Page 3 - ONTENTS
C ONTENTS A BOUT T HIS G UIDE Conventions 5 Related Documentation 6 Documentation Comments 6 1 I NTRODUCING THE B ASELINE S WITCH Overview of the Baseline Switch 2250 Plus 7 Features and Capabilities 7 Autosensing of MDI/MDIX Connections 7 Autonegotiating 10/100 Mbps Ports 7 SFP Ports 8 Traffic Prio...
Page 5 - Conventions; Table 1
A BOUT T HIS G UIDE This guide is intended for use by network administa-tors 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 vorg...
Page 6 - Related Documentation; Document title
6 A BOUT T HIS G UIDE 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...
Page 7 - Baseline Switch 2250 Plus.; Overview of the Baseline Switch 2250 Plus; Autosensing of MDI/MDIX Connections
1 I NTRODUCING THE B ASELINE S WITCH 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 P...
Page 8 - SFP Ports; Table 3; Forwarding of BPDU Packets; Priority Level
8 C HAPTER 1: I NTRODUCING THE B ASELINE S WITCH 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 cor...
Page 9 - “Configuring the Spanning Tree”; Physical Features; Figure 1; Front Panel
Physical Features 9 able communication paths between switches and to determine the best available path and block less opti-mal 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...
Page 10 - “Troubleshooting”; Table 4
10 C HAPTER 1: I NTRODUCING THE B ASELINE S WITCH Entweder geschützte oder ungeschützte Buchsen dürfen an diese Datensteckdosen angeschlossen wer-den. 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 deter...
Page 11 - The Power LED shows the power status of the Switch.
Physical Features 11 Table 5 10BASE-T/100BASE-TX/1000BASE-T Ports (4) Module Active LEDs The Module Active LEDs show the status of any SFP modules that are installed. (5) Power LED The Power LED shows the power status of the Switch. Flashing Packets are being received or transmit-ted on the port Off...
Page 12 - Rear Panel; “Resetting to Factory Defaults”; Package Contents; User Guide; “Resetting to Factory
12 C HAPTER 1: I NTRODUCING THE B ASELINE S WITCH (6) Self-Adhesive Pads The unit is supplied with four self-adhesive rubber pads. Do not apply the pads if you intend to rack-mount the unit. If the unit is to be part of a free-standing stack, apply the pads to each marked corner area on the under-si...
Page 13 - Before You Begin; Before installing or; Positioning the Switch; It is accessible and cables can be connected easily.
2 I NSTALLING THE S WITCH 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 ■ Performi...
Page 14 - The air is as free of dust as possible.; Aufstellen des Switch; Die Luft so frei wie möglich von Staub ist.; Using the Mounting Kit; “Positioning the Switch”
14 C HAPTER 2: I NSTALLING THE S WITCH mends that you provide a minimum of 25 mm or 1 in. clearance). ■ The air is as free of dust as possible. ■ Temperature operating limits are not likely to be exceeded. It is recommended that the unit is installed in a clean, air conditioned environment. It is al...
Page 15 - Figure 2; Reconnect the network cables.; Montagesatz Anweisungen; Entfernen Sie alle Kabel, bevor Sie fort-; Placing Units On Top of Each Other; If the Switch units are free-standing, up to four
Rack-Mounting or Free-Standing 15 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...
Page 16 - Supplying Power to the Switch; Power LED”; Checking for Correct Operation; Table 6; Color
16 C HAPTER 2: I NSTALLING THE S WITCH 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, sti...
Page 17 - Reset the Switch. See; Connecting a Network Device; Figure 3; To connect a device to the Switch:
Connecting a Network Device 17 If POST fails, try the following: ■ Power off the Switch, and then power it on again. Check the Power LED and see if POST was success-fully completed. ■ Reset the Switch. See “Resetting to Factory Defaults” on page 43 . CAUTION: Resetting the Switch to its factory defa...
Page 18 - Using SFP Transceivers; Approved SFP Transceivers; Figure 4; SFP transceivers are keyed and can be
18 C HAPTER 2: I NSTALLING THE S WITCH 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-swappa-ble. You can remove them from and insert them into any SFP port without having to power off t...
Page 19 - Removing an SFP Transceiver; Performing Spot Checks; Table 7; Item
Performing Spot Checks 19 not click when you insert it, remove it, turn it over, and then re-insert it. 3 Remove the plastic protective cover, if fitted. 4 Connect the fiber cable. 5 The transceiver connects to the network using a duplex LC connector. Attach a male duplex LC con-nector on the networ...
Page 21 - The following topics are covered:; Requirements for Accessing the Web Interface; folder on
3 C ONNECTING TO THE W EB I NTERFACE 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 ac...
Page 22 - Figure 5; Next; Figure 6; On the Discovered Devices screen, click; Logging On to the Web Interface
22 C HAPTER 3: C ONNECTING TO THE W EB I NTERFACE 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...
Page 23 - Figure 7; User name; Password; Navigating the Web Interface; Menu; Figure 8; Table 8
Navigating the Web Interface 23 Figure 7 Logon Dialog Box To log on to the Web interface: 1 In User name , type admin . 2 Leave the Password field blank. 3 Click OK . Navigating the Web Interface The Web interface has been designed to enable you to easily perform advanced configuration tasks and vie...
