BASELINE SWITCH 2226 PLUS - Network switch 3COM - Free user manual and instructions

USER MANUAL BASELINE SWITCH 2226 PLUS 3COM

Baseline Switch 2226 Plus (3C16475BS) User Guide http://www.3com.com/ Part No. DUA16475B-SAAA01 Published March 2005 3Com Corporation • 350 Campus Drive • Marlborough • MA USA 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 and the 3Com logo are registered trademarks of 3Com Corporation. Microsoft, MS-DOS, Windows, and Windows NT are registered trademarks of Microsoft Corporation. IEEE and 802 are registered trademarks of the Institute of Electrical and Electronics Engineers, Inc. Netscape Navigator is a registered trademark of Netscape Communications. JavaScript is a trademark of Sun Microsystems. 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. Improving our environmental record on a continual basis. 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. Environmental Statement about the Documentation The documentation for this product is printed on paper that comes from sustainable, managed forests; it is fully biodegradable and recyclable, and is completely chlorine-free. The varnish is environmentally-friendly, and the inks are vegetable-based with a low heavy-metal content. CONTENTS 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

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 Physical Features 9 Front Panel 9 Rear Panel 12 Package Contents 12

OBTAINING SUPPORT FOR YOUR PRODUCT

GLOSSARY 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

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 Netzwerkkomponenten 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 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. The words “enter” and “type” When you see the word “enter” in this guide, you must type something, and then press Return or Enter. Do not press Return or Enter when an instruction simply says “type.” Words in italics Italics are used to:

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 Documentation In addition to this guide, each 3Com Baseline Switch 2226 Plus documentation set includes the following:

Online Help – Accessible from the Web interface, provides information that helps you perform tasks using the Web interface.

Release Notes – Provide information about the current software release, including new features, modifications, and known problems. 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 part number (on the title page)

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.

This chapter provides an overview of the features and capabilities of the 3Com® Baseline Switch 2226 Plus. It also identifies the contents of the Switch package and helps you get to know the physical features of the device. 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) transceiver 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.

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 connection 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 priority-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 preference 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 Table 3. Table 3 Priority Levels for Traffic Types Priority Level Traffic Type

Standard (spare) Physical Features Front Panel

Excellent effort (business critical)

Video (interactive media), less than 100 milliseconds latency and jitter The front panel of the Switch contains a series of indicator lights (LEDs) that help describe the state of various networking and connection operations.

Voice (interactive voice), less than 10 milliseconds latency and jitter (1) 24 RJ-45 Ports

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

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

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 supplier for further advice. 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 remote 1000 Mbps workgroups 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 corresponding 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 correctly

If the unit still does not operate, contact your 3Com network supplier Flashing Green

Power-on self-test is in progress Yellow

Power-on self-test or loopback test failed. Switch is in fail-safe mode. (4) 10/100/1000BASE-T/SFP Ports Ports 25 and 26 are combination Gigabit RJ-45 ports with shared Small Form Factor Pluggable (SFP) transceiver 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.

(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 operating in half-duplex mode Yellow The port is operating in full-duplex mode tion, refer to “Resetting to Factory Defaults” on page 43. Package Contents The 3Com Baseline Switch 2226 Plus package includes the following items:

One power cord (7) Self-Adhesive Pads

Four standard height, self-adhesive rubber pads The unit is supplied with four self-adhesive rubber pads.

One CD-ROM, which contains this User Guide and the 3Com Discovery application

One warranty flyer 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 with the recesses of the lower unit. 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- 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.

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

Rack-Mounting or Free-Standing

Supplying Power to the Switch

Connecting a Network Device

Connecting a Network Device

Performing Spot Checks Before You Begin

WARNING: Safety Information. Before installing or

removing any components from the Switch or carrying out any maintenance procedures, read the safety information provided in Appendix B of this guide.

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.

Airflow around the unit and through the vents in the side of the case is not restricted (3Com recommends 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 discharge can cause reliability problems in your equipment. Aufstellen des Switch Bei der Entscheidung wo Sie den Switch positionieren, stellen Sie sicher das:

Verify that the power cord is connected correctly, 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 43.

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:

Contact your 3Com network supplier for assistance. 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 connections). For optimal connections, ensure that the cable length for each connection is not longer than 100 m (328 ft).

Figure 3 Connecting Devices to the Switch Baseline 10/100 switch Endstations on switched 100 Mbps connections Baseline 10/100 switch Endstations on switched 100 Mbps connections The following list of approved SFP transceivers is correct at the time of publication: 1000 Mbps copper or fiber connection to backbone or server/workstation Baseline Switch 2226 Plus Approved SFP Transceivers Endstations on switched 10 or 100 Mbps connection 1000 Mbps link 10 or 100 Mbps link Server on switched 1000 Mbps connection To connect a device to the Switch: 1 Connect one end of the cable to an RJ-45 port on the Switch.

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 conditioned launch cable. 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. 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. If the SFP transceiver is faulty, it will not operate within the Switch. See “Troubleshooting” on page 43. 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 in Figure 4. Ensure the wire release lever is closed (in the upright position). Figure 4 Inserting the SFP 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. Product label To remove an SFP transceiver: 1 Disconnect the cable from the transceiver. 2 Move the wire release lever downwards until it is Wire release lever pointing toward you. 3 Pull the wire release lever toward you to release the Suitable slot on host Switch catch mechanism. The SFP transceiver should slide out easily. 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 connector on the network cable into the duplex LC connector on the transceiver. 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 Table 5.

Table 5 Items to Check Item Verify That Cabling All external cabling connections are secure and that no cables are pulled taut Cooling fan Where possible, check that the cooling fan 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.

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 application. It also introduces the menu items and buttons that are available on the Web interface.

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.

Requirements for Accessing the Web Interface Discovery should start automatically. If it does not start automatically, go to the \Discovery folder on the CD-ROM, and then double-click discovery.exe.

Running the Discovery Application The Welcome screen of Discovery appears.

