3COM 2250-SFP, 2226-SFP, 2426-PWR User Manual

www.3Com.com

Baseline Switch 2226-SFP Plus Baseline Switch 2426-PWR Plus Baseline Switch 2250-SFP Plus

Installation and User Guide

Installations- und Bedienungsanleitung

3CBLSF26 3CBLSF26PWR 3CBLSF50

Part No. 10016622 Published May 2008

3Com Corporation ■ 350 Campus Drive ■ Marlborough ■ MA 01752-3064

Copyright © 2008, 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.

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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.

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3Com and the 3Com logo are registered trademarks of 3Com Corporation.

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IEEE and 802 are registered trademarks of the Institute of Electrical and Electronics Engineers, Inc.

All other company and product names may be trademarks of the respective companies with which they are associated.

ENVIRONMENTAL STATEMENT

It is the policy of 3Com Corporation to be environmentally friendly in all operations. To uphold our policy, we are committed to:

■ Establishing environmental performance standards that comply with national

legislation and regulations.

■ Conserving energy, materials and natural resources in all operations.

■ Reducing the waste generated by all operations. Ensuring that all waste

conforms to recognized environmental standards. Maximizing the recyclable and reusable content of all products.

■ Ensuring that all products can be recycled, reused and disposed of safely.

■ Ensuring that all products are labelled according to recognized

environmental standards.

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End of Life Statement

3Com processes allow for the recovery, reclamation and safe disposal of all end-of-life electronic components.

Regulated Materials Statement

3Com products do not contain any hazardous or ozone-depleting material.

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CONTENTS

ABOUT THIS GUIDE

Conventions 7 Documentation Comments 8 Product Registration 8

1 INTRODUCING THE BASELINE SWITCH

Overview of the Baseline Switch 9 Features and Capabilities 9

Autosensing of MDI/MDIX Connections 9 Autonegotiating 10/100 Mbps Ports 9 Power-over-Ethernet Capability 10 Gigabit Combo Ports (RJ-45/SFP) 10

Physical Features 10

Front Panel 11 Rear Panel 15

Package Contents 16

2 INSTALLING THE SWITCH

Important Safety Information 17 Positioning the Switch 18 Rack-Mounting or Free-Standing 19

Using the Mounting Kit 19 Montagesatz Anweisungen 20 Placing Units On Top of Each Other 20

Supplying Power to the Switch 20

Checking for Correct Operation 21

Using SFP Tranceivers 22

Approved SFP Transceivers 22 Inserting an SFP Transceiver 22 Removing an SFP Transceiver 23

Performing Spot Checks 23

3 CONNECTING TO THE WEB INTERFACE

Requirements for Accessing the Web Interface 25 Using the Console Command Line Interface (CLI) 25 Logging On to the Web Interface 27 Navigating the Web Interface 28

Menu 28 Buttons 31 Port Status 31

Accessing the Switch using the 3Com Switch Detect

Application 31 Running the 3Com Switch Detect Application 32

4 CONFIGURING THE SWITCH FROM THE WEB INTERFACE

Configuration Overview 35 Device Summary Information 35 Administration Settings 37

Modifying the IP Address Settings 37

Automatic IP Configuration 37 IP Setup 38 Backup Configuration 38 Restore Configuration 39 Firmware Upgrade 39 Reset 40 System Access 40 System Name 43 System Time 43 SNMP 43

Configuring VLANs 44

VLAN 45 Forwarding Tagged/Untagged Frames 49 Sample VLAN Configurations 49 Spanning Tree 51 IGMP Snooping & Query 54 Broadcast Storm 55 QoS VoIP Traffic Settings 56 PoE (3CBLSF26-PWR only) 59

Configuring Port Settings 60

Administration 60 Link Aggregation 63 Statistics 66

Security 66

RADIUS Client 66

802.1X Settings 67

Monitoring 69

Address Table 69 Port Mirroring 70 Cable Diagnostics 72

5 TROUBLESHOOTING

Resetting to Factory Defaults 75 Forgotten Static IP Address 76 Solving LED Issues 76 If the Problem Persists 77

A OBTAINING SUPPORT FOR YOUR PRODUCT

Register Your Product 79 Purchase Value-Added Services 79 Troubleshoot Online 79 Access Software Downloads 79 Telephone Technical Support and Repair 80 Contact Us 80

B TECHNICAL INFORMATION

3CBLSF26 Related Standards 83

Environmental 83 Physical 83 Electrical 83

3CBLSF26PWR Related Standards 84

Environmental 84 Physical 84 Electrical 84

3CBLSF50 Related Standards 85

Environmental 85 Physical 85 Electrical 85

C PIN-OUTS

Console Cable 87 Null Modem Cable 88

PC-AT Serial Cable 88 Modem Cable 88 Ethernet Port RJ-45 Pin Assignments 89

D 3COM CLI REFERENCE GUIDE

Getting Started with the Command Line Interface 91

Console Port 91 Logging on to the CLI 91 Automatic Logout 92 Concurrent CLI Sessions 92

