3com 3C16475BS User Manual

Baseline Switch 2226 Plus (3C16475BS) User Guide

http://www.3com.com/

Part No. DUA16475B-SAAA01 Published March 2005

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CONTENTS

ABOUT THIS GUIDE

Conventions 5 Related Documentation 6 Documentation Comments 6

1 INTRODUCING THE BASELINE SWITCH

Overview of the Baseline Switch 2226 Plus 7 Features and Capabilities 7

Autosensing of MDI/MDIX Connections 7 Autonegotiating 10/100 Mbps Ports 7 SFP Ports 8 Traffic Prioritization 8

Physical Features 9

Front Panel 9 Rear Panel 12

Package Contents 12

2 INSTALLING THE SWITCH

Before You Begin 13 Positioning the Switch 13 Aufstellen des Switch 14 Rack-Mounting or Free-Standing 14

Using the Mounting Kit 15 Montagesatz Anweisungen 15 Placing Units On Top of Each Other 16

Supplying Power to the Switch 16

Checking for Correct Operation 17 Connecting a Network Device 17 Using SFP Transceivers 18

Approved SFP Transceivers 18

Inserting an SFP Transceiver 18

Removing an SFP Transceiver 19 Performing Spot Checks 19

3 CONNECTING TO THE WEB INTERFACE

Requirements for Accessing the Web Interface 21 Running the Discovery Application 21 Logging On to the Web Interface 22 Navigating the Web Interface 23

Menu 23

Buttons 24 Accessing the Interface Without Using Discovery 24

DHCP Assigned IP Address 24

Manually Assigned (Static) IP Address 25

4 CONFIGURING THE SWITCH

Configuration Overview 27 Viewing Status Information 27 Changing the Admin Password 28 Modifying the IP Address Settings 29

Automatic IP Configuration 29

Setting the IP Address 30 Configuring Port Settings 31

Viewing Port Settings 31 Default Port Settings 31 Changing a Port’s Settings 32

Configuring VLANs 33

Creating a VLAN 34 Sample VLAN Configurations 35 Removing a VLAN 36

Configuring Link Aggregation 36

Trunk Membership 37 Adding Ports to a Trunk 37

Configuring Trunk Settings 38 Viewing Statistics 38 Monitoring Traffic 39 Setting the Traffic Priority 40

IP Phone Prioritization 40

List of Detected Phones 41 Upgrading the Firmware 41

Downloading Firmware Updates 41

Installing the Firmware on the Switch 42

5 TROUBLESHOOTING

Resetting to Factory Defaults 43 Forgotten Password 44 Forgotten Static IP Address 44 Solving LED Issues 44 Solving Corrupted Firmware 45 If the Problem Persists 45

Access Software Downloads 47 Telephone Technical Support and Repair 48 Contact Us 48

B SAFETY INFORMATION

Important Safety Information 51 Consignes Importantes de Sécurité 52 Wichtige Sicherheitshinweise Informationen 53 Información de Seguridad Importante 54 Importanti Informazioni di Sicurezza 56

C TECHNICAL INFORMATION

Related Standards 59

Environmental 59 Physical 59 Electrical 59

GLOSSARY

INDEX

REGULATORY NOTICES

A OBTAINING SUPPORT FOR YOUR PRODUCT

ABOUT THIS GUIDE

This 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).

Diese Anleitung ist für die Benutzung durch Netzwerkadministratoren vorgesehen, die für die Installation und das einstellen von Netzwerkkompo nenten verantwortlich sind; sie setzt Erfahrung bei.

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) on the 3Com World Wide Web site:

http://www.3com.com

Conventions

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

throughout this guide.

Ta bl e 1 Notice Icons

Icon Notice Type Description

Information note

Caution Information that alerts you to potential loss of

Warning Information that alerts you to potential

Ta bl e 2 Text Conventions

Convention Description

Screen displays

The words “enter”

“type”

and

Words in italics Italics are used to:

Information that describes important features or instructions

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

personal injury

This typeface represents information as it appears on the screen.

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.”

■ 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.

6 ABOUT THIS GUIDE

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)

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.

Example:

■ 3Com Baseline Switch 2226 Plus User Guide

■ Part number: DUA16475B-SAAA01

■ Page 25

INTRODUCING THE BASELINE SWITCH

This chapter provides an overview of the features and capabilities of the 3Com It also identifies the contents of the Switch package and helps you get to know the physical features of the device.

Baseline Switch 2226 Plus.

Overview of the Baseline Switch 2226 Plus

The 3Com Baseline Switch 2226 Plus is a versatile, easy-to-use configurable Switch. It is ideal for users who want the high-speed performance of 10/100 switching with the added functionality of Gigabit links, but do not need sophisticated management capabilities.