Logging On to the Web Interface

Navigating the Web Interface The following topics are covered: 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

Figure 5 Welcome Screen of Discovery 2 If the computer has multiple network adapters, select the adapter that connects the computer to the Switch, and then click Next. If the computer has only one adapter, click Next. Discovery searches the network for 3Com devices. When detection is complete, the Discovered Devices screen displays detected network devices. Figure 6 Discovered Devices Screen 3 On the Discovered Devices screen, click Baseline Switch 2226 Plus, and then click Next. The Completing the 3Com Discovery Application screen appears. 4 Click Finish. The Web interface loads in your Web browser. Logging On to the Web Interface 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. Navigating the Web Interface

The logon screen also displays the IP address that the Switch is currently using. related screen appears in the main part of the interface. Figure 7 Logon Screen Figure 8 Switch Screen Layout Menu Help To log on to the Web interface: 1 In Username, type admin. 2 Leave the Password field blank. 3 Click OK. Table 6 lists the available items on the menu. Table 6 Available Menu Items Menu Item Description Status Provides a summary of the Switch’s basic settings and versions of current components Password Allows you to change the administrator password IP Settings Allows you to configure the IP address settings of the Switch Port Configuration Allows you to configure the Switch’s port settings 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. Menu The menu is located on the left side of the Web interface. When you click an item on the menu, the

Menu Item Description VLANs Allows you to create VLAN groups, add port members, and specify how VLAN tagging is used Link Aggregation Allows you to set up and maintain trunk membership for port groups Statistics Displays the number of packets received and transmitted from each individual port Traffic Monitoring Allows you to perform port traffic monitoring on the Switch. To monitor a port, you will also need a network analyzer. Traffic Prioritization Allows you to configure traffic prioritization for IP phones that are connected to the Switch Upgrade Allows you to upgrade the firmware on the Switch. Before you can perform an upgrade, you first need to download firmware updates from the 3Com Web site. Support Displays 3Com contact information and describes how to use the online help system Log Out Allows you to securely log off the Web interface Buttons Depending on the screen that is currently displayed, the following buttons may appear:

Apply – Click to save and apply any changes that you have made

Cancel – Click to discard any unsaved changes

Help – Click to display the context-sensitive help information for the screen that is currently displayed. The help pages provide information on the tasks that you can perform on each screen. Accessing the Interface Without Using Discovery The Discovery application works by automatically detecting the IP address that is assigned to the Switch, and then using that address to connect to the Web interface. If you know the Switch’s IP address, you can access the Web interface without using Discovery. This section describes how to access the interface directly, without using Discovery. If you do not configure the Switch’s IP address settings, it will perform auto IP configuration to assign an IP address to itself. For more information, refer to “Automatic IP Configuration” on page 29. To determine the IP address that the Switch will assign to itself during auto IP configuration, check the sticker on the base of the Switch. This sticker contains the MAC address and default IP address of the Switch. DHCP Assigned IP Address If you set the IP address mode to DHCP, check the DHCP server for the IP address that is assigned to the Switch, and then use that IP address to access the Web interface. Accessing the Interface Without Using Discovery For example, if the DHCP server assigned the IP address 192.168.0.123 to the Switch, start your Web browser, and then type http://192.168.0.123. Manually Assigned (Static) IP Address If you assigned a static IP address to the Switch, you need to use that IP address to access the Web interface the next time you want to configure the Switch. For example, if you assigned the Switch the IP address

192.168.0.123, start your Web browser, and then

type http://192.168.0.123.

This chapter provides information on how to configure the Switch’s advanced features. Topics include:

Changing the Admin Password

Modifying the IP Address Settings

Setting the Traffic Priority

Upgrading the Firmware

Upgrade the firmware Viewing Status Information The Status screen, which automatically loads after you log on to the Web interface, provides a snapshot of the Switch’s basic settings and versions of current components. Figure 9 Status Screen Configuration Overview The Switch is shipped ready for use. 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. You only need to access the Web interface if you want to:

Set the administration password to the Web interface

Assign an IP address to the Switch

Configure the Switch’s advanced features Table 7 lists the information that you can view on the Status screen.

Table 7 Items on the Status Screen Item Description The default admin account settings are:

User name – admin Firmware Version Displays the version of the firmware that is currently installed on the Switch

Password – blank (no password) DHCP Client Shows Enable if the Switch obtained its IP address from a DHCP server on the network. Otherwise, this field shows Disable. To ensure that unauthorized users do not access the Web interface, 3Com recommends that you set an admin password when you first configure the Switch. IP Address Displays the IP address that is assigned to the Switch, whether it was obtained from a DHCP server or you manually set

Subnet Mask Displays the subnet mask that is assigned to the Switch Gateway Displays the gateway address (if any) that is assigned to the Switch MAC Address Displays the MAC or physical address of the Switch ARL Ageing Displays the number of seconds before the Switch removes dynamically learned addresses from its MAC address table. This is set to 300 seconds and is not configurable. If you request for technical assistance from 3Com Support, you may be asked to print out the information on this screen. Changing the Admin Password To prevent unauthorized users from accessing the Web interface and modifying the Switch’s settings, the interface is password-protected. Even if you do not intend to actively manage the switch, 3Com recommends that you change the password to prevent unauthorized access to your network. Figure 10 Change Administration Password Screen To set the admin password: 1 On the menu, click Password. The Change Adminis- tration Password screen appears. 2 In Old Password, type your current password. By default, the Switch does not have any password. If this is your first time to access this screen or if you Modifying the IP Address Settings have not previously set a password, leave this field blank. 3 In New Password, type the password that you want to set. 4 In Confirm Password, retype the password you typed in step 3 to confirm. The password is case-sensitive. 5 Click Apply. If you want to modify the admin password later on, follow the same procedure. If you forget the administration password after you set it, refer to “Forgotten Password” on page 44 for information on how to regain access to the Web interface. Modifying the IP Address Settings To enable devices on the network to communicate with the Switch, you need to assign an IP address to it — either by DHCP or by manually assigning a static IP address. By default, the Switch performs automatic IP configuration and assigns an IP address to itself. This is necessary for the Discovery application to be able to connect to the Web interface.

Automatic IP Configuration When you power on the Switch for the first time, it automatically uses the default IP address

169.254.x.y, where x and y are the last two bytes of

its MAC address. To determine the exact IP address that the Switch assigns to itself during auto IP configuration, check the sticker on the base of the Switch. This sticker contains the MAC address and default IP address of the Switch. To detect its IP information using the automatic configuration process, the Switch goes through the following sequence of steps: 1 The Switch tries to configure itself with the default IP address 169.254.x.y, where x and y are converted from the last two bytes of its MAC address. For example, if the MAC address were 08004E000102, the IP address would be 169.254.1.2. This address is used if the Switch is operating in a standalone mode, or no other switches on the network have this IP address. The Switch also assigns the subnet mask 255.255.0.0 (default class B mask) to itself. 2 If this default IP address is already in use on the net- work, then the Switch detects this, and increments the last byte of the MAC address by one to generate its IP address. The IP address would therefore become 169.254.1.3. 3 The Switch repeats step 2 until an unused IP address is found.