CLI Commands 92

?93 Ping 94 Summary 94 ipSetup 95 Upgrade 96 Initialize 97 Reboot 97 Logout 98 Password 98

REGULATORY NOTICES

GLOSSARY

INDEX

ABOUT THIS GUIDE

This guide describes how to install your 3Com Switch and perform initial management configurations. It covers the following switches:

Baseline Switch 2226-SFP Plus (3CBLSF26) Baseline Switch 2426-PWR Plus (3CBLSF26PWR) Baseline Switch 2250-SFP Plus (3CBLSF50)

Unless noted otherwise, the features, specifications and procedures described hereafter are shared by all the switch models covered in this guide. Device drawings, screen captures and command line interface examples are based on the 3CBLSF26PWR model. Where features vary significantly between the switches, examples are provided for each.

This guide is intended for use by those responsible for installing and setting up network equipment; consequently, it assumes a basic working knowledge of LANs (Local Area Networks).

Diese Anleitung ist für die Benutzung durch Netzwerkadministratoren vorgesehen, die für die Installation und Einstellung von Netzwerkkomponenten verantwortlich sind; Erfahrung bei der Arbeit mit LANs (Local Area Networks) ist vorausgesetzt.

If release notes are shipped with your product and the information there 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:

www.3Com.com

Conventions

Ta bl e 1 and Ta bl e 2 list conventions that are used

throughout this guide.

Ta b l e 1 Notice Icons

Icon Notice Type Description

Information note Information that describes

Caution Information that alerts you to

Warning Information that alerts you to

important features or instructions

potential loss of data or potential damage to an application, system, or device

potential personal injury

8 ABOUT THIS GUIDE

Tabl e 2 Text Conventions

Convention Description

The words “enter” and “type”

Keyboard key names If you must press two or more keys

Words in italics Italics are used to:

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.”

simultaneously, the key names are linked with a plus sign (+). Example:

Press Ctrl+Alt+Del

■ 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.

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:

pddtechpubs_comments@3Com.com

Please include the following information when contacting us:

■ Document title

■ Document part number (on the title page)

■ Page number (if appropriate)

Example:

■ Baseline Switch 2426-PWR Plus User Guide

■ Part number: 10016622

■ Page 25

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.

Product Registration

You can now register your Baseline Switch on the 3Com Web site to receive up-to-date information on your product:

http://esupport.3Com.com

This chapter provides an overview of the features and capabilities of the 3Com Baseline Switch 2226-SFP Plus, 3Com Baseline Switch 2426-PWR Plus, and 3Com Baseline Switch 2250-SFP Plus. It also identifies the contents of the Switch package and helps you get to know the physical features of the device.

INTRODUCING THE BASELINE SWITCH

Overview of the Baseline Switch

The 3Com® Baseline Switch 2226-SFP Plus is a versatile, easy-to-use configurable switch.

The 3Com versatile, easy-to-use configurable Power-over-Ethernet (PoE) Switch.

The 3Com easy-to-use configurable switch.

Each Switch is ideal for users who want the high-speed performance of 10/100 switching with the added functionality of Gigabit copper and fiber links, but do not need sophisticated management capabilities. The Switch is shipped ready for use. No configuration is necessary.

Baseline Switch 2426-PWR Plus is a

Baseline Switch 2250-SFP Plus is a versatile,

Features and Capabilities

The Switch has 24 or 48 shielded RJ-45, 10/100 Mbps auto-negotiating ports and 2 Gigabit combo ports (comprised of a RJ-45 port and a Small Form Factor Pluggable (SFP) transceiver slot) on the front panel for easy, flexible connection to fiber-based Gigabit media. A console port is also provided on the front panel to enable out-of-band configuration.

Autosensing of MDI/MDIX Connections

All ports on the Switch can autosense both medium dependent interface (MDI) and medium dependent interface crossover (MDIX) connections. This allows you to connect network devices to each port using either a normal straight-through TP (twisted pair) cable or a ‘crossover’ TP cable.

Any port can therefore be used to connect to another switch port, server, or workstation without additional configuration.

Autonegotiating 10/100 Mbps Ports

Each 10/100 Mbps port automatically determines the speed and duplex mode of the connected equipment and provides a suitable switched connection. The

10 INTRODUCING THE BASELINE SWITCH

10/100 Mbps ports can operate in either half-duplex or full-duplex mode.

Power-over-Ethernet Capability

The Switch 2426-PWR Plus (3CBLSF26PWR) provides 24 front panel RJ-45 ports that support the IEEE 802.3af Power-over-Ethernet (PoE) standard. Any 802.3af compliant device attached to a port can directly draw power from the Switch over the Ethernet cable without requiring its own separate power source. This capability gives network administrators centralized power control for devices such as IP phones and wireless access points, which translates into greater network availability.