The Switch is shipped ready for use. No configuration is necessary, unless you want to configure advanced features such as VLAN support, link aggregation, and traffic prioritization.

Features and Capabilities

The Switch has 24 shielded RJ-45, 10/100 Mbps autonegotiating ports and two dual purpose 10/100/1000BASE-T ports that operate in conjunction with two Small Form Factor Pluggable (SFP) trans ceiver slots on the front panel for easy, flexible connection to fiber-based Gigabit media.

While there are four physical Gigabit ports, only a maximum of two can be operational at any given time.

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 1000BASE-T ports also support automatic 10/100/1000 Mbps speed detection.

10/100 Mbps connections on these 1000BASE-T

ports can operate in either half-duplex or full-duplex mode. 1000 Mbps connections, on the other hand, only operate in full duplex mode.

8 CHAPTER 1: INTRODUCING THE BASELINE SWITCH

SFP Ports

The two SFP ports support fiber Gigabit Ethernet short-wave (SX) and long-wave (LX) SFP transceivers in any combination. This offers you the flexibility of using SFP transceivers to provide connectivity between the Switch and a 1000 Mbps core network. When an SFP port is in operation, the corresponding 10/100/1000BASE-T port is disabled.

Traffic Prioritization

The Switch supports two types of traffic prioritization:

■ Prioritization of IP phone traffic

■ Priority Queuing

Prioritization of IP Phone Traffic

The Switch can recognize when an NBX phone is connected to any of the ports 1 to 24. The Switch will automatically detect the NBX phone when the phone starts up, and will ensure that traffic to and from the phone is given the highest priority.

To ensure that the NBX phone is recognized by the Switch during its initialization, do not connect any data source through the phone until the phone has finished its startup sequence.

Once the phone is available for use, any data source (for example, a computer) can then be connected to the phone’s pass-through port. This only applies if you use a single wall jack for your network connec tion and use the pass-through LAN port on the NBX phone.

Traffic Priority Queuing

The Switch also offers priority queuing. It examines each packet that it receives to determine if it is prior

ity-encoded. If a packet is priority-encoded, the Switch reads the priority level and determines whether the packet should be directed through the normal or high priority channel. This feature is useful, for example, during periods of excessive network load, when one type of traffic may require priority over another. The Switch is configured to comply with 802.1p, VLAN tagged frames.

Traffic prioritization ensures that high priority data is forwarded through the Switch without being delayed by lower priority data. It differentiates traffic into classes and prioritizes those classes automatically.

Traffic prioritization uses multiple traffic queues that are present in the hardware of the Switch to ensure that high priority traffic is forwarded on a different queue from lower priority traffic, and is given prefer

ence over that traffic. This ensures that time-sensitive traffic gets the highest level of service.

The 802.1D standard specifies eight distinct levels of priority (0 to 7), each of which relates to a particular type of traffic. The priority levels and their traffic types are shown in

Ta bl e 3 Priority Levels for Traffic Types

Priority Level Traffic Type

0 Best effort

1 Background

2 Standard (spare)

Ta bl e 3.

Physical Features 9

3 Excellent effort (business critical)

4 Controlled load (streaming multimedia)

5 Video (interactive media), less than 100

6 Voice (interactive voice), less than 10

7 Network control reserved traffic

The traffic prioritization feature supported by the Switch is compatible with the relevant sections of the IEEE 802.1D standard (incorporating IEEE 802.1p).

Physical Features

Figure 1 shows the front and rear panels of the

Switch. The numbers in this diagram refer to numbered sections in “Front Panel” on page 9 and “Rear

Panel” on page 12.

Figure 1 Front and Rear Panels

milliseconds latency and jitter

4 9 5

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) 24 RJ-45 Ports

WARNING: RJ-45 Ports. These are shielded RJ-45 data sockets. They cannot be used as standard tradi

tional 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 conven

tionnelles standard, ni pour la connection de l’unité à

un réseau téléphonique central privé ou public. Rac corder seulement connecteurs de données RJ-45,

systèmes de réseaux de téléphonie ou téléphones de

3C16475B

réseaux à ces prises.

Il est possible de raccorder des câbles protégés ou non protégés avec des jacks protégés ou non pro

tégés 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 pri

vatem oder öffentlichem Telefonnetzwerk gebraucht

10 CHAPTER 1: INTRODUCING THE BASELINE SWITCH

werden. Nur RJ-45-Datenanscluße, Telefonnetzsysteme or Netztelefone an diese Steckdosen anschließen.