Page 24 - Buttons; Apply; Port Status; Menu Item
24 C HAPTER 3: C ONNECTING TO THE W EB I NTERFACE 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-sens...
Page 25 - Accessing the Interface Without Using Discovery; DHCP Assigned IP Address
Accessing the Interface Without Using Discovery 25 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 addre...
Page 27 - Configuration Overview
4 C ONFIGURING THE S WITCH This chapter provides information on how to config-ure the Switch’s advanced features. Topics include: ■ Viewing Summary Information ■ Changing the Admin Password ■ Modifying the IP Address Settings ■ Configuring Port Settings ■ Configuring VLANs ■ Configuring Trunking ■ M...
Page 28 - Figure 9; Changing the Admin Password
28 C HAPTER 4: C ONFIGURING THE S WITCH Figure 9 Top Half of the Summary Screen If you request for technical assistance from 3Com Support, you may be asked to print out the informa-tion on this screen. Changing the Admin Password To prevent unauthorized users from accessing the Web interface and mod...
Page 29 - Confirm Password; Modifying the IP Address Settings; Automatic IP Configuration
Modifying the IP Address Settings 29 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, r...
Page 30 - Setting the IP Address; To set the IP address for the Switch:; Table 9; Option
30 C HAPTER 4: C ONFIGURING THE S WITCH Setting the IP Address To set the IP address for the Switch: 1 Click IP Settings on the menu. The IP Settings screen appears. Figure 11 IP Settings Screen 2 Configure the Switch’s IP settings. Available options are listed in Table 9 . Table 9 IP Setting Option...
Page 31 - Configuring Port Settings; Basic Port Configuration; “Speed/Duplex for 1000 Mbps Connections”; Speed/Duplex for 1000 Mbps Connections
Configuring Port Settings 31 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. Two tabs are available on the Port Configuration page...
Page 32 - Before manually setting a port to; Advanced Port Configuration; Advanced settings include:; Default Port Settings; All ports are enabled; Configuring VLANs
32 C HAPTER 4: C ONFIGURING THE S WITCH Switch will automatically connect at 1000Mbps, pro-viding 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...
Page 33 - Creating a VLAN; Available options on the Create VLAN screen include:; Deleting VLANs
Configuring VLANs 33 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 communi-cate with other ports on the VLAN), or configure a port make it a member of all VLANs. Communica...
Page 34 - Modifying VLANs; Port – Displays the port number; Defining VLAN Membership; Name – Name of the VLAN (1 to 32 characters); Sample VLAN Configurations
34 C HAPTER 4: C ONFIGURING THE S WITCH Modifying VLANs Use the Modify VLAN screen to change the VLAN to which a port belongs, and configure the port to com-municate with all other VLANs, or a selected VLAN. Figure 16 Modify VLANs Screen ■ Port – Displays the port number ■ Mode – The mode option det...
Page 35 - Setting Up Two VLANs on the Same Switch; illustrates how you can set up a simple; “Creating a VLAN”; Setting Up VLAN Across Two Switches
Configuring VLANs 35 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. Figure 18 Desktop VLAN Configuration If you want to add ports 1, 3, and 26 to VLAN2 (as shown in Figure 18 ), so that the ports on the default ...
Page 36 - To set up the configuration shown in; Configuring Trunking; Guidelines for Creating Trunks; This switch supports a maximum of four trunks.
36 C HAPTER 4: C ONFIGURING THE S WITCH Figure 19 Uplink VLAN Configuration To set up the configuration shown in Figure 19 , 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 po...
Page 37 - Trunk Number – Displays the number of the trunk.; Defining Trunk Membership; Port – The port number; Viewing Trunk Information
Configuring Trunking 37 ■ All ports in a trunk must be configured in an iden-tical manner, including communication mode (that is, speed, duplex mode and flow control). Creating, Modifying, and Deleting Trunks Use the Modify/Delete tabe under Trunking to create, configure or remove ports groups from ...
Page 38 - Monitoring Traffic
38 C HAPTER 4: C ONFIGURING THE S WITCH Figure 22 Summary Screen 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 th...
Page 39 - Using the System Tools; Restarting the Switch; Restart the Switch; Resetting and Backing Up/Restoring Configuration; BACKUP
Using the System Tools 39 For information on how to interpret the output on the port analyzer, refer to its accompanying docu-mentation. Using the System Tools The System Tools menu includes five administration items: ■ Restart ■ Configuration ■ Upgrade ■ Spanning Tree ■ 802.1p Prioritization Restar...
Page 40 - Upgrading the System Software; Browse
40 C HAPTER 4: C ONFIGURING THE S WITCH ■ To reload configuration settings that you previ-ously 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 configu- ration back to the Switch. For security purposes, restoring t...
Page 41 - Do not interrupt power to the Switch; Configuring the Spanning Tree; Enabling redundant paths if the main paths fail.
Using the System Tools 41 CAUTION: Do not interrupt power to the Switch during the upgrade procedure. If you do, the soft-ware 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 forw...
