Baseline Switch 2250 Plus (3C16476BS) User Guide http://www.3com.com/ Part No.
3Com Corporation • 350 Campus Drive • Marlborough • MA USA 01752-3064 Copyright © 2004, 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.
CONTENTS Supplying Power to the Switch 16 Checking for Correct Operation 16 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 ABOUT THIS GUIDE Conventions 5 Related Documentation 6 Documentation Comments 6 1 INTRODUCING THE BASELINE SWITCH Overview of the Baseline Switch 2250 Plus 7 Features and Capabilities 7 Autosensing of MDI/MDIX Connections 7 Autonegotiating 10/100 Mbps Ports
Setting the IP Address 30 Configuring Port Settings 31 Basic Port Configuration 31 Advanced Port Configuration 32 Default Port Settings 32 Configuring VLANs 32 Creating a VLAN 33 Deleting VLANs 33 Modifying VLANs 34 Defining VLAN Membership 34 Sample VLAN Configurations 34 Configuring Trunking 36 Guidelines for Creating Trunks 36 Creating, Modifying, and Deleting Trunks 37 Defining Trunk Membership 37 Viewing Trunk Information 37 Monitoring Traffic 38 Using the System Tools 39 Restarting the Switch 39 Reset
ABOUT THIS GUIDE This guide is intended for use by network administators 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.
ABOUT THIS GUIDE Related Documentation In addition to this guide, each 3Com Baseline Switch 2250 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.
1 INTRODUCING THE BASELINE SWITCH This chapter provides an overview of the features and capabilities of the 3Com® Baseline Switch 2250 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 2250 Plus The 3Com® Baseline Switch 2250 Plus is a versatile, easy-to-use unmanaged switch.
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.
Physical Features able communication paths between switches and to determine the best available path and block less optimal paths. For information on configuring BPDU forwarding and blocking, refer to “Configuring the Spanning Tree” on page 41. 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.
CHAPTER 1: INTRODUCING THE BASELINE SWITCH Entweder geschützte oder ungeschützte Buchsen dürfen an diese Datensteckdosen angeschlossen werden. The Switch has 48 10/100 Mbps autonegotiating ports (ports 1 to 48). Their speed and duplex mode (half-duplex or full-duplex) are automatically determined by the capabilities of the connected device. Each port also supports automatic MDI/MDI-X detection and can be connected to either a 10BASE-T, or a 100BASE-TX device.
Physical Features 11 Status Meaning Status Meaning Flashing Packets are being received or transmitted on the port Flashing Yellow to Green Port disabled or link loopback error Off Link not established, either nothing is connected to the port, or there is a problem. Off Link not established, either nothing is connected to the port, or there is a problem.
CHAPTER 1: INTRODUCING THE BASELINE SWITCH 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. If this occurs, reset the Switch to factory defaults. Refer to “Resetting to Factory Defaults” (6) Self-Adhesive Pads The unit is supplied with four self-adhesive rubber pads.
2 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 ■ Connecting a Network Device ■ Performing Spot Checks Before You Begin WARNING: Safety Information.
CHAPTER 2: INSTALLING THE SWITCH mends that you provide a minimum of 25 mm or 1 in. clearance). 3Com empfiehlt das Sie 25mm (1 Inch) Zwischenraum sicherstellen. ■ The air is as free of dust as possible. ■ Die Luft so frei wie möglich von Staub ist. ■ Temperature operating limits are not likely to be exceeded. It is recommended that the unit is installed in a clean, air conditioned environment. ■ Es unwahrscheinlich ist das die Betriebstemperatur überschritten wird.
Rack-Mounting or Free-Standing 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 15 Montagesatz Anweisungen Der Switch wird mit zwei Halterungen und vier Schrauben geliefert.
CHAPTER 2: INSTALLING THE SWITCH mixing a variety of Baseline and SuperStack units, the smaller units must be positioned at the top. If you are placing Switch units one on top of the other, you must use the self-adhesive rubber pads supplied. Apply the pads to the underside of each Switch, sticking one in the marked area at each corner. Place the Switch units on top of each other, ensuring that the pads of the upper unit line up with the recesses of the lower unit.
Connecting a Network Device Color State Yellow Power-on self-test or loopback test failed. This can happen if a ports or ports fail when the Switch was powered on. Off The unit is not receiving power: ■ ■ 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.
CHAPTER 2: INSTALLING THE SWITCH fiber-optic cable or to multimode fiber using a conditioned launch cable. Using SFP Transceivers The following sections describe how to insert and remove an SFP transceiver from an SFP slot. If the SFP transceiver is faulty, it will not operate within the Switch. See “Troubleshooting” on page 43. 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.
Performing Spot Checks 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. 6 Connect the other end of the cable to a device fitted with an appropriate Gigabit Ethernet connection.
CHAPTER 2: INSTALLING THE SWITCH
3 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 application.