Entweder geschützte oder ungeschützte Buchsen dürfen an diese Datensteckdosen angeschlossen wer den.

ADVERTENCIA: Puertos RJ-45. Son conectores de datos RJ-45 blindados. No pueden utilizarse como tomas de teléfono tradicionales estándar ni para conectar la unidad a una central de conmutación PBX tradicional ni a una red telefónica pública. Conecte sólo conectores de datos RJ-45, sistemas de telefonía de red local o teléfonos de red local a estas tomas. Es posible conectar cables de datos blindados o sin blin dar con clavijas blindadas o sin blindar a estos conectores de datos.

AVVERTENZA: Le porte RJ-45. Sono prese dati RJ-45 schermate. Non è pertanto possibile utilizzarle come normali prese telefoniche né per collegare l'unità a un PBX (Private Branch Exchange, centralino telefonico privato) o a una rete telefonica pubblica. Collegare a queste porte solo prese dati RJ-45, sistemi di telefonia o telefoni di rete. A queste prese dati è possibile colle gare cavi dati schermati o non schermati con connettori schermati o non schermati.

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

Ports 1 to 24 are autonegotiating — their speed and duplex mode (half-duplex or full-duplex) are automat

ically determined by the capabilities of the connected device.

CAUTION: The Switch supports full-duplex autone-

gotiation. If the connected device does not support autonegotiation, the Switch will operate in half-duplex mode (even if the attached device is oper

ating in full-duplex mode).

In such a configuration, you may notice some degradation of network performance. 3Com recommends that you use devices that are capable of autonegotia

tion (and that you ensure that autonegotiation is enabled, if it is a configurable option). (see

“Trouble-

shooting” on page 43).

(2) Module Active LEDs

The Module Active LEDs show the status of any SFP modules that are installed.

Status Meaning

Green Fiber SFP is inserted in the slot

Off No fiber SFP is inserted in the slot

(3) Link/Activity LEDs

The Link/Activity LEDs show the link status of ports and the speed of connected devices.

Status Meaning

Green The link is operating at 1000 Mbps

Yellow The link is operating at 10 or 100 Mbps

Flashing Green Packets are being received or transmit-

ted on the port at 1000 Mbps

Physical Features 11

Status Meaning

Flashing Yellow Packets are being received or transmit-

Flashing Yellow to Green

Off The link has not been established, either

ted on the port at 10 or 100 Mbps

Port disabled or link loopback error

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

■ Verify that the attached device is

powered on

■ Verify that the cable or fiber is the

correct type and is not faulty

■ For fiber connections, ensure that the

receive (RX) and transmit (TX) cable connectors are not swapped

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 3Com network sup plier for further advice.

(4) 10/100/1000BASE-T/SFP Ports

Ports 25 and 26 are combination Gigabit RJ-45 ports with shared Small Form Factor Pluggable (SFP) trans

ceiver slots. If an SFP transceiver (purchased separately) is installed in a slot and is active, the associated RJ-45 port of the same number is disabled.

The 1000BASE-T RJ-45 ports support automatic MDI/MDI-X operation, so you can use straight-through or crossover cables for all network connections to workstations or servers, or to other switches or hubs.

groups or to create a high-capacity aggregated link backbone connection.

SFP ports are numbered 25 and 26 on the Switch. When an SFP port is active, it has priority over the 10/100/1000 port of the same number. The corre

sponding 10/100/1000 port is disabled when an SFP transceiver is plugged in.

(5) Power LED

The Power LED shows the power status of the Switch.

Status Meaning

Green The unit is powered on and ready for use

Off The unit is not receiving power:

■ Verify that the power cord is connected cor-

rectly

■ If the unit still does not operate, contact your

3Com network supplier

Flashing Green

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

■ Power-on self-test is in progress

Switch is in fail-safe mode.

12 CHAPTER 1: INTRODUCING THE BASELINE SWITCH

(6) Duplex LEDs

The second and fourth (bottom) row of Status LEDs, which are colored yellow, show the duplex status of the related ports.

Status Meaning

Off No link, link is not yet negotiated, or the port is

Yel lo w The port is operating in full-duplex mode

operating in half-duplex mode

(7) Self-Adhesive Pads

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

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 under

side of the unit. Place the unit on top of the lower unit, ensuring that the pads locate with the recesses of the lower unit.

tion, refer to “Resetting to Factory Defaults” on

page 43.