Page 43 - ROUBLESHOOTING; Appendix A; Resetting to Factory Defaults; Forgotten Password
5 T ROUBLESHOOTING 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://knowledgeb...
Page 44 - Forgotten Static IP Address; “Running the Discovery Application”; Solving LED Issues; Chapter 1
44 C HAPTER 5: T ROUBLESHOOTING access. See “Resetting to Factory Defaults” on page 43 for instructions. After resetting the Switch, log on to the Web inter-face using the default admin account settings: ■ User name – admin ■ Password – blank (no password) Forgotten Static IP Address If you forget t...
Page 45 - Ensure that the connected device has either:; All ports appear to show continual activity.; If the Problem Persists; A brief description of the issue
If the Problem Persists 45 The Switch supports full-duplex autonegotiation. If the connected device does not support autonegotia-tion, ensure that it is configured for half-duplex oper-ation only. If the connected device has autonegotiation disabled or overridden, and is config-ured as full-duplex, ...
Page 47 - Register Your Product; ian; can include 24x7 telephone technical support,; Troubleshoot Online; Com Knowledgebase; helps you troubleshoot; Access Software Downloads; Software Updates; are the bug fix / maintenance
A O BTAINING S UPPORT FOR Y OUR P RODUCT 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 war-ranty and other service benefits available to you. Warranty and other service ...
Page 48 - Software Upgrades; are the software releases that; Telephone Technical Support and Repair; Diagnostic error messages; Contact Us
48 A PPENDIX A: O BTAINING S UPPORT FOR Y OUR P RODUCT 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 origi-nal product. In order to access upgrades and ...
Page 50 - US and Canada Telephone Technical Support and Repair
50 A PPENDIX A: O BTAINING S UPPORT FOR Y OUR P RODUCT AntiguaArgentinaArubaBahamasBarbadosBelizeBermudaBonaireBrazilCaymanChileColombiaCosta RicaCuracaoEcuadorDominican RepublicGuatemalaHaitiHondurasJamaicaMartiniqueMexicoNicaraguaPanamaParaguayPeruPuerto RicoSalvadorTrinidad and TobagoUruguayVenez...
Page 51 - Important Safety Information; Installation and removal of the unit must; France and Peru Only; This unit cannot be powered from IT
B S AFETY I NFORMATION Important Safety Information Please read the following safety information carefully before installing the 3Com Baseline Switch 2250 Plus. WARNING: Installation and removal of the unit must be carried out by qualified personnel only. ■ If installing the Switch unit in a stack w...
Page 52 - Power Cord Set; Fiber Optic Ports – Optical Safety; Consignes Importantes de Sécurité; L’installation et la dépose de ce
52 A PPENDIX B: S AFETY I NFORMATION Power Cord Set This must be approved for the country where it will be used. 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. ...
Page 53 - France et Pérou Uniquement; Il doit être agréé dans le pays d’utilisation.
Consignes Importantes de Sécurité 53 ■ 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 débran-chant son cordon électrique au niveau de cette prise. ■ L’appareil fonctionne à une tension extrêmement basse de...
Page 54 - AVERTISSEMENT; Wichtige Sicherheitshinweise Informationen; Die Installation und der Ausbau des; Stromkabel
54 A PPENDIX B: S AFETY I NFORMATION AVERTISSEMENT : Ports pour fibres optiques – sécu- rité sur le plan optique 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....
Page 57 - Related Standards; Environmental
C T ECHNICAL I NFORMATION Related Standards The 3Com Baseline Switch 2250 Plus has been designed to the following standards: Environmental Physical Electrical Functional ISO 8802-3, IEEE 802.3 (Ethernet), IEEE 802.3u (Fast Ethernet), IEEE 802.3ab (Gigabit Ethernet), IEEE 802.3x (Flow Control), IEEE ...
Page 59 - LOSSARY; autonegotiation
G LOSSARY 10BASE-T The IEEE specification for 10 Mbps Ethernet over Cat-egory 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 f...
Page 60 - Dynamic Host Configuration Protocol.
60 G LOSSARY 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. category 6 c...
Page 61 - See
G LOSSARY 61 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 pri...
Page 62 - A network that is a component of a larger network.
62 G LOSSARY network A network is a collection of computers and other computer equipment that are connected for the pur-pose of exchanging information or sharing resources. Networks vary in size, some are within a single room, others span continents. ping Packet Internet Groper. An internet utility ...
Page 63 - traffic monitoring
G LOSSARY 63 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 destina-tion. IP relates to the address of the end station to which data is being sent, as well as the address of the destination network. tr...
Page 65 - NDEX; Numbers
I NDEX Numbers 1000BASE-LX 591000BASE-SX 591000BASE-T 59100BASE-TX 5910BASE-T 59 A auto IP configuration 29 default IP address 29default mask 29 autonegotiation 7autosensing 7 B bandwidth 59 C client 60configuration overview 27 connecting network device 17SFP transceivers 18 conventions notice icons...
Page 67 - FCC S; CE S
R EGULATORY N OTICES FCC S TATEMENT 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 comme...