3Com recommends using automatic IP configuration only for the initial setup. Once you gain access to the console, you should assign an IP address to the Switch (either by using DHCP or assigning a static IP address) to ensure successful communication between the Switch and other network devices. Table 8 IP Setting Options Option Description IP Address Mode Setting the IP Address To set the IP address for the Switch: 1 Click IP Settings on the menu. The IP Settings screen IP Address appears. Figure 11 IP Settings Screen Specify how the Switch will get its IP address. Available options include:

DHCP – Select this option if you have a DHCP server on the network and you want the Switch to automatically obtain an IP address from it

Static – Select this option if you want to manually assign an IP address to the Switch Specify an IP address that you want to assign to the Switch. This option is only available if IP Address Mode is set to Static. The IP address that is assigned to the Switch also becomes the IP address for VLAN 1. Subnet Mask Specify a subnet mask address that you want to assign to the Switch. This option is only available if IP Address Mode is set to Static. The default subnet mask is

2 Configure the Switch’s IP settings. Available options are listed in Table 8. Default Gateway Specify the IP address of the gateway router between this Switch and management stations on other network segments. This option is only available if IP Address Mode is set to Static. MAC Address Read-only field that displays the Switch’s MAC or physical address 3 After you configure the Switch’s IP address settings, click Apply to save your changes. Configuring Port Settings Configuring Port Settings Using the Web interface, you can configure the speed/duplex and flow control settings of each port. You can also shut down or disable ports from the Web interface.

Table 9 Port Configuration Summary Screen Item Description Port Viewing Port Settings To view the current port settings, click Port Configuration on the menu. The Port Configuration screen appears (see Figure 12), displaying the status of all ports and a summary of their current settings. The physical number of the port that corresponds to the numbering of the ports on the front of the unit. Note that ports 25 and 26 are dual function ports. When the Small Form Factor Pluggable (SFP) transceiver ports are not in use, the number refers to the RJ-45 port. When an SFP module is inserted, the port number refers to this port, even if a fiber cable is not inserted. To configure the settings of a particular port, click the port number. The items AL1 to AL4 refer to trunk groups. Use these to configure the settings of a trunk’s member ports. See “Configuring Trunk Settings” on page 38. Figure 12 Port Configuration Screen Link Status Indicates whether the port is currently active (up) or not (down) Speed/Duplex If the link is up, indicates the speed and duplex settings of the port Flow Control If the link is up, indicates whether flow control is enabled on the port Default Port Settings If you do not configure the Switch’s port settings, the ports will use the following default settings: Table 9 describes the information that appears on the Port Configuration screen.

All ports are enabled

Autonegotiation is enabled

Flow control is enabled

All ports are set to priority zero

Changing a Port’s Settings If a port is a member of an aggregated link (or trunk), you will not be able to configure its individual port settings. All member ports of an aggregated link will have the same settings, and you can configure these by clicking the AL link on the Port Configuration screen. See “Configuring Trunk Settings” on page 38. To change the settings of a port: 1 Under the Port column of the Port Configuration screen, click the port number that you want to configure. The Port Settings screen appears, as shown in Figure 13. Figure 13 Port Settings Screen 2 Configure the port settings. Available options are listed in Table 10. Table 10 Port Setting Options Option Description Status

Enable – Activates the port

Disable – Shuts down or disables the port By default, admin setting is set to enable. Auto Negotiate Autonegotiation, which is enabled by default, sets the optimum combination of speed and duplex that can be supported by both ends of the link. Available options for autonegotiation include:

Enable – Enables autonegotiation for the port. If autonegotiation is enabled, options for Speed Duplex are unavailable.

Disable – Disables autonegotiation for the port. If autonegotiation is disabled, you need to set the speed and duplex mode in Speed Duplex. Configuring VLANs Option Description Speed Duplex Sets the preferred speed and duplex mode for the port. This option is only available when autonegotiation for the port is disabled. Available speed and duplex modes include: Flow Control

1000Mbps Full (for ports 25 and 26 only) – See “Speed/Duplex for 1000 Mbps Connections” on page 33. When enabled, controls packet flow so that a sending device does not transmit more packets than a receiving device can process. If flow control is disabled, packets may be dropped under certain periods of high traffic loads. By default, flow control is enabled.

1000Mbps connections are always full-duplex. Half-duplex connections are only available for 10Mbps and 100Mbps settings. CAUTION: Before manually setting a port to full-duplex, verify that the device connected to the port is also manually set to the same speed and duplex setting. If connecting link partners are left to autonegotiate for a link manually set on this switch to full-duplex, they will always negotiate to half-duplex, resulting in a duplex mismatch. This can result in a significant reduction in network performance. If you are unsure of how to configure the speed/duplex setting, simply enable autonegotiation for the port. You cannot modify the speed/duplex settings of ports that are members of a trunk or aggregated link. Supported SFP transceivers only operate at 1000Mbps full-duplex. Inserting an SFP transceiver into a gigabit port disables the corresponding RJ-45 port, even if no fiber cable is inserted. 3 Click Apply to save your settings. To configure another port, click Port Configuration on the menu again, and then click the port number that you want to configure. Speed/Duplex for 1000 Mbps Connections You cannot preset the speed to 1000Mbps. To run a port at 1000Mbps, you must enable autonegotiation for the port. When autonegotiation is enabled, the Switch will automatically connect at 1000Mbps, providing the connected device also supports this speed. Configuring VLANs You can use the Switch to create VLANs to organize any group of ports into separate broadcast domains. VLANs confine broadcast traffic to the originating group and help eliminate broadcast storms in large networks. This also provides for a more secure and cleaner network environment. You can create up to 64 VLANs, add specific ports to a chosen VLAN (so that the port can only communicate with other ports on the VLAN), or configure a port make it a member of all VLANs.

Communication between different VLANs can only take place if they are all connected to a router or layer 3 switch. Creating a VLAN Use the VLANs page to create VLANs on the Switch. To propagate information about VLAN groups used on this Switch to external devices, you must specify a VLAN ID for each VLAN. Figure 14 VLANs Screen choose to connect all ports to VLANs other than VLAN 1, you will no longer be able to access the Web interface. If this happens, you will need to reset the Switch to factory settings. To create a VLAN: 1 On the menu, click VLANs. The VLANs screen appears. 2 In VLAN ID, click Create New VLAN. 3 In VLAN ID (1-4904), type an unused ID number for the VLAN that you are creating. VLAN IDs range from 1 to 4904. Figure 15 Create VLANs Screen Ports belonging to a VLAN must be set to either U (uplink) or D (desktop). Desktop VLAN ports can only be members of one VLAN at any time. Setting a port as an uplink (tagged) VLAN port forwards all VLAN traffic from the other ports on the Switch to this port. Use the uplink port function to connect the Switch to the backbone of the network. Traffic from all the VLANs on the switch is automatically forwarded to the uplink port or ports. By default, all ports belong to VLAN 1. 4 Define the VLAN membership by setting the state of each port. To change states, click the icon under the port number repeatedly to cycle through the different states. Available states include:

D – Desktop egress packets 5 Click Apply to create the VLAN. CAUTION: At least one port must always be a member of VLAN 1 (the management VLAN). If you Configuring VLANs For examples on setting up VLANs, refer to “Sample VLAN Configurations”.

