-53	-55V;19.5A
Redundant Power System Socket		Earthing Screw

Power Socket The Switch automatically adjusts its power setting to any supply voltage in the range 100-240 VAC.

Open Book Warning Before installing or removing any components from the Switch 4500 or Labels carrying out any maintenance procedures, you must read the safety

information provided in Appendix A of this guide.

AVERTISSEMENT: Avant d'installer ou d'enlever tout composant des commutateurs de la gamme Switch 4500 ou d'entamer une procédure de maintenance, lisez les informations relatives à la sécurité qui se trouvent dans l'annexe A de ce guide.

VORSICHT:Bevor Sie Komponenten der Switch 4500-Baureihe installieren oder deinstallieren und bevor Sie Wartungsarbeiten ausführen, müssen Sie die in Anhang A dieses Handbuchs aufgeführten Sicherheitshinweise lesen.

ADVERTENCIA: Antes de instalar o extraer cualquier componente del Switch 4500 Family o de realizar tareas de mantenimiento, debe leer la información de seguridad facilitada en el Apéndice A de esta guía.

Default Settings 21

AVVERTENZA: Prima di installare o rimuovere qualsiasi componente dello Switch 4500 Family o di eseguire qualsiasi procedura di manutenzione, leggere le informazioni di sicurezza riportate nell'Appendice A di questa guida.

OSTRZEŻENIE: Przed instalacją lub usunięciem jakichkolwiek elementów z przełącznika z rodziny 4500 lub przeprowadzeniem prac konserwacyjnych należy zapoznać się z informacjami o bezpieczeństwie zawartymi w Załączniku A niniejszego podręcznika.

Redundant Power Provides supplemental power for PoE ports (up to 15.4w on all ports) and System Socket redundant power for powered devices and the Switch itself.

Default Settings Table 6 shows the default settings for the Switch 4500 Family:

Table 6 Default Settings

Feature	Switch 4500
Automatic IP Configuration	Enabled
Port Status	Enabled
Port Speed	Auto-negotiated
Duplex Mode	Auto-negotiated
Power over Ethernet	Enabled (3CR17571-91 and 3CR17572-91 only)
Flow Control	Auto-negotiated
Broadcast Storm Control	Enabled
Virtual LANs (VLANs)	All ports belong to the untagged Default VLAN
	(VLAN 1) with IEEE Std 802.1Q-1998 learning
	operational
Management VLAN	Any VLAN for all units.
Link Aggregation Control	Disabled per port
Protocol (LACP)
IP Multicast Filtering	Filtering enabled
Rapid Spanning Tree Protocol	Enabled
Fast Start	Enabled on front panel ports
RMON Alarm	Enabled

22 CHAPTER 1: INTRODUCING THE SUPERSTACK 3 SWITCH 4500 FAMILY

Feature	Switch 4500
Traffic Prioritization	All ports prioritize VoIP traffic (LAN and IP).
	All ports set to “best effort” for all other traffic.
Port Security	Disabled per port
Configuration Save and	Disabled
Restore

2	INSTALLING THE SWITCH

This chapter contains the information you need to install and set up the Switch 4500. It covers the following topics:

■Package Contents

■Choosing a Suitable Site

■Rack-mounting

■Connecting a Redundant Power Supply to your Switch 4500 PWR

■Placing Units On Top of Each Other

■The Power-up Sequence

■SFP Operation

WARNING: Safety Information. Before installing or removing any components from the Switch 4500 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 4500 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 4500 entfernen oder dem Switch 4500 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 Switch 4500 o de realizar tareas de mantenimiento, debe leer la información de seguridad facilitada en el Apéndice A de esta guía del usuario.

24 CHAPTER 2: INSTALLING THE SWITCH

AVVERTENZA: Informazioni di sicurezza. Prima di installare o rimuovere qualsiasi componente dal Switch 4500 o di eseguire qualsiasi procedura di manutenzione, leggere le informazioni di sicurezza riportate nell'Appendice A della presente guida per l'utente.

OSTRZEŻENIE: Informacje o zabezpieczeniach. Przed instalacją lub usunięciem jakichkolwiek elementów z product lub przeprowadzeniem prac konserwacyjnych należy zapoznać się z informacjami o bezpieczeństwie zawartymi w Załączniku A niniejszego podręcznika.