Package Contents

The 3Com Baseline Switch 2226 Plus package includes the following items:

■ One 3Com Baseline Switch 2226 Plus unit

■ One power cord

■ Four standard height, self-adhesive rubber pads

■ One mounting kit

■ One CD-ROM, which contains this User Guide and

the 3Com Discovery application

■ One warranty flyer

Before installing and using the Switch, verify that your Switch package has all these items. If any of the above items are damaged or missing, contact your 3Com network supplier immediately.

Rear Panel

(8) Power Supply

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

(9) Recovery Button

Use the Recovery button on the rear panel to reset the Switch to its factory defaults. For more informa

INSTALLING THE SWITCH

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

■ Positioning the Switch

■ Rack-Mounting or Free-Standing

■ Supplying Power to the Switch

■ Connecting a Network Device

■ Performing Spot Checks

Before You Begin

WARNING: Safety Information. Before installing or removing any components from the Switch or carry ing out any maintenance procedures, read the safety information provided in

AVERTISSEMENT: Consignes de Sécurité. Avant d'installer ou d'enlever tout composant du Switch ou d'entamer une procédure de maintenance, lisez les informations relatives à la sécurité qui se trouvent dans l'Appendice B (

WARNHINWEIS: Sicherheitsinformationen. Bevor Sie Komponenten aus dem Switch entfernen oder dem Switch hinzufuegen oder Instandhaltungsarbe

Appendix B of this guide.

Appendix B) de ce guide.

iten verrichten, lesen Sie die Sicherheitsanweisungen, die in Anhang B ( aufgefuehrt sind.

ADVERTENCIA: Información de Seguridad. Antes de instalar o extraer cualquier componente del prod uct o de realizar tareas de mantenimiento, debe leer la información de seguridad facilitada en el Apéndice B (

Appendix B) de esta guía del usuario.

AVVERTENZA: Informazioni di Sicurezza. Prima di installare o rimuovere qualsiasi componente dal prod uct o di eseguire qualsiasi procedura di manutenzione, leggere le informazioni di sicurezza riportate nell'Appendice B ( per l'utente.

Appendix B) in diesem Handbuch

Appendix B) della presente guida

Positioning the Switch

The Switch is suitable for use in an office environment where it can be free-standing or mounted in a stan dard 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:

14 CHAPTER 2: INSTALLING THE SWITCH

■ 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 net work.

■ Water or moisture cannot enter the case of the

unit.

■ Airflow around the unit and through the vents in

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

■ The air is as free of dust as possible.

■ Temperature operating limits are not likely to be

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

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 dis charge can cause reliability problems in your equipment.

■ Die Kabel nicht in der nahe von elektrischen

Storquellen befinden. Das schliest Aufzugss

chachte, Mikrowellen und Klimaanlagen ein. Elektromagnetische Felder konnen die Signale in den Kupferleitungen storen, und Fehler verursachen,

was die Verlangsamung Ihres Netzwerkes zur Folge haben kann.

■ Weder Wasser noch Feuchtigkeit in das Gehause

eindringen kann.

■ Die Luftzirkulation um den Switch und durch die

Offnungen des Gehauses nicht behindert wird. 3Com empfiehlt das Sie 25mm (1 Inch) Zwischen

raum sicherstellen.

■ Die Luft so frei wie moglich von Staub ist.

■ Es unwahrscheinlich ist das die Betriebstemperatur

uberschritten wird. 3Com empfiehlt das Sie den Switch in einer sauberen, klimatisierten Umgebung installieren.

Rack-Mounting or Free-Standing

The unit can be mounted in a 19-inch equipment rack

using the supplied mounting kit, (see

“Using the Mounting Kit” on page 15), or it can be free-stand-

ing. Do not place objects on top of the unit or stack.

Aufstellen des Switch

Bei der Entscheidung wo Sie den Switch positionieren, stellen Sie sicher das:

■ Der Switch zuganglich ist und die Kabel leicht

angeschlossen werden konnen.

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.

Rack-Mounting or Free-Standing 15

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, take note of the guidelines given in

“Positioning the Switch” on

page 13.

The Switch is 1U (1.75 in.) high and will fit in a standard 19-inch rack.

CAUTION: Before continuing, disconnect all cables from the unit. Remove the self-adhesive pads from the underside of 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 2 Inserting the Screws

4 Repeat the two previous steps for the other side of

the unit.

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

suitable screws (not provided). Ensure that the venti lation holes are not obstructed.

6 Reconnect the network cables.

Montagesatz Anweisungen

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

“Aufstellen des Switch”.

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

16 CHAPTER 2: INSTALLING THE SWITCH

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

1 Plazieren Sie die Baugruppe aufrecht auf einer harten,

ebenen Fläche mit der Vorderseite zu Ihnen.