The Switch also supports a pre-standard implementation of 802.3at, delivering up to 29.6 W per port (measured at the PD, assuming 100 m Cat 5E cable connected between the PD and the Switch 2426-PWR), subject to the maximum power budget available.

Gigabit Combo Ports (RJ-45/SFP)

The 2 Gigabit combo ports support fiber Gigabit Ethernet short-wave (SX) and long-wave (LX) SFP transceivers in any combination. This offers the flexibility of using SFP transceivers to provide connectivity between the Switch and a 1000 Mbps core network.

Physical Features

Figures 1, 2, and 3 show the front and rear panels of the Switch. The numbers in these diagrams refer to numbered sections in “Front Panel” on page 11 and

“Rear Panel”

Figure 1 3CBLSF26 Front and Rear Panels

Figure 2 3CBLSF26PWR Front and Rear Panels

on page 15.

When an SFP port is in operation, the corresponding 1000BASE-T port is disabled. The 1000 Mbps connections can only operate in full duplex mode.

Physical Features 11

Figure 3 3CBLSF50 Front and Rear Panels

Front Panel

The front panel of the Switch contains a series of indicator lights (LEDs) that help describe the state of various networking and connection operations.

(1) RJ-45 10/100 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.

AVERTISSEMENT: Points d’accès RJ-45. Ceux-ci sont protégés par des prises de données. Ils ne peuvent pas être utilisés comme prises de téléphone conventionnelles standard, ni pour la connection de l’unité à un réseau

téléphonique central privé ou public. Raccorder seulement connecteurs de données RJ-45, systèmes de réseaux de téléphonie ou téléphones de réseaux à ces prises. Il est possible de raccorder des câbles protégés ou non protégés avec des jacks protégés ou non protégés à ces prises de données.

WARNHINWEIS: RJ-45-Porte. Diese Porte sind geschützte Datensteckdosen. Sie dürfen weder wie normale traditionelle Telefonsteckdosen noch für die Verbindung der Einheit mit einem traditionellem privatem oder öffentlichem Telefonnetzwerk gebraucht werden. Nur RJ-45-Datenanscluße, Telefonnetzsysteme or Netztelefone an diese Steckdosen anschließen. Entweder geschützte oder ungeschützte Buchsen dürfen an diese Datensteckdosen angeschlossen werden.

The Switch has 24 or 48 10/100 Mbps auto-negotiating ports. Each port supports automatic MDI/MDI-X detection and can be connected to either a 10BASE-T, or 100BASE-TX device.

For each port, the speed and duplex mode (half duplex or full duplex for 10BASE-T and 100BASE-TX) are automatically determined by the capabilities of the connected device.

The 3CBLSF26PWR Switch also supports IEEE

802.3af-2003 standard (802.3af) and pre-standard P802.3at DTE Power via MDI Enhancements (PoE+). Each port can detect connected 802.3af/at-compliant

12 INTRODUCING THE BASELINE SWITCH

network devices, such as IP phones or wireless access points, and automatically supply the required DC power, up to a maximum of 29.6 W measured at the PD, assuming 100 m Cat 5E cable connected between the PD and the Switch 2426-PWR, subject to power being available from the overall power budget.

(2) Gigabit Combo Ports (RJ-45/SFP)

The Gigabit combo ports (RJ-45/Small Form Factor Pluggable (SFP) ports) are numbered 25 and 26 on 3CBLSF26 and 3CBLSF26PWR, 49 and 50 on 3CBLSF50. If the link connection on the SFP port is active, the associated RJ-45 port of the same number is disabled.

The two SFP ports support fiber Gigabit Ethernet short-wave (SX – 3CSFP91) and long-wave (LX – 3CSFP92) 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 active port is the SFP port. The selection of active ports can be configured via the Web interface.

The SFP port supports full duplex mode only.

SFP ports are numbered 25 and 26 on 3CBLSF26 and 3CBLSF26PWR, 49 and 50 on 3CBLSF50. When an SFP

port is active it has priority over the 10/100/1000 port of the same number. The corresponding 10/100/1000 port is disabled when an SFP link connection is active.

(3) Console Port

The console port allows out-of-band access to the Switch’s built-in Command Line Interface (CLI) that you can use to reset the Switch to factory defaults, change the IP address that is assigned to the Switch, set the admin password, reboot the Switch, or upgrade the Switch firmware via TFTP.