Package Contents	■	Switch unit
	■ Box containing two 3CSFP93-4500 1000Base-T SFPs (not
		3CR17561-91)
	■ CD-ROM (includes documentation related to your Switch)
	■ Getting Started Guide (this guide)
	■	Release Notes
	■	Unit Information Labels
	■	Warranty Information
	■	RPS Flyer
	■	Power Cord
	■ Console Cable (RJ-45)
	■ RPS -48V DC Connector and backshell (3CR17571-91 and
		3CR17572-91 only)
		■ RPS Connector Cable Tie
		■ Earthing Lead
	■ 2 x Front securing brackets
	■	4 x Screws

■ 2 x Back securing brackets and 2 x Screws (3CR17571-91 and 3CR17572-91 only)

■ 4 x Rubber feet

Choosing a Suitable Site

25

Choosing a Suitable The Switch is suited for use on a desktop, either free standing or

Site mounted in a standard 19-inch equipment rack. Alternatively, the Switch can be mounted in a wiring closet or equipment room. 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).

If the Switch is installed in a 19-inch rack or closed assembly its local air temperature may be greater than room ambient temperature.

■The air is as free from dust as possible.

■The unit is installed in a clean, air conditioned environment.

■No more than eight Switch units are placed on top of one another, if the units are free-standing.

■The Switch is situated away from sources of conductive (electrical) dust, for example laser printers.

■The AC supply used by the Switch is separate to that used by units that generate high levels of AC noise, for example air conditioning units and laser printers.

26 CHAPTER 2: INSTALLING THE SWITCH

Rack-mounting		The Switch 4500 is 1U high and will fit in most standard 19-inch racks.
		CAUTION: Disconnect all cables from the Switch before continuing.
		Remove all self adhesive pads from the underside of the Switch if they
		have been fitted.
		To rack-mount your Switch 4500:
	1 Place the Switch the right way up on a hard flat surface, with the front
		facing towards you.
	2 Locate a mounting bracket over the mounting holes on one side of the
		front of the Switch, as shown in Figure 7.
		Figure 7 Fitting a front bracket for rack-mounting

3Insert the two screws and tighten with a suitable screwdriver.

You must use the screws supplied with the mounting brackets. Damage caused to the unit by using incorrect screws invalidates your warranty.

4Repeat steps 2 and 3 for the other side of the Switch.

5Insert the Switch into the 19-inch rack and secure with suitable screws (not provided). Ensure that ventilation holes are not obstructed.

6Connect network cabling.

Rack-mounting 27

Rack Mounting the	To rack mount the back of your Switch 4500 (PWR only):
Back of your Switch
4500 (PWR only)
1	Locate a rear rail bracket over the mounting holes on one side of the rear
	of the Switch, as shown in Figure 8.
	The bracket has two mounting positions depending on the rack depth.
	Table 7 shows the correct positions to mount the bracket:
	Table 7 Rear rail rack mounting points
		Distance from Front to Rear	Mounting Positions
		37cm — 25cm	Middle mounting point
		43cm — 56cm	Rear mounting point
2
	Insert the screw and tighten with a suitable screwdriver.
3	Repeat steps 1 and 2 for the other rear securing bracket.

Figure 8 Fitting a rear rail bracket for rack-mounting

4Insert the Switch into the 19-inch rack and secure with suitable screws (not provided). Ensure that ventilation holes are not obstructed.

5Connect network cabling.