CHAPTER 3: CONNECTING TO THE WEB INTERFACE 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.
Navigating the Web Interface Figure 7 Logon Dialog Box 23 Figure 8 Switch Screen Layout Buttons To log on to the Web interface: 1 In User name, type admin. 2 Leave the Password field blank. 3 Click OK. 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 Table 8 lists the available items on the menu.
CHAPTER 3: CONNECTING TO THE WEB INTERFACE Menu Item Description Port Configuration Allows you to configure the Switch’s port settings VLANs Allows you to create VLAN groups, add port members, and specify how VLAN tagging is used Trunking Allows you to set up and maintain trunk membership for port groups Traffic Monitoring Allows you to perform port traffic monitoring on the Switch. To monitor a port, you will also need a network analyzer.
Accessing the Interface Without Using Discovery 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. 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.
CHAPTER 3: CONNECTING TO THE WEB INTERFACE
4 CONFIGURING THE SWITCH This chapter provides information on how to configure the Switch’s advanced features.
CHAPTER 4: CONFIGURING THE SWITCH Figure 9 Top Half of the Summary Screen 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. 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.
Modifying the IP Address Settings 4 In Confirm Password, retype the password you typed in step 3 to confirm. 29 the sticker on the base of the Switch. This sticker contains the MAC address and default IP address of the Switch. The password is case-sensitive. 5 Click Apply. If you want to modify the admin password later on, follow the same procedure.
CHAPTER 4: CONFIGURING THE SWITCH Setting the IP Address To set the IP address for the Switch: 1 Click IP Settings on the menu. The IP Settings screen Table 9 IP Setting Options Option Description IP Address Mode appears. Specify how the Switch will get its IP address.
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 view the current connection status of each port or shut down or disable ports.
CHAPTER 4: CONFIGURING THE SWITCH Switch will automatically connect at 1000Mbps, providing the connected device also supports this speed. 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.
Configuring VLANs networks. This also provides for a more secure and cleaner network environment. You can create up to 256 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. 33 For examples on setting up VLANs, refer to “Sample VLAN Configurations”.
CHAPTER 4: CONFIGURING THE SWITCH Modifying VLANs Use the Modify VLAN screen to change the VLAN to which a port belongs, and configure the port to communicate with all other VLANs, or a selected VLAN. ■ Desktop - If you select this, the port can only communicate with other ports assigned to the VLAN selected in the VLAN ID drop-down list. An uplink port is sometimes referred to as a tagged port. The two terms refer to the same feature.
Configuring VLANs Setting Up Two VLANs on the Same Switch Figure 18 illustrates how you can set up a simple VLAN on the Switch using desktop connections.
CHAPTER 4: CONFIGURING THE SWITCH Figure 19 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.
Configuring Trunking ■ All ports in a trunk must be configured in an identical manner, including communication mode (that is, speed, duplex mode and flow control). 37 Figure 21 Membership Screen Creating, Modifying, and Deleting Trunks Use the Modify/Delete tabe under Trunking to create, configure or remove ports groups from trunks. Figure 20 Modify/Delete Screen ■ Trunk Number – Displays the number of the trunk. ■ Name – Allows you to label an interface.
CHAPTER 4: CONFIGURING THE SWITCH Figure 22 Summary Screen To set up traffic monitoring for a port: 1 Connect a network analyzer to a port. 2 Access the Web interface, and then click Traffic Mon- itoring on the menu. The Port Traffic Monitoring Screen appears. 3 On the Monitor Port menu, select the port number that you want to monitor. 4 On the Analyzer Port menu, select the port number to Monitoring Traffic The Switch allows you to monitor traffic going in and out of a particular port.
Using the System Tools For information on how to interpret the output on the port analyzer, refer to its accompanying documentation. Using the System Tools The System Tools menu includes five administration items: ■ Restart ■ Configuration ■ Upgrade ■ Spanning Tree ■ 802.
CHAPTER 4: CONFIGURING THE SWITCH ■ To reload configuration settings that you previously saved to a file, scroll down the page, and then click Browse to locate the backup file on your computer, and then RESTORE to copy the configuration back to the Switch. Figure 26 Upgrade Screen For security purposes, restoring the configuration does not change the password. ■ If you want to reset the settings on your Switch to those that were loaded at the factory, click RESET.
Using the System Tools CAUTION: Do not interrupt power to the Switch during the upgrade procedure. If you do, the software may be corrupted and the Switch may not start up properly afterwards. Configuring the Spanning Tree This administrative tool supports the configuration of the Switch to forward, or block and discard 802.1D spanning tree BPDU packets. Spanning tree is a bridge-based system for providing fault tolerance on networks and can be used to detect and disable network loops.
CHAPTER 4: CONFIGURING THE SWITCH been priority encoded, then the Switch will read the priority level and determine whether the packet should be directed through the normal or high priority channel. This feature can be useful for example during excessive loads when one type of traffic may require priority over another. The Switch is configured to comply with 802.1p, VLAN tagged frames.