VLAN1 and the ports on VLAN2 cannot communicate with each other, do the following: 1 Create a new VLAN and set the VLAN ID to 2. Refer Sample VLAN Configurations To illustrate how you can segment network devices that are connected to the Switch, the following sample configurations are provided. Setting Up Two VLANs on the Same Switch Figure 16 illustrates how you can set up a simple VLAN on the Switch using desktop connections. Figure 16 Desktop VLAN Configuration Endstations in VLAN 2 Endstations in VLAN 1 Baseline Baseline Switch Switch 2250 2226 Plus Server in VLAN 1 Server in VLAN 2 If you want to add ports 7, 8, and 16 to VLAN2 (as shown in Figure 16), so that the ports on the default to “Creating a VLAN” for instructions. VLAN1 is the default VLAN and already exists. 2 Set ports 7, 8, and 16 to D (desktop egress packet). 3 Click Apply. Ports 7, 8, and 16 now belong to VLAN2, and will not be able communicate with any other ports, unless you add another port to the VLAN or change the port configuration. Setting Up VLAN Across Two Switches This example explains how you can set up a VLAN across two Switches using uplink connections. This enables ports that are members of the same VLAN (but are on different switches) to communicate, provided that a port on each Switch is set to uplink, and that these ports are connected.

Figure 17 Uplink VLAN Configuration Endstation in VLAN 1 (Desktop) Server in VLAN 1 (Desktop) Endstation in VLAN 2 (Desktop) Click Apply. 4 Connect the uplink port on Switch 1 (in this example, port 16) to the uplink port on Switch 2 (in this example, port 8). Those ports on Switch 1 that are members of VLAN2 can now communicate with those ports on Switch 2 that are members of VLAN2. Switch 1 Switch 2 Port 16 in VLANs 1 and 2 (Uplink) Port 8 in VLANs 1 and 2 (Uplink) Removing a VLAN To remove an existing VLAN: 1 In the VLAN ID list, select the VLAN ID that you want to delete. Endstation in VLAN 2 (Desktop) 2 Click Remove. Server in VLAN 2 (Desktop) Endstation in VLAN 1 (Desktop) To set up the configuration shown in Figure 17, do the following: 1 Create VLAN2 on both Switch 1 and Switch 2, and assign the same name to it. You need not create VLAN1 since it exists by default. 2 On Switch 1, set the ports that you want to be part of VLAN2 to D (desktop egress packet). Set one port (for example, port 16) to U (uplink egress packet). Click Apply. 3 On Switch 2, set the ports that you want to be part of VLAN2 to D (desktop egress packet). Set one port (for example, port 8) to U (uplink egress packet). The VLANs page refreshes, and the VLAN ID that you deleted disappears from the VLAN ID list. Configuring Link Aggregation Link aggregation, also called “port trunking”, refers to bonding multiple ports into a single group to effectively combine the bandwidth into a single connection or a “trunk”. If you are connecting the Switch to another switch or to an Internet backbone, you can aggregate links on the Switch to increase throughput and prevent packet loopback between switches. For link aggregation to work, the trunks must be configured on both ends (switches). Configuring Link Aggregation The Switch does not support the Link Aggregation Control Protocol (LACP), which is specified in IEEE 802.3ad. Trunk Membership The Switch has four pre-defined trunks, each of which can support up to eight ports. Table 11 lists the possible membership groups for each trunk.

If a port is a member of an aggregated link (or trunk), you will not be able to configure its individual port settings. All member ports of an aggregated link will have the same settings, and you can configure these by clicking the AL link on the Port Configuration screen. See “Configuring Trunk Settings” on page 38. Adding Ports to a Trunk Table 11 Port Groups and Members Port Group Ports AL1 Ports 1-4, 13-16 AL2 Ports 5-8, 17-20 AL3 Ports 9-12, 21-24 AL4 Ports 25 and 26 (RJ-45 ports only) To add ports to a trunk: 1 On the menu, click Link Aggregation. The Link Aggre- gation screen appears. Figure 18 Link Aggregation Screen These four port groups correspond to the four separate physical connector blocks on the front panel of the Switch. You cannot trunk ports that belong to different port groups. A trunk can consist of either 10/100 ports or 10/100/1000 ports (fixed ports 25 and 26). It is not possible to have a trunk containing a mixture of 10/100 and 10/100/1000 ports. Adding port 25 or 26 to a trunk containing 10/100 ports will result in an error. A trunk created using ports 25 and 26 can only use the fixed RJ45 10/100/1000 ports. SFP ports cannot be aggregated. 2 Add ports to a trunk by selecting the option buttons for the ports. For example, if you want to add ports 1 to 4 to Trunk 1, click the option buttons under ports 01 to 04 that are on the same row as Trunk 1. Each trunk must not have more than eight member ports. 3 Click Apply.

CAUTION: If you try to add a port to a trunk and the speed setting of the port to be added does not match that of the trunk, an error message appears and port will not be added to the trunk. Configuring Trunk Settings Viewing Statistics The Statistics screen shows a summary of traffic statistics for all ports, as shown in Figure 20. Figure 20 Statistics Screen Ports that are members of the same trunk will have the same speed/duplex, autonegotiation, and flow control settings. You cannot configure these settings for individual member ports. To configure the settings of a trunk’s member ports: 1 On the menu, click Port Configuration. The Port Con- figuration screen appears. 2 Under the Port column, click the port group that you want to configure. The Port Settings screen appears. Figure 19 Port Settings Screen Figures that appear onscreen indicate the number of packets transmitted (Tx) and received (Rx).

To reset all packet counts to zero, click Clear Counters.

To view detailed statistics for each port, click the port number. The statistics page for the port appears, as shown in Figure 21. 3 Configure the status, autonegotiation, speed/duplex, and flow control settings of the trunk as you would configure an individual port (see available options in Table 10). Note however that these settings will be applied to all members of the trunk. 4 Click Apply to save your changes. Monitoring Traffic Figure 21 Port Statistics Screen

toring, the Switch takes all the traffic going in and out of the monitor port and copies it to the analysis port. CAUTION: The analysis port (Mirror From) should have a higher bandwidth than the monitor port (Mirror From). Otherwise, the Switch may not be able to copy all traffic effectively during periods of high traffic. To set up traffic monitoring for a port: 1 Attach a network analyzer to a port. 2 Access the Web interface, and then click Traffic Mon- itoring on the menu. 3 On the Port Mirroring screen, select the Enable check box. Figure 22 Traffic Monitoring Screen Figures on the Statistics screen for individual ports are not updated in real time. To view the latest statistics for the port, click Refresh. Monitoring Traffic The Switch allows you to monitor traffic going in and out of a particular port. For traffic monitoring to work, you need to attach a network analyzer to one port and use it to monitor the traffic of other ports in the stack. To set up traffic monitoring, you need to set an analysis port (the port that is connected to the analyzer), and a monitor port (the port that is to be monitored). Once the pair is defined, and you enable traffic moni- 4 In Mirror From, click the port number that you want to monitor. Only one port can be selected from the Mirror Form row, which means that you can only monitor one port at any given time. 5 In Mirror To, click the port number to which the port analyzer is connected. Traffic to and from the port selected in Mirror From will be forwarded to this port.