To connect to the Console Port, you need the following:

■ The console cable provided in the Switch package,

connected to the console port of the Switch, and to an available serial (com) port on your computer

■ A terminal emulation application capable of VT100

emulation, installed on your computer

■ Configure the com port connection parameters in

your terminal emulator as follows:

■ Com port: Choose based on the computer serial

port to which the console cable is attached (often COM1)

■ Speed (baud): 38400

■ Data bits: 8

■ Stop bits: 1

■ Parity: None

■ Flow Control: None

Physical Features 13

(4) 10/100BASE-TX Link/Activity Status LEDs

The top row (3CBLSF50) and the first (top) and third rows (3CBLSF26/3CBLSF26PWR) of LEDs, which are colored yellow or green, show the link, activity and speed status of the related ports:

Tabl e 1 10/100BASE-TX Link/Activity Status LEDs

Status Meaning

Green The link is operating at 100 Mbps.

Yellow The link is operating at 10 Mbps.

Flashing Green

Flashing Yellow

Off The link has not been established, nothing is

Packets are being received or transmitted on the port at 100 Mbps.

Packets are being received or transmitted on the port at 10 Mbps.

connected to the port, or there is a problem:

■ Check that the attached device is powered

on.

■ Check that the cable is the correct type, is

not faulty, and is inserted correctly.

If these checks do not identify the cause of the problem, it may be that the unit or the device connected to the port is faulty. Contact your supplier for further advice.

(5) 10/100BASE-TX Duplex Status LEDs (3CBLSF26 and 3CBLSF26PWR Only)

The second and fourth row of LEDs, which are colored yellow, show the duplex status of the related ports:

Tabl e 2 10/100BASE-TX Duplex Status LEDs

Status Meaning

Yellow The link is operating in full duplex mode.

Off The link is operating in half duplex mode.

■ The duplex status of the ports on 3CBLSF50

(and 3CBLSF26/3CBLSF26PWR) can also be monitored from the user interface.

(6) Gigabit Combo Port and Duplex Status LEDs

Each Gigabit combo port has two status LEDs which indicate functions dependant upon whether a connection has been made to the fixed 1000BASE-T port, or if an SFP Module has been inserted.

14 INTRODUCING THE BASELINE SWITCH

1000BASE-T Mode

Tabl e 3 1000BASE-T Link/Activity Status LEDs

Link/Activity Meaning

Green The link is operating at 1000 Mbps.

Yel lo w The link is operating at 10 or 100 Mbps.

Flashing Green Packets are being received or

Flashing Yellow Packets are being received or

transmitted on the port at 1000 Mbps.

transmitted on the port at 10 or 100 Mbps.

Off The link has not been established,

nothing is connected to the port, or there is a problem:

■ Check that the attached device is

powered on.

■ Check that the cable is the correct

type, is not faulty, and is inserted correctly.

If these checks do not identify the cause of the problem, it may be that the unit or the device connected to the port is faulty. Contact your supplier for further advice.

Tabl e 4 1000BASE-T SFP/Duplex Status LEDs

SFP/Duplex Meaning

Yel lo w The link is operating at full duplex.

Off The link is operating at half duplex, or

no link is established.

1000BASE-T only operates in full-duplex mode. 10/100BASE-TX can operate in half- or full-duplex mode.

SFP Mode

Tabl e 5 SFP Link/Activity Status LEDs

Link/Activity Meaning

Green The link is operating at 1000 Mbps.

Flashing Green Packets are being received or

Off The link has not been established; Either

transmitted on the port at 1000 Mbps.

nothing is connected to the port, or there is a problem:

■ Check that the attached device is

powered on.

■ Check that the SFP module is inserted

correctly.

■ Check that the fiber cable is the

correct type, is not faulty, and is inserted correctly.

■ Ensure that the transmit (TX) and

receive (RX) fiber cables are not swapped. TX on the remote device must be connected to RX on the local device; likewise, RX on the remote device must be connected to TX on the local device.

If these checks do not identify the cause of the problem, it may be that the unit or the device connected to the port is faulty. Contact your supplier for further advice.

Physical Features 15

Tabl e 6 SFP Mode SFP/Duplex Status LEDs

SFP/Duplex Meaning

Green The SFP module is inserted, regardless of

Off The SFP module is not inserted.

the link status.

The SFP module will only disable the 1000BASE-T interface once there is a valid link on the module.

(7) Power LED

The Power LED shows the power status of the Switch.

Tabl e 7 Power Status LED

Status Meaning

Green The unit is powered on and ready for use.

Yellow Internal power, POST, or loopback test has

Flashing The Switch is undergoing the power up

Off The unit is not receiving power.

failed. Switch is in fail-safe mode.

sequence, or a software upgrade is underway.

■ Check that the power cord is connected

correctly.

■ If the unit still does not operate, contact your

supplier.

Do not apply the pads if you intend to rack mount the unit.

If the unit is to be part of a free-standing stack, apply the pads to each marked corner area on the underside of the unit. Place the unit on top of the lower unit, ensuring that the pads locate within the recesses of the lower unit.