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 Widerholen Sie letzten beiden Schritte auf der

anderen Seite der Baugruppe.

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

penträger 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 four 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 cor ner. 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 out ages. 3Com recommends that you install power conditioning, especially in areas prone to black outs, 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 light ning and power surges.

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

CAUTION: The Switch has no ON/OFF switch; the only method of connecting or disconnecting main power is by connecting or disconnecting the power cord.

To power on the Switch:

1 Plug the power cord into the power socket on the

rear panel of the Switch. Refer to

“(8) Power Supply”

on page 12 for more information.

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

Power LED” on page 11 for more information.

“(5)

Connecting a Network Device 17

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.

Ta bl e 4 summarizes the possible colors for the Power

LED after POST.

Ta bl e 4

Color State

Green The unit is powered on and ready for use

Yel lo w Power-on self-test or loopback test failed.

Off The unit is not receiving power:

Possible Power LED Colors After POST

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

■ Verify that the power cord is connected

correctly, and then try powering on the Switch again

■ If the Switch still does not operate, con-

tact your 3Com network supplier

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 assis-

tance.

Connecting a Network Device

To connect a network device to the Switch, use Category 5 unshielded or shielded (screened) 100 Ohm TP cables (or Category 3 cables for 10 Mbps connec tions).

For optimal connections, ensure that the cable length for each connection is not longer than 100 m (328 ft).

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 success fully completed.

■ Reset the Switch. See “Resetting to Factory

Defaults” on page 43.

18 CHAPTER 2: INSTALLING THE SWITCH

Figure 3 Connecting Devices to the Switch

Endstations on switched 100 Mbps connections

Endstations on switched 10 or 100 Mbps connection

1000 Mbps copper or fiber connection to backbone or server/workstation

Server on switched 1000 Mbps connection

1000 Mbps link

10 or 100 Mbps link

Baseline 10/100 switch

Baseline Switch 2226 Plus

To connect a device to the Switch:

1 Connect one end of the cable to an RJ-45 port on the

Switch.

2 Connect the other end to the appropriate RJ-45 port

on the connecting device.

For 1000BASE-T operation, 3Com recommends using Category 5e or 6 cables.

Using SFP Transceivers

The following sections describe how to insert and remove an SFP transceiver from an SFP slot.

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 Corporation World Wide Web site, enter this URL into your Internet browser:

http://www.3com.com

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

Inserting an SFP Transceiver

To be recognized as valid, the SFP transceiver must be one of the following:

■ 1000BASE-SX SFP transceiver – Use this transceiver

to connect the Switch directly to a multimedia 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 con ditioned launch cable.

If the SFP transceiver is faulty, it will not operate within the Switch. See

page 43.

“Troubleshooting” on

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

To insert an SFP transceiver:

1 Hold the transceiver so that the fiber connector is

toward you and the product label is visible, as shown

Performing Spot Checks 19

in Figure 4. Ensure the wire release lever is closed (in the upright position).

Figure 4 Inserting the SFP Transceiver

Product label

Wire release

lever

Suitable slot

n host Switcho

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 then re-insert it.

3 Remove the plastic protective cover, if fitted.

4 Connect the fiber cable.

5 The transceiver connects to the network using a

duplex LC connector. Attach a male duplex LC con nector 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 it 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 bl e 5.

20 CHAPTER 2: INSTALLING THE SWITCH

Ta bl e 5 Items to Check

Item Verify That

Cabling All external cabling connections are secure

Cooling fan Where possible, check that the cooling fan

and that no cables are pulled taut

is operating by listening to the unit. The fan is fitted on the right side of the unit (when viewed from the front).

If you experience any problems operating the Switch, refer to

“Troubleshooting” starting on page 43.

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 the gain access to the Web interface using the Discovery appli cation. 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

■ Running the Discovery Application

■ Logging On to the Web Interface

■ Navigating the Web Interface

Requirements for Accessing the Web Interface

To connect to the Web interface, you need the following:

■ The Discovery application, which is included on

3Com Baseline Switch 2226 Plus CD-ROM that is supplied with your Switch

■ A computer that is connected to the Switch and

that has a Web browser

Running the Discovery Application

The 3Com Baseline Switch 2226 Plus CD-ROM contains, among others, the Discovery application.

To use Discovery to connect to the Web interface, do the following:

1 On a computer that is connected to the Switch, insert

the CD-ROM into its CD drive.

Discovery should start automatically. If it does not start automatically, go to the the CD-ROM, and then double-click

The Welcome screen of Discovery appears.

\Discovery folder on

discovery.exe.

+ 48 hidden pages