6 Click Apply. For information on how to interpret the output on the port analyzer, refer to its accompanying documentation. Setting the Traffic Priority You can configure traffic prioritization for devices and view a list of detected IP phones on the Traffic Prioritization screen. To access this screen, click Traffic Prioritization on the menu. Figure 23 Traffic Prioritization Screen The Traffic Prioritization screen has two sections:

IP Phone Prioritization

List of Detected Phones IP Phone Prioritization Use the IP Phone Prioritization section to enable or disable traffic prioritization for NBX or other IP phones. Table 12 lists the available options for this section. CAUTION: To ensure that the Switch recognizes the NBX or other IP phone during phone initialization, do not connect any data source to the phone until the phone has finished booting up. 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 connection and use the pass-through LAN port on the IP phone. Upgrading the Firmware Table 12 IP Phone Prioritization Options Option Description Enable NBX Phone Prioritization Select to automatically detect and prioritize traffic from all NBX phones that are connected to the Switch. By default, this option is selected. Enable Phone MAC Address-based Prioritization If you are not using NBX phones and you know the Organizational Unique Identifier (OUI) for the phones, select this option, and then type the OUI in the fields provided. If this option is selected and the OUI specified, the Switch will automatically detect these phones and prioritize traffic to and from them. An OUI (sometimes called ‘vendor ID’) is the first 24 bits of a MAC address for a network-connected device (in this case, a phone), which indicate the specific vendor for that device. Disable Phone Prioritiza- Select to disable traffic prioritization tion for IP phones on the Switch If you change any of these settings, click Apply in the IP Phone Prioritization section to save your changes. List of Detected Phones This section displays the MAC addresses of IP phones that are detected and given priority by the Switch. To display a phone that is connected to a port, select the port from the drop-down list.

Upgrading the Firmware 3Com may release upgrade files for the firmware that is installed on the Switch. These firmware upgrades normally contain feature enhancements and fixes for known issues in previous releases. To upgrade the firmware, there are two tasks that you need to perform: 1 Download the firmware upgrade file from the 3Com Web site 2 Install the new firmware on the Switch Downloading Firmware Updates You can periodically check the 3Com Web site (www.3Com.com) for firmware updates to the Switch. To check for and download available firmware updates: 1 On the computer that you normally use to access the Switch’s Web interface, start the Web browser, and then enter www.3com.com in the Address or Location bar. 2 Click Support & Downloads, and then click Down- loads & Drivers. The Search for Downloads page appears. 3 In Enter a Product Number, enter 3C16475BS, and then click Quick Search. 3C16475BS is the product number for 3Com Baseline Switch 2226 Plus. The Download Search Results page displays any available download for the Switch.

4 If a firmware update is available, download the update files to the admin computer (computer that you use to access the Web interface). Installing the Firmware on the Switch After you finish downloading the upgrade files to the admin computer, you are ready to perform the firmware upgrade. To install the firmware: 1 On the admin computer, start your Web browser, and then log on to the Switch’s Web interface. 2 On the menu, click Upgrade. The Upgrade screen appears. 3 Click Yes to confirm that you want to upgrade the firmware. CAUTION: DO NOT interrupt the firmware upgrade process once it has started. The Switch prepares for the upgrade process. 4 Click Continue. 5 Click Browse. A Choose File dialog box appears. 6 Select the upgrade file that you downloaded from the 3Com Web site, and then click Open. 7 On the Firmware Upgrade screen, click Upgrade. The Switch copies the upgrade file on to itself, and then restarts. A progress bar on the Firmware Upgrade screen shows the progress of the upgrade. When the upgrade process is complete, the message Firmware Upgrade Success appears. 8 Click Continue. The Status screen appears. To verify that the upgrade was successfully completed, check if the Firmware Version number on the Status. It should show the version of the firmware that you have just installed.

TROUBLESHOOTING This chapter lists some issues that you may encounter while installing, using, and managing the Switch, with suggested courses of corrective action to take. If you encounter an issue that is not listed here and you cannot solve it, check the 3Com Knowledgebase at http://knowledgebase.3com.com before contacting your local technical support representative. For more information on how to obtain support for your Switch, refer to Appendix A. Resetting to Factory Defaults If the Switch does not operate normally or if the firmware becomes corrupted, you can reset the Switch to its factory defaults. CAUTION: Resetting the Switch to its factory defaults erases all your settings. You will need to reconfigure the Switch after you reset it. To reset the Switch to its factory defaults: 1 Using the tip of a pen (or a similar object), press the Recovery button on the rear panel of the Switch. See Figure 1 for illustration. 2 Power off the Switch, and then power it back on, while keeping the Recovery button pressed. 3 Release the Recovery button. 4 Reset the Switch either by:

Accessing the Web interface using Discovery, and then pressing the RESET button on the Fail-Safe Mode screen (see Figure 24). The Fail-Safe Mode screen appears (instead of the logon screen) after you perform steps 1 to 3 of this procedure.

Powering off the Switch, and then powering it back on. The Switch will perform automatic IP configuration after you reset it. See “Automatic IP Configuration” on page 29 for more information. Figure 24 Fail-Safe Mode Screen

Forgotten Password If you forget the password to the Web interface after you set it, you will need to reset the Switch to regain access. See “Resetting to Factory Defaults” on page 43 for instructions. After resetting the Switch, you can log on to the Web interface again using the default admin account settings:

Password – blank (no password) Forgotten Static IP Address A link is connected, but the Link/Activity LED for the port is off. There is a problem with this connection. Verify that:

The device being connected to is powered on and operating correctly.

The cable is connected at both ends.

The cable is not damaged.

If the connection is to a workstation, that the workstation's network interface is installed and configured correctly.

The correct category of cable is being used for the required link speed. Category 3 cables can be used for 10BASE-T operation only. Category 5 cable is required for 100BASE-TX or 1000BASE-T. 3Com recommends Category 5e or 6 cables for 1000BASE-T operation. If you forget the static IP address that you assigned to the Switch and you need to access the Web interface, use the Discovery application to automatically detect the IP address and connect to the interface. For information on using the Discovery application, refer to “Running the Discovery Application” on page 21. A fiber cable is connected, but the Module Active LED is off. Verify that: Solving LED Issues This section lists some issues that are related to the LEDs on the front panel of the Switch. For information on basic LED checks, refer to the following topics in Chapter 1:

(3) Link/Activity LEDs

The fiber cable is in good condition.

A 3Com SFP module is being used. Refer to “Approved SFP Transceivers” on page 18 for details.