Rear Panel

The rear panel of the Switch contains the power supply socket.

(9) Power Socket

The Switch automatically adjusts to the supply voltage. Only use the power cord that is supplied with the unit.

(8) Self-adhesive Pads

The unit is supplied with four self-adhesive rubber pads.

16 INTRODUCING THE BASELINE SWITCH

Package Contents

Before installing and using the Switch, verify that your Switch package is complete. The Switch comes with:

■ One power cord

■ One console cable

■ Four standard height, self-adhesive rubber pads

■ One mounting kit (part number 123193-104)

■ Installation CD

■ This User Guide

■ Warranty flyer

The Switch is powered from the AC supply.

If any of the above items are damaged or missing, contact your 3Com network supplier immediately.

INSTALLING THE SWITCH

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

■ Important Safety Information

■ Positioning the Switch

■ Rack-Mounting or Free-Standing

■ Supplying Power to the Switch

■ Using SFP Tranceivers

■ Performing Spot Checks

Important Safety Information

Please refer to the safety information found in the 3Com Switch Family Safety and Regulatory Information manual included with this product. You can find the 3Com Switch Family Safety and Regulatory Information manual on the product CD-ROM that was included with your switch. You can also download the safety manual from the 3Com Web site: www.3Com.com

Informações Importantes de Segurança

Por favor, antes de manusear o produto, leia cuidadosamente as instruções de segurança encontradas no Manual 3Com Switch Family Safety and Regulatory

Information (Translation for this would be: Informações de Segurança e Regulatórias da Famila de Switches 3Com) incluido no produto. Este manual pode ser encontrado no CD-ROM incluido com o seu switch ou no site da 3Com: www.3Com.com

Viktig säkerhets information

Vänligen hänför till säkerhets informationen som är inkluderad med denna produkt i 3Com Switch Family Safety and Regulatory Information manualen. Du kan hitta denna manual på den CD-ROM som följde med din switch. Du kan även ladda ner denna från 3Com hemsidan: www.3Com.com

Importantes informations de securité

Veuillez consulter les informations de securité qui se trouvent dans le manuel suivant 3Com Switch Family Safety and Regulatory Information celui-ci est inclu avec le produit. Vous pouvez trouver ce manuel sur le CD-ROM qui a été livré avec votre switch. Vous pouvez aussi le télécharger sur le site Web de 3Com à:

www.3Com.com

Wichtige Sicherheits Informationen

Bitte wenden Sie sich an die Sicherheitsinformationen in der 3Com Switch Family Safety and Regulatory Information Anleitung die mit diesem Produkt

18 INSTALLING THE SWITCH

vorhanden ist. Sie können diese Sicherheitsanleitung auf der CD-ROM finden die im Lieferumfang Ihres Netzwerkschalters enthalten ist. Sie können die Anleitungsdatei auch von der 3Com Webseite:

www.3Com.com herunterladen.

Importante Avviso di Sicurezza

Vi preghiamo di leggere attentamente e seguire le istruzioni indicate nel manuale di sicurezza "3Com Switch Family Safety and Regulatory Information", che troverete incluso a questo prodotto. Puó trovare il suddetto manuale nel CD-ROM allegato al Vostro Switch. Potete anche scaricarlo dal nostro sito:

www.3Com.com

Information importante de seguridad

Le rogamos lea y siga atentamente las instrucciones indicadas en el manual de seguridad del 3Com Switch Family Safety and Regulatory Information, incluido en este producto. Puede encontrar el manual en el CD-ROM adjunto a su switch.Alternativamente lo puede bajar de la web de 3Com: www.3Com.com

Istotne informacje dot. bezpieczeństwa

Informacje dotyczące bezpieczeństwa są umieszczone w Instrukcji obsługi 3Com Switch Family, która jest do łączona do tego produktu. Wraz z prze łącznikiem znajduje sie instrukcja na płycie CD-ROM. Istnieje także możliwość pobrania instrukcji bezpośrednio ze strony internetowej www.3Com.com

Positioning the Switch

The Switch is suitable for use in an office environment where it can be free-standing or mounted in a standard 19-inch equipment rack.

Alternatively, the Switch can be rack-mounted in a wiring closet or equipment room. A mounting kit, containing two mounting brackets and four screws, is supplied with the Switch.

When deciding where to position the Switch, ensure that:

■ It is accessible and cables can be connected easily.

■ Cabling is away from sources of electrical noise.

These include lift shafts, microwave ovens, and air conditioning units. Electromagnetic fields can interfere with the signals on copper cabling and introduce errors, therefore slowing down your network.

■ Water or moisture cannot enter the case of the unit.

■ Air flow around the unit and through the vents on

the side of the case is not restricted (3Com recommends that you provide a minimum of 25 mm (1 in.) clearance).

