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Security

■

UDP port – The RADIUS server UDP port
used for authentication messages.

■

Key – Sets the RADIUS encryption key.

After you have filled in the parameters, click

Apply

to save your changes.

Figure 56

RADIUS Client Configure Screen

802.1X Settings

The IEEE 802.1X (dot1x) standard defines a
port-based access control procedure that
prevents unauthorized access to a network by
requiring users to first submit credentials for
authentication.

The 802.1X settings menu includes three tabs:

■

Summary

■

Detail

■

Setup

Summary

Use the

Summary

tab to display the 802.1X

authentication settings.

Содержание 3C16475CS

Страница 1: ...www 3com com Part No 10015240 Rev AA Published August 2006 Baseline Switch 2226 Plus User Guide Installationsanleitung 3C16475CS ...

Страница 2: ...gree 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 3Com Express 3Com Guardian and the 3Com logo are registered trademarks of 3Com ...

Страница 3: ...of Each Other 17 Supplying Power to the Switch 18 Checking for Correct Operation 18 Using SFP Tranceivers 19 Approved SFP Transceivers 19 Inserting an SFP Transceiver 19 Removing an SFP Transceiver 20 Performing Spot Checks 21 3 CONNECTING TO THE WEB INTERFACE Requirements for Accessing the Web Interface 23 Running the Discovery Application 23 Logging On to the Web Interface 25 Navigating the Web ...

Страница 4: ...irroring 61 Statistics 62 QoS VoIP Traffic Settings 62 Security 65 RADIUS Client 65 802 1X Settings 67 Monitoring 70 Address Table 70 Cable Diagnostics 70 5 TROUBLESHOOTING Resetting to Factory Defaults 73 Forgotten Password 74 Forgotten Static IP Address 74 Solving LED Issues 74 If the Problem Persists 76 A OBTAINING SUPPORT FOR YOUR PRODUCT Register Your Product 77 Purchase Value Added Services ...

Страница 5: ...GLOSSARY REGULATORY NOTICES INDEX ...

Страница 6: ......

Страница 7: ...rks voraus If release notes are shipped with your product and the information there differs from the information in this guide follow the instructions in the release notes Most user guides and release notes are available in Adobe Acrobat Reader Portable Document Format PDF or HTML on the 3Com World Wide Web site www 3com com Conventions Table 1 and Table 2 list conventions that are used throughout...

Страница 8: ... directed in the first instance to your network supplier Product Registration You can now register your Baseline Switch on the 3Com Web site to receive up to date information on your product http esupport 3com com Table 2 Text Conventions Convention Description 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 Ret...

Страница 9: ...ont panel for easy flexible connection to fiber based Gigabit media 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 ...

Страница 10: ...hielded or unshielded jacks can be connected to these data sockets AVERTISSEMENT Points d accès RJ 45 Ceux ci sont protégés par des prises de données Ils ne peuvent pas être utilisés comme prises de téléphone conventionnelles standard ni pour la connection de l unité à un réseau téléphonique central privé ou public Raccorder seulement connecteurs de données RJ 45 systèmes de réseaux de téléphonie ...

Страница 11: ...he associated RJ 45 port of the same number is disabled 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 The default active port is the...

Страница 12: ...unit or the device connected to the port is faulty Contact your supplier for further advice Status Meaning Green The link is operating at 100 Mbps Yellow The link is operating at 10 Mbps Flashing Green Packets are being received or transmitted on the port at 100 Mbps Flashing Yellow Packets are being received or transmitted on the port at 10 Mbps Off The link has not been established either nothin...

Страница 13: ... Only use the power cord that is supplied with the unit 8 Recovery Button The recovery button reinitializes the Switch This returns the Switch to the factory default settings if for example you have forgotten the default IP address or forgotten your user name or password CAUTION 3Com recommends that you back up your configuration settings before you recover the Switch otherwise your configuration ...

Страница 14: ...witch package is complete The Switch comes with One power cord Four standard height self adhesive rubber pads One mounting kit Installation CD This User Guide Warranty flyer The Switch is powered from the AC supply If any of the above items are damaged or missing contact your 3Com network supplier immediately ...

Страница 15: ... C de ce guide WARNHINWEIS Sicherheitsinformationen Bevor Sie Komponenten aus dem Switch entfernen oder dem Switch hinzufuegen oder Instandhaltungsarbeiten verrichten lesen Sie die Sicherheitsanweisungen die in Anhang C Appendix C in diesem Handbuch aufgefuehrt sind ADVERTENCIA Información de Seguridad Antes de instalar o extraer cualquier componente del product o de realizar tareas de mantenimien...

Страница 16: ... a ground point If one is not available try to keep in contact with a grounded rack and avoid touching the unit s ports and connectors if possible Static discharge can cause reliability problems in your equipment Rack Mounting or Free Standing The unit can be mounted in a 19 inch equipment rack using the mounting kit or it can be free standing Do not place objects on top of the unit or stack CAUTI...

Страница 17: ...Entfernen Sie die selbstklebenden Polster Füße von der Unterseite der Baugruppe falls diese bereits angebracht sind 1 Plazieren Sie die Baugruppe aufrecht auf einer harten ebenen Fläche mit der Vorderseite zu Ihnen 2 Ordnen Sie eine der Halterungen über den Löchern an der Seite der Baugruppe an 3 Stecken Sie zwei der mitgelieferten Schrauben in die