The equipment at the far end is installed and correctly configured. The Link/Activity LED is on, but network performance is poor . Solving Corrupted Firmware

The Switch supports full-duplex autonegotiation. If the connected device does not support autonegotiation, ensure that it is configured for half-duplex operation only. If the connected device has autonegotiation disabled or overridden, and is configured as full-duplex, the Switch will configure the link as half-duplex, causing a mismatch that will reduce network performance when data is transmitting and receiving simultaneously on the same link. 1 Download the latest firmware from the 3Com Web Ensure that the connected device has either: 3 Click Browse, and then follow the onscreen instruc-

The ports are configured for half-duplex operation All ports appear to show continual activity. There may be broadcast storms on the network. Remove port connections one at a time, waiting a few seconds between each port. If the LEDs go off after removing a port connection, the device that was connected to that port is introducing an excessive amount of broadcast frames to the network. Some pieces of network equipment operate by sending out broadcast frames regularly. Refer to the documentation that accompanies the device for information on disabling the broadcast operation. When the firmware is corrupted, the Switch automatically goes into Fail-Safe mode. To upgrade a corrupted firmware: site to the computer that you are using to access the Web interface. 2 Access the Web interface. The Fail-Safe Mode screen appears, as shown in Figure 24. tions to upgrade the Switch to the required version of firmware. To reset the Switch to its factory defaults, follow the instructions in “Resetting to Factory Defaults” on page 43. CAUTION: Before recovering the Switch, save the Switch’s current configuration. Recovering the Switch will cause the current configuration to be lost. If the Problem Persists If the problem persists and the unit still does not operate successfully, contact your 3Com network supplier with the following information before returning the unit:

Product number and serial number (printed on a label supplied with the unit).

A brief description of the issue Solving Corrupted Firmware If the firmware becomes corrupted, you must either:

Upgrade the firmware for the Switch

OBTAINING SUPPORT FOR YOUR PRODUCT

Register Your Product Warranty and other service benefits start from the date of purchase, so it is important to register your product quickly to ensure you get full use of the warranty and other service benefits available to you. Warranty and other service benefits are enabled through product registration. Register your product at http://eSupport.3com.com/. 3Com eSupport services are based on accounts that you create or have authorization to access. First time users must apply for a user name and password that provides access to a number of eSupport features including Product Registration, Repair Services, and Service Request. If you have trouble registering your product, please contact 3Com Global Services for assistance. projects. More information on 3Com maintenance and Professional Services is available at http://www.3com.com/ Contact your authorized 3Com reseller or 3Com for a complete list of the value-added services available in your area. Troubleshoot Online You will find support tools posted on the 3Com web site at http://www.3com.com/ 3Com Knowledgebase helps you troubleshoot 3Com products. This query-based interactive tool is located at http://knowledgebase.3com.com and contains thousands of technical solutions written by 3Com support engineers. Purchase Value-Added Services To enhance response times or extend warranty benefits, contact 3Com or your authorized 3Com reseller. Value-added services like 3Com ExpressSM and GuardianSM can include 24x7 telephone technical support, software upgrades, onsite assistance or advance hardware replacement. Experienced engineers are available to manage your installation with minimal disruption to your network. Expert assessment and implementation services are offered to fill resource gaps and ensure the success of your networking Access Software Downloads Software Updates are the bug fix / maintenance releases for the version of software initially purchased with the product. In order to access these Software Updates you must first register your product on the 3Com web site at http://eSupport.3com.com/. First time users will need to apply for a user name and password. A link to software downloads can be

APPENDIX A: OBTAINING SUPPORT FOR YOUR PRODUCT found at http://eSupport.3com.com/, or under the Product Support heading at http://www.3com.com/ Software Upgrades are the software releases that follow the software version included with your original product. In order to access upgrades and related documentation you must first purchase a service contract from 3Com or your reseller. To send a product directly to 3Com for repair, you must first obtain a return authorization number (RMA). Products sent to 3Com, without authorization numbers clearly marked on the outside of the package, will be returned to the sender unopened, at the sender’s expense. If your product is registered and under warranty, you can obtain an RMA number online at http://eSupport.3com.com/. First time users will need to apply for a user name and password. Telephone Technical Support and Repair To obtain telephone support as part of your warranty and other service benefits, you must first register your product at http://eSupport.3com.com/ Warranty and other service benefits start from the date of purchase, so it is important to register your product quickly to ensure you get full use of the warranty and other service benefits available to you. When you contact 3Com for assistance, please have the following information ready:

Product model name, part number, and serial number

Proof of purchase, if you have not pre-registered your product

A list of system hardware and software, including revision level

Details about recent configuration changes, if applicable Contact Us 3Com offers telephone, e-mail and internet access to technical support and repair services. To access these services for your region, use the appropriate telephone number, URL or e-mail address from the list below. Telephone numbers are correct at the time of publication. Find a current directory of support telephone numbers posted on the 3Com web site at http://csoweb4.3com.com/contactus/ Contact Us

Country Telephone Number Asia, Pacific Rim Telephone Technical Support and Repair Australia Hong Kong India Indonesia Japan Malaysia New Zealand Pakistan Philippines P.R. of China Singapore S. Korea Taiwan Thailand

You can also obtain support in this region using the following e-mail: apr_technical_support@3com.com Country Telephone Number Austria Belgium Denmark Finland France Germany Hungary Ireland Israel Italy Luxembourg Netherlands Norway Poland Portugal South Africa Spain Sweden Switzerland U.K.

You can also obtain support in this region using the following URL: http://emea.3com.com/support/email.html Or request a repair authorization number (RMA) by fax using this number: +65 543 6348 Country Europe, Middle East, and Africa Telephone Technical Support and Repair From the Caribbean, Central and South America, call: From anywhere in these regions, call: +44 (0)1442 435529 From the following countries, you may use the numbers shown:

Telephone Number Latin America Telephone Technical Support and Repair

You can also obtain support in this region using the following: Spanish speakers, enter the URL: http://lat.3com.com/lat/support/form.html Portuguese speakers, enter the URL: http://lat.3com.com/br/support/form.html English speakers in Latin America should send e-mail to: lat_support_anc@3com.com US and Canada Telephone Technical Support and Repair

WARNING: France and Peru only

Important Safety Information This unit cannot be powered from IT† supplies. If your supplies are of IT type, this unit must be powered by 230 V (2P+T) via an isolation transformer ratio 1:1, with the secondary connection point labelled Neutral, connected directly to earth (ground). Please read the following safety information carefully before installing the 3Com Baseline Switch 2226 Plus.

WARNING: Installation and removal of the unit must

be carried out by qualified personnel only.

WARNING: If installing the Switch unit in a stack with

other units, the Switch unit must be installed below the narrower units and above the deeper units.

WARNING: The unit must be earthed (grounded) to

ensure compliance with safety standards.

WARNING: Power cord set

This must be approved for the country where it will be used. U.S.A. and Canada

WARNING: The appliance coupler (the connector to

the unit and not the wall plug) must have a configuration for mating with an EN60320/IEC320 appliance inlet.

WARNING: The socket outlet must be near to the

unit and easily accessible. You can only remove power from the unit by disconnecting the power cord from the outlet.