■ The air is as free from dust as possible.

■ Temperature operating limits are not likely to be

exceeded. It is recommended that the unit is installed in a clean, air conditioned environment.

Rack-Mounting or Free-Standing 19

It is always good practice to wear an anti-static wrist strap when installing network equipment, connected to a ground point. If one is not available, try to keep in contact with a grounded rack and avoid touching the unit's ports and connectors, if possible. Static discharge can cause reliability problems in your equipment.

Rack-Mounting or Free-Standing

The unit can be mounted in a 19-inch equipment rack using the mounting kit, or it can be free standing. Do not place objects on top of the unit or stack.

CAUTION: If installing the Switch in a free-standing stack of different size Baseline or Superstack 3 units, the smaller units must be installed above the larger ones. Do not have a free-standing stack of more than six units.

Using the Mounting Kit

The Switch is supplied with two mounting brackets and four screws. These are used for rack mounting the unit. When mounting the unit, you should take note of the guidelines given in “Positioning the Switch”

The Switch is 1U (1.7 inches) high and will fit in a standard 19-inch rack.

CAUTION: Disconnect all cables from the unit before continuing. Remove the self-adhesive pads from the underside of the unit, if already fitted.

To rack-mount the Switch:

1 Place the unit 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 unit.

3 Insert the two screws supplied in the mounting kit and

fully tighten with a suitable screwdriver.

Figure 4 Rack Mounting the Unit

on page 18.

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

5 Insert the unit into the 19-inch rack and secure with

suitable screws (not provided).

6 Reconnect the cables.

20 INSTALLING THE SWITCH

Montagesatz Anweisungen

Der Switch wird mit zwei Halterungen und vier Schrauben geliefert. Diese werden für den Einbau in einem Baugruppenträger benutzt. Bei der Montage der Baugruppe beachten Sie die Anweisungen aus

“Positioning the Switch” auf page 18.

Der Switch ist eine Baueinheit hoch und passt in einen Standard 19'' (Zoll) Baugruppenträger.

ACHTUNG: Entfernen Sie alle Kabel, bevor Sie fortsetzen. Entfernen Sie die selbstklebenden Polster (Füße) von der Unterseite der Baugruppe, falls diese bereits angebracht sind.

1 Platzieren Sie die Baugruppe aufrecht auf einer harten,

ebenen Fläche mit der Vorderseite Ihnen entgegen.

2 Ordnen Sie eine der Halterungen über den Löchern an

der Seite der Baugruppe an.

3 Stecken Sie zwei der mitgelieferten Schrauben in die

Löcher und drehen Sie diese mit einem geeigneten Schraubendreher fest.

4 Wiederholen Sie die letzten zwei Schritte auf der

anderen Seite der Baugruppe.

5 Führen Sie die Baugruppe in den 19" (Zoll)

Baugruppenträger ein und sichern Sie die Baugruppe mit geeigneten Schrauben. (Nicht im Lieferumfang enthalten).

6 Schließen Sie alle Kabel wieder an.

Placing Units On Top of Each Other

If the Switch units are free-standing, up to six units can be placed one on top of the other. If you are mixing a variety of Baseline and SuperStack units, the smaller units must be positioned at the top.

If you are placing Switch units one on top of the other, you must use the self-adhesive rubber pads supplied. Apply the pads to the underside of each Switch, sticking one in the marked area at each corner.

Place the Switch units on top of each other, ensuring that the pads of the upper unit line up with the recesses of the lower unit.

Supplying Power to the Switch

Power problems can be the cause of serious failures and downtime in your network. Ensure that the power input to your system is clean and free from sags and surges to avoid unforeseen network outages. 3Com recommends that you install power conditioning, especially in areas prone to blackout, power dips and electrical storms.

The unit is intended to be grounded. Ensure it is connected to earth ground during normal use. Installing proper grounding helps to avoid damage from lightning and power surges.

Before powering on the Switch, verify that the network cables and the power cable are securely connected.

Supplying Power to the Switch 21

CAUTION: The Switch has no ON/OFF switch. The only way to power on and power off the Switch is by connecting and disconnecting the power cord. This is called “power cycling”.

To power on the Switch:

1 Plug the power cord into the power socket on the rear

panel of the Switch. Refer to “(9) Power Socket”

for more information.

page 15

2 Plug the other end of the power cord into a power

outlet.

When the Switch is powered on, the Power LED lights up. If the Power LED does not light up, refer to “(7)

Power LED” on page 15 for more information.

Checking for Correct Operation

After you power on the Switch, it automatically performs a power-on self-test (POST). During POST, the Power LED on the front panel of the Switch flashes green.

When POST is complete, the Power LED turns green. If the Power LED turns yellow after POST, it means that POST failed and the Switch has entered fail-safe mode.