5 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.
CHAPTER 5: TROUBLESHOOTING access. See “Resetting to Factory Defaults” on page 43 for instructions. After resetting the Switch, log on to the Web interface using the default admin account settings: ■ User name – admin ■ Password – blank (no password) Forgotten Static IP Address 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.
If the Problem Persists 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.
CHAPTER 5: TROUBLESHOOTING
A 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.
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).
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.
APPENDIX A: OBTAINING SUPPORT FOR YOUR PRODUCT Country Telephone Number Country Telephone Number Antigua Argentina Aruba Bahamas Barbados Belize Bermuda Bonaire Brazil Cayman Chile Colombia Costa Rica Curacao Ecuador Dominican Republic Guatemala Haiti Honduras Jamaica Martinique Mexico Nicaragua Panama Paraguay Peru Puerto Rico Salvador Trinidad and Tobago Uruguay Venezuela Virgin Islands 1 800 988 2112 0 810 444 3COM 1 800 998 2112 1 800 998 2112 1 800 998 2112 52 5 201 0010 1 800 998 2112 1 800
B SAFETY INFORMATION which it is connected also operates under SELV conditions. Important Safety Information Please read the following safety information carefully before installing the 3Com Baseline Switch 2250 Plus. France and Peru Only 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).
APPENDIX B: SAFETY INFORMATION Power Cord Set WARNING: Fiber Optic Ports – Optical Safety This must be approved for the country where it will be used. U.S.A. and Canada ■ 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.
Consignes Importantes de Sécurité ■ ■ La prise secteur doit se trouver à proximité de l’appareil et son accès doit être facile. Vous ne pouvez mettre l’appareil hors circuit qu’en débranchant son cordon électrique au niveau de cette prise. Cordon électrique Il doit être agréé dans le pays d’utilisation. Etats-Unis et Canada: L’appareil fonctionne à une tension extrêmement basse de sécurité qui est conforme à la norme IEC60950.
APPENDIX B: SAFETY INFORMATION AVERTISSEMENT: Ports pour fibres optiques – sécurité sur le plan optique ■ Das Gerät muß an eine geerdete Steckdose angeschlossen werden, welche die internationalen Sicherheitsnormen erfüllt. ■ Ne regardez jamais le laser tant qu'il est sous tension. Ne regardez jamais directement le port à fibres optiques et les embouts de câbles à fibres optiques tant qu'ils sont sous tension.
Wichtige Sicherheitshinweise Informationen WARNUNG: Die Installation und der Ausbau des Geräts darf nur durch Fachpersonal erfolgen. Niemals ein Übertragungslaser betrachten, während dieses eingeschaltet ist. Niemals direkt auf die Faseransnchlüsse und auf die Faserkabelenden schauen, während diese eingeschaltet sind. WARNUNG: Die Verwendung von Steuerelementen oder die Anpassung von Leistungen und Verfahren in anderer als der hierin genannten Weise kann zu gefährlichen Laseremissionen führen.
APPENDIX B: SAFETY INFORMATION
C TECHNICAL INFORMATION Physical Related Standards The 3Com Baseline Switch 2250 Plus has been designed to the following standards: Functional ISO 8802-3, IEEE 802.3 (Ethernet), IEEE 802.3u (Fast Ethernet), IEEE 802.3ab (Gigabit Ethernet), IEEE 802.3x (Flow Control), IEEE 802.
APPENDIX C: TECHNICAL INFORMATION
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.
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.
GLOSSARY 61 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.
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.
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.
GLOSSARY
INDEX Numbers E L 1000BASE-LX 59 1000BASE-SX 59 1000BASE-T 59 100BASE-TX 59 10BASE-T 59 Ethernet 60 LAN defined 61 LED issues 44 LEDs Link/Activity 10 Module Active 11 Power 11 link aggregation 36 local area network 61 A auto IP configuration 29 default IP address 29 default mask 29 autonegotiation 7 autosensing 7 B F Fast Ethernet 60 forgotten IP address 43 forgotten password 43 free-standing 14 front panel Link/Activity LEDs 10 Module Active LEDs 11 Power LED 11 RJ-45 ports 11 self-adhesive pads
INDEX changing 28 default (blank) 28 setting 28 physical features 9 port settings configuring 31 default settings 32 ports RJ-45 11 SFP 8, 10 positioning 13 POST 16 powering on 16 power-on self-test See POST protocol defined 62 R rack-mounting 14 rear panel power supply 12 Recovery button 12 resetting to factory defaults 43 RJ-45 defined 62 ports 11 S server defined 62 SFP ports 8, 10 SFP transceivers 18 approved (supported) 18 inserting 18 removing 19 spot checks 19 subnet mask 62 switch defined 62
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.