WARNING: This unit operates under SELV (Safety

Extra Low Voltage) conditions according to IEC 60. The conditions are only maintained if the equipment to which it is connected also operates under SELV conditions.

The cord set must be UL-approved and CSA certified.

The minimum specifications for the flexible cord are: No. 18 AWG Type SV or SJ 3-conductor

The cord set must have a rated current capacity of at least 10 A.

The attachment plug must be an earth-grounding type with a NEMA 5-15P (15 A, 125 V) or NEMA 6-15P (15 A, 250 V) configuration. Denmark The supply plug must comply with Section 107-2-D1, Standard DK2-1a or DK2-5a. Switzerland The supply plug must comply with SEV/ASE 1011.

The supply plug must comply with BS1363 (3-pin 13-amp) and be fitted with a 5 A fuse which complies with BS1362.

The mains cord must be <HAR> or <BASEC> marked and be of type HO3VVF3GO.75 (minimum).

The supply plug must comply with CEE7/7 (“SCHUKO”)

The mains cord must be <HAR> or <BASEC> marked and be of type HO3VVF3GO.75 (minimum).

WARNING: Fiber optic ports – optical safety

Never look at the transmit laser while it is powered on. Never look directly at the fiber ports and fiber cable ends when they are powered on.

WARNING: Use of controls or adjustments of performance or procedures other than those specified

herein may result in hazardous laser emissions. Consignes Importantes de Sécurité Veuillez lire à fond l'information de la sécurité suivante avant d'installer le Baseline Switch 2226 Plus.

TECHNICAL INFORMATION Physical Related Standards The 3Com Baseline Switch 2226 Plus has been designed to the following standards: Functional ISO 8802-3, IEEE 802.3 (Ethernet), IEEE 802.3u (Fast Ethernet), IEEE 802.3ab and IEEE 802.3z (Gigabit Ethernet), IEEE 802.3x (Flow Control), IEEE 802.1D 1998 (Bridging) MAC Address

Mounting Free-standing, or 19 in. rack-mounted using the supplied mounting kit Electrical Power Inlet IEC 320 AC Line Frequency 50/60 Hz Input Voltage 100–240 VAC Current Rating 1 ampere (maximum) Maximum Power Consumption 196 watts Maximum Power Dissipation

GLOSSARY 10BASE-T The IEEE specification for 10 Mbps Ethernet over Category 3, 4 or 5 twisted pair cable. 100BASE-TX The IEEE specification for 100 Mbps Fast Ethernet over Category 5 twisted-pair cable. 1000BASE-LX IEEE 802.3z specification for Gigabit Ethernet over 9/125 micron core single-mode fiber cable. 1000BASE-SX IEEE 802.3z specification for Gigabit Ethernet over two strands of 50/125 or 62.5/125 micron core multimode fiber cable. 1000BASE-T IEEE 802.3ab specification for Gigabit Ethernet over 100-ohm Category 5, 5e or 6 twisted-pair cable (using all four wire pairs). autonegotiation Autonegotiation is where two devices sharing a link, automatically configure to use the best common speed. The order of preference (best first) is: 1000BASE-T full-duplex, 100BASE-TX full-duplex, 100BASE-TX half-duplex, 10BASE-T full-duplex, and 10BASE-T half-duplex. Autonegotiation is defined in the IEEE 802.3 standard for Ethernet and is an operation that takes place in a few milliseconds. Autonegotiation must be enabled for the 1000BASE-T ports to operate at 1000 Mbps, full-duplex. bandwidth The information capacity (measured in bits per second) that a channel can transmit. The bandwidth of Ethernet is 10 Mbps, the bandwidth of Fast Ethernet is 100 Mbps and Gigabit Ethernet is 1000 Mbps. category 3 cable One of five grades of Twisted Pair (TP) cabling defined by the EIA/TIA-568 standard. Category 3 is voice grade cable and can only be used in Ethernet networks (10BASE-T) to transmit data at speeds of up to 10 Mbps. category 5 cable One of five grades of Twisted Pair (TP) cabling defined by the EIA/TIA-568 standard. Category 5 can be used in Ethernet (10BASE-T) and Fast Ethernet networks (100BASE-TX) and can transmit data at speeds of up to 100 Mbps. Category 5 cabling is better to use for network cabling than Category 3, because it supports both Ethernet (10 Mbps) and Fast Ethernet (100 Mbps) speeds.

GLOSSARY category 5e cables One of five grades of Twisted Pair (TP) cabling defined by the EIA/TIA-568 standard. Category 5e can be used in Ethernet (10BASE-T), Fast Ethernet (100BASE-TX) and Gigabit Ethernet (1000BASE-T) networks, and can transmit data at speeds of up to 1000 Mbps. Ethernet address See MAC address. Fast Ethernet An Ethernet system that is designed to operate at 100 Mbps. Gigabit Ethernet category 6 cable One of five grades of Twisted Pair (TP) cabling defined by the EIA/TIA-568-B standard. Category 6 can be used in Ethernet (10BASE-T), Fast Ethernet (100BASE-TX) and Gigabit Ethernet (1000BASE-T) networks, and can transmit data at speeds of up to 1000 Mbps. client An Ethernet system that is designed to operate at 1000 Mbps. full-duplex A system that allows packets to be transmitted and received at the same time and, in effect, doubles the potential throughput of a link. half-duplex The term used to describe the desktop PC that is connected to your network. A system that allows packets to be transmitted and received, but not at the same time. Half-duplex is not supported for 1000 Mbps. Contrast with full-duplex. DHCP Dynamic Host Configuration Protocol. This protocol automatically assigns an IP address for every computer on your network. Windows 95, Windows 98 and Windows NT 4.0 contain software that assigns IP addresses to workstations on a network. These assignments are made by the DHCP server software that runs on Windows NT Server. Ethernet A LAN specification developed jointly by Xerox, Intel and Digital Equipment Corporation. Ethernet networks use CSMA/CD to transmit packets at a rate of 10 Mbps and 100 Mbps over a variety of cables. IEEE Institute of Electrical and Electronics Engineers. This American organization was founded in 1963 and sets standards for computers and communications. IEEE 802.1D Specifies a general method for the operation of MAC bridges, including the Spanning Tree Protocol. IEEE 802.1Q VLAN Tagging - Defines Ethernet frame tags that carry VLAN information. It allows switches to assign endstations to different virtual LANs, and defines a GLOSSARY

address is written as four octets separated with periods (full-stops), and is made up of a network section, an optional subnet section and a host section. standard way for VLANs to communicate across switched networks. IEEE 802.1p An IEEE standard for providing quality of service (QoS) in Ethernet networks. The standard uses packet tags that define up to eight traffic classes and allows switches to transmit packets based on the tagged priority value. LAN Local Area Network. A network of end stations (such as PCs, printers, servers) and network devices (hubs and switches) that cover a relatively small geographic area (usually not larger than a floor or building). LANs are characterized by high transmission speeds over short distances (up to 1000 meters). IEEE 802.3ad A standard that defines link aggregation. 802.3ad is now incorporated into the relevant sections of the IEEE Std. 802.3-2002. Layer 2 Internet Engineering Task Force. An organization responsible for providing engineering solutions for TCP/IP networks. In the network management area, this group is responsible for the development of the SNMP protocol. link aggregation Data Link layer in the ISO 7-Layer Data Communications Protocol. This is related directly to the hardware interface for the network devices and passes on traffic based on MAC addresses. IETF See Trunking. MAC