The following summarizes the possible colors for the Power LED after POST.

Tabl e 8 Power LED POST Indications

Status Meaning

Green The unit is powered on and ready to use.

Yellow Power-on self-test or loopback test failed. The

Off The unit is not receiving power:

Switch is in fail-safe mode. This can happen if a port or ports fail when the Switch was powered on.

■ Verify that the power cord is connected cor-

rectly, and then try powering on the Switch again

■ If the Switch still does not operate, contact

your 3Com network supplier

If POST fails, try the following:

■ Power off the Switch, and then power it on again.

Check the Power LED and see if POST was successfully completed.

■ Reset the Switch. See “Resetting to Factory Defaults”

on page 75.

CAUTION: Resetting the Switch to its factory defaults erases all your settings. You will need to reconfigure the Switch after you reset it.

If these do not resolve the issue:

■ Check the 3Com Knowledgebase for a solution. To

visit the 3Com Knowledgebase Web site, start your Web browser, and then enter

http://knowledgebase.3Com.com.

■ Contact your 3Com network supplier for assistance.

22 INSTALLING THE SWITCH

Using SFP Tranceivers

The following sections describe how to insert an SFP transceiver into an SFP slot.

SFP transceivers are hot-insertable and hot-swappable. You can remove them from and insert them into any SFP port without having to power down the Switch.

Approved SFP Transceivers

The following list of approved SFP transceivers is correct at the time of publication:

■ 3CSFP91 SFP (SX)

■ 3CSFP92 SFP (LX)

To access the latest list of approved SFP transceivers for the Switch on the 3Com Web site, enter this URL into your Internet browser:

http://www.3Com.com

3Com recommends using 3Com SFPs in the Switch. If you insert an SFP transceiver that is not supported, the Switch will not recognize it.

■ 1000BASE-SX SFP transceiver

Use this transceiver to connect the Switch directly to a multimode fiber-optic cable.

■ 1000BASE-LX SFP transceiver

Use this transceiver to connect the Switch directly to a single mode fiber-optic cable or to multimode fiber using a conditioned launch cable.

If the SFP transceiver is faulty, it will not operate within the Switch. See “Troubleshooting” on page 75

To activate the SFP port:

1 Hold the transceiver so that the fiber connector is

toward you and the product label is visible, as shown in

Figure 5. Ensure the wire release lever is closed (in the

upright position).

Inserting an SFP Transceiver

To be recognized as valid, the SFP transceiver must have the following characteristics:

■ 1000BASE-SX or 1000BASE-LX media type:

Performing Spot Checks 23

Figure 5 Inserting an SFP Transceiver

2 Gently slide the transceiver into the SFP slot until it

clicks into place.

CAUTION: SFP transceivers are keyed and can be properly inserted only one way. If the transceiver does not click when you insert it, remove it, turn it over, and reinsert it.

3 Remove the plastic protective cover, if fitted.

4 Connect the fiber cable.

5 Attach a male duplex LC connector on the network

cable into the duplex LC connector on the transceiver.

6 Connect the other end of the cable to a device fitted

with an appropriate Gigabit Ethernet connection.

7 Check the Module Active LEDs on the front of the

Switch to ensure that the SFP transceiver is operating correctly.

Removing an SFP Transceiver

Removing an SFP transceiver does not require powering off the Switch.

To remove an SFP transceiver:

1 Disconnect the cable from the transceiver.

2 Move the wire release lever downwards until it is

pointing toward you.

3 Pull the wire release lever toward you to release the

catch mechanism.

The SFP transceiver should slide out easily.

Performing Spot Checks

At frequent intervals, you should visually check the Switch. Regular checks can give you an early warning of a possible failure; any problems can then be attended to when there will be least effect on users.

3Com recommends periodically checking the items listed in Ta b l e 9 .

24 INSTALLING THE SWITCH

Tabl e 9 Items to Check

Cabling Check that all external cabling connec-

Cooling fan (3CBLSF26PWR only)

tions are secure and that no cables are pulled taut.

Where possible, check that the cooling fan is operating by listening to the unit. The fan is fitted near to the front right hand side of the unit (when viewed from the front).

If you experience any problems operating the Switch, refer to “Troubleshooting”

on page 75.

CONNECTING TO THE WEB INTERFACE

The Switch has a built-in Web interface that you can use to set the admin password, change the IP address that is assigned to the Switch, and configure its advanced settings.

If you only want the Switch to function as a basic layer 2 switch, you do not need to access the Web interface and configure the Switch.

This chapter provides information on how to gain access to the Web interface using the Discovery application. It also introduces the menu items and buttons that are available on the Web interface.