28 CHAPTER 2: INSTALLING THE SWITCH

6 Finally, place a unit information label on the unit in an easily accessible

	position. The unit information label shows the following:
	■ 3Com product name of the Switch
	■ 3Com 3C number of the Switch
	■ Unique MAC address (Ethernet address) of the Switch.
	■ Serial number of the Switch
	You may need this information if you contact 3Com Technical Support.
Connecting a	The Switch 4500 PWR 26-Port and 50-Port have a -48V DC Redundant
Redundant Power	Power Supply socket.
Supply to your
Switch 4500 PWR
	WARNING: The installation of the Redundant Power Supply (RPS) should
	only be carried out by properly trained and qualified personnel.
	WARNING: These instructions must be read in conjunction with the RPS
	flyer and the safety and installation instructions supplied with your RPS.
	WARNING: When powering any Switch 4500 PWR from an RPS, the unit
	must be earthed (grounded). This can be achieved by either connecting
	the power cord to the unit or by connecting the earth terminal on the
	rear of the unit to a reliable electrical earth, or by connecting both. You
	must ensure that the earth connection is made before connecting the DC
	supply from the RPS.
	3Com Switches which support -48V DC RPS inputs, that are PoE enabled,
	can only be powered by an RPS which complies with the isolation
	requirements of IEEE-Std 802.3af. Non PoE enabled switches do not have
	this restriction.
	WARNING: A standard 'positive-earthed' -48V redundant power system
	suitable for use with telecommunications equipment should not be used
	with the 3Com Power-over-Ethernet (PoE) network switches. In order to
	meet the IEEE 802.3af (PoE) specification, the -48V output must be
	isolated from earth (ground) and meet the isolation requirements in that
	specification.

Connecting a Redundant Power Supply to your Switch 4500 PWR 29

WARNING: Any RPS must be approved as a SELV output in accordance with IEC 60950-1/UL 60950-1/EN 60950-1.

WARNING: The characteristics of the Switch 4500 DC supply input are given in Appendix C on page 119.

The Switch 4500 PWR units can be powered in three different ways:

■AC Mains only — does not offer any power redundancy. If the AC mains supply or the AC power supply fail, the Switch will power off.

■AC Mains and -48V DC (primary supply) — the internal AC supply acts as the backup in the event of a DC power failure.

■DC only — the Switch does not need an AC supply and the resiliency is provided by the DC supply. This is useful in an environment where only DC power is available.

The RPS provides three main benefits to the customer:

■Power Redundancy — if a Switch is powered from the mains supply unit, a failure of the internal power supply will cause the Switch to fail. This can be overcome by connecting both the AC and DC RPS supplies to the Switch. Additional redundancy can also be added to the DC power by using (N+1) DC power supplies to further increase the availability of the system.

■Uninterruptible Power — the system allows easy connection and maintenance of batteries to the RPS shelf to further increase the availability of the system.

■Additional Power to PoE Ports — the internal AC Power Supply of a PoE Switch can provide enough power for most network applications. The RPS can be used to supplement additional power (up to a maximum of 15.4W), including full backup of all PoE devices on the network.

Table 8 below, outlines the behavior of the Switch when changes occur to the power system, such as removing the AC mains cable when the RPS is attached. The responses to the different power inputs are controlled by the Switch’s internal power supply and not by the RPS.

30 CHAPTER 2: INSTALLING THE SWITCH

Table 8 Switch Power Inputs

Power Input before	Power Input after	Correct Response
User Intervention	User Intervention
AC mains and RPS	RPS only	The unit remains powered by the RPS.
AC mains and RPS	AC mains only	The unit is powered by the AC mains.
		PoE dropped on all ports, however
		the unit does not reset. PoE restarts
		powered by the remaining power
		from the AC mains. PoE ports will be
		dropped depending on their preset
		priority level.
		The total power available to the
		Switch may be less than when
		powered from the RPS. Some PoE
		ports may be dropped as they are
		unable to obtain the power they
		require.
RPS only	AC mains and RPS	The unit remains powered by the RPS.
AC mains	AC mains and RPS	The unit is powered by the RPS. PoE
		ports can be added.

Specifying the	3Com’s redundant power solution allows the use of any off-the-shelf
Redundant Power	-48V DC RPS that meets the requirements defined in Appendix C on
System	page 119.
	For an approved vendor list, more details about purchasing the 3Com
	recommended RPS and a full set of requirements go to:

http://www.3Com.com/RPS

The 3Com recommended RPS generates -48V DC power using power supply units (or rectifiers). The outputs of the rectifier(s) are connected together so that the total -48V power available can be increased by adding additional rectifiers. For example, three 1500W rectifiers can provide up to 4500W. Hot removal or insertion of a rectifier will not affect the -48V DC output voltage.

Table 9 shows an example of the total power available from a number of 1500W rectifiers.

A minimum of two rectifiers are required for each shelf to provide N+1 rectifier redundancy.