Internet Protocol. IP is a layer 3 network protocol that is the standard for sending data through a network. IP is part of the TCP/IP set of protocols that describe the routing of packets to addressed devices. An IP address consists of 32 bits divided into two or three fields: a network number and a host number or a network number, a subnet number, and a host number. IP Address Internet Protocol Address. A unique identifier for a device attached to a network using TCP/IP. The Media Access Control. A protocol specified by the IEEE for determining which devices have access to a network at any one time. MAC address Media Access Control Address. Also called the hardware, physical, or Ethernet address. A layer 2 address associated with a particular network device. Most devices that connect to a LAN have a MAC address assigned to them as they are used to identify other devices in a network. MAC addresses are 6 bytes long.

GLOSSARY network A network is a collection of computers and other computer equipment that are connected for the purpose of exchanging information or sharing resources. Networks vary in size, some are within a single room, others span continents. subnet address An extension of the IP addressing scheme that allows a site to use a single IP network address for multiple physical networks. subnet mask A subnet mask, which may be a part of the TCP/IP information provided by your ISP, is a set of four numbers configured like an IP address. It is used to create IP address numbers used only within a particular network (as opposed to valid IP address numbers recognized by the Internet, which must assigned by InterNIC). ping Packet Internet Groper. An internet utility used to determine whether a particular IP address is online. It is used to test and debug a network by sending out a packet and waiting for a response. protocol A set of rules for communication between devices on a network. The rules dictate format, timing, sequencing and error control. subnet A network that is a component of a larger network. switch RJ-45 A device that interconnects several LANs to form a single logical LAN that comprises of several LAN segments. Switches are similar to bridges, in that they connect LANs of a different type; however they connect more LANs than a bridge and are generally more sophisticated. A standard connector used to connect Ethernet networks. The “RJ” stands for “registered jack.” server A computer in a network that is shared by multiple end stations. Servers provide end stations with access to shared network services such as computer files and printer queues. SFP Small Form Factor Pluggable (SFP) Connectors are based on an open standard that enables hot swapping of various types of fiber optic and copper-based transceivers into the host equipment. TCP/IP Transmission Control Protocol/Internet Protocol. This is the name for two of the most well-known protocols developed for the interconnection of networks. Originally a UNIX standard, TCP/IP is now supported on almost all platforms, and is the protocol of the Internet. GLOSSARY TCP relates to the content of the data travelling through a network — ensuring that the information sent arrives in one piece when it reaches its destination. IP relates to the address of the end station to which data is being sent, as well as the address of the destination network. traffic monitoring Enables the monitoring of port traffic by attaching a network analyzer to one switch port, in order to monitor the traffic of other ports on the Switch. trunking A method that specifies how to combine several lower-speed physical links to create a single high-speed logical link. VLAN Virtual LAN. A collection of network nodes that share the same collision domain regardless of their physical location or connection point in the network. A VLAN serves as a logical workgroup with no physical barriers, and allows users to share information and resources as though located on the same LAN.

fail-safe mode 43, 45 Fast Ethernet 62 flow control 33 forgotten IP address 44 forgotten password 44 free-standing 14 front panel Duplex LEDs 12 Link/Activity LEDs 10 Module Active LEDs 10 Power LED 11 RJ-45 ports 9 self-adhesive pads 12 SFP ports 11 full-duplex 62 LAN defined 63 LED issues 44 LEDs Duplex 12 Link/Activity 10 Module Active 10 Power 11 link aggregation 36 local area network 63

MAC address 63 media access control 63 monitoring traffic 39 mounting kit contents 13 using 15 Gigabit Ethernet 62

package contents 12 panels front 9 rear 12 password changing 28 default (blank) 28 setting 28 physical features 9 port settings configuring 31 default settings 31 flow control 33 modifying individual ports 32 speed/duplex 33 viewing 31 ports RJ-45 9 SFP 8, 11 positioning 13 POST 17 powering on 16 power-on self-test See POST prioritization IP phones 40 protocol defined 64 server defined 64 SFP ports 8, 11 SFP transceivers 18 approved (supported) 18 inserting 18 removing 19 speed/duplex 33 spot checks 19 subnet mask 64 switch defined 64

TCP/IP 63 defined 64 traffic 65 monitoring 39 setting the priority 40 traffic prioritization 8, 40 IP phones 8 priority queuing 8 traffic priority levels 8 troubleshooting 43 corrupted firmware 45 forgotten IP address 44 forgotten password 44 LED-related issues 44 POST failed 17 trunking See link aggregation

rack-mounting 14 rear panel power supply 12 Recovery button 12 resetting to factory defaults 43 RJ-45 defined 64 ports 9

safety information German 54

user name default 28

viewing detected IP phones 41 individual port statistics 38 port settings 31 statistics 38 status information 27 VLANs 33 creating 34, 36 desktop 34 maximum supported 33 not a member 34 removing 36 sample configurations 35 uplink 34

Web interface accessing directly 24 accessing using Discovery 21 buttons 24 connecting 21 logging on 22 menu 23 navigating 23 requirements for accessing 21 REGULATORY NOTICES FCC STATEMENT This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference to radio communications, in which case the user will be required to correct the interference at their own expense.

INFORMATION TO THE USER

If this equipment does cause interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

Reorient the receiving antenna.

Relocate the equipment with respect to the receiver.

Move the equipment away from the receiver.

Plug the equipment into a different outlet so that equipment and receiver are on different branch circuits. If necessary, the user should consult the dealer or an experienced radio/television technician for additional suggestions. The user may find the following booklet prepared by the Federal Communications Commission helpful: How to Identify and Resolve Radio-TV Interference Problems This booklet is available from the U.S. Government Printing Office, Washington, DC 20402, Stock No. 004-000-00345-4. In order to meet FCC emissions limits, this equipment must be used only with cables which comply with IEEE 802.3. CE STATEMENT (EUROPE) This product complies with the European Low Voltage Directive 73/23/EEC and EMC Directive 89/336/EEC as amended by European Directive 93/68/EEC/. CSA STATEMENT This Class A digital apparatus meets all requirements of the Canadian Interference-Causing Equipment Regulations. Cet appareil numérique de la classe A respecte toutes les exigences du Règlement sur le matériel brouilleur du Canada. VCCI STATEMENT