The following topics are covered:

■ Requirements for Accessing the Web Interface

■ Using the Console Command Line Interface (CLI)

■ Logging On to the Web Interface

■ Navigating the Web Interface

■ Accessing the Switch using the 3Com Switch Detect

Application

The Switch support the following browsers:

■ Microsoft Internet Explorer (V6.0 and subsequent

releases)

■ Mozilla Firefox (V2.0 and subsequent releases)

■ Netscape (V7.0 and subsequent releases)

Requirements for Accessing the Web Interface

To connect to the Web interface, you need one or more of the following:

■ The console cable that was supplied with your

Switch.

■ The 3Com Switch Detect application, that is

included on the CD-ROM that was supplied with your Switch.

■ A computer that is connected to the Switch and that

has a Web browser.

Using the Console Command Line Interface (CLI)

In order to connect to the Web interface of the Switch, it is necessary to know its IP address. The IP addressing mode of the Switch is covered in Section 4 (Administration/IP Setup on page 37

). In summary, the

26 CHAPTER 3: CONNECTING TO THE WEB INTERFACE

switch will try to obtain an IP address from a DHCP server (assuming the Switch is connected into a network where one is available). If there is no DHCP server available, or you are configuring the Switch in a stand-alone mode, the Switch will allocate itself an “Auto IP” address of 169.254.xx.yy. These last two numbers are taken from the last two numbers of the MAC address. This default IP address can be seen on the label attached to the top cover of your Switch.

In order to see the IP address that has been allocated to the Switch by a DHCP server, or to manually assign one, it is necessary to use the console interface. The CLI Command Reference Guide is covered in Appendix D

Connect the supplied console cable to the console socket, located on the front panel of the Switch. This should be connected to a COM port on your PC (or MAC). Configure a suitable terminal emulator application for 38,400 baud, 8 data bits, no parity and 1 stop bit. Flow control should be disabled.

When the Switch has completed its power up sequence and is ready to operate, pressing the carridge return on your keyboard will result in a prompt on the console interface. Enter the username admin with no password. You will now be presented with a short menu of commands.

Enter summary to display the basic settings for the Switch. Included in this information is:

■ The IP address,

■ Subnet mask and

■ Default gateway

The Switch will take up to two minutes to try to obtain an IP address. During this time the above addresses will be displayed as 0.0.0.0. Only after this period if the Switch has not been able to obtain an IP address, will you see information similar to that shown in Figure 6

Figure 6 CLI Summary with Default IP Address

If the Switch has obtained a DHCP lease, the IP address will be shown. Make a note of it for use when you are ready to use your Web browser to connect to the Switch.

If the 169.254.xx.yy address is not suitable, you can change to a manually assigned IP address by entering ipsetup manual and then entering the required values after the prompts. Enter 1 in the VLAN ID. Enter

Logging On to the Web Interface 27

summary to display the new IP settings. Figure 7 shows

what you should expect to see.

Note that when a manual IP address has been assigned it will not revert back to the DHCP mode on subsequent re-boots.

You will now know either the DHCP or manual IP address and you can now move on to using the Web interface.

Figure 7 CLI Summary with Assigned IP Address

Logging On to the Web Interface

Using the IP address you have obtained in the previous section, enter this into the URL field of your preferred Web browser. There is no need to add http:// before the

IP address. After the Web interface loads in your Web browser, the first page that appears is the logon screen. On this screen, you need to enter the administration user name and password to gain access to the Web interface.

The browser’s address bar also displays the IP address that the Switch is currently using.

Figure 8 Logon Dialog Box

To log on to the Web interface:

1 In User name, type admin.

2 Leave the Password field blank.

3 Click OK.

28 CHAPTER 3: CONNECTING TO THE WEB INTERFACE

Navigating the Web Interface

The Web interface has been designed to enable you to easily perform advanced configuration tasks and view information about the Switch.

3COM 2250-SFP, 2226-SFP, 2426-PWR User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

ABOUT THIS GUIDE

Conventions

Documentation Comments

Product Registration

INTRODUCING THE BASELINE SWITCH

Overview of the Baseline Switch

Features and Capabilities

Autosensing of MDI/MDIX Connections

Autonegotiating 10/100 Mbps Ports

Power-over-Ethernet Capability

Gigabit Combo Ports (RJ-45/SFP)

Physical Features

Front Panel

Rear Panel

Package Contents

INSTALLING THE SWITCH

Important Safety Information

Positioning the Switch

Rack-Mounting or Free-Standing

Using the Mounting Kit

Montagesatz Anweisungen

Placing Units On Top of Each Other

Supplying Power to the Switch

Checking for Correct Operation

Using SFP Tranceivers

Approved SFP Transceivers

Inserting an SFP Transceiver

Removing an SFP Transceiver

Performing Spot Checks

CONNECTING TO THE WEB INTERFACE

Requirements for Accessing the Web Interface

Using the Console Command Line Interface (CLI)

Logging On to the Web Interface

Navigating the Web Interface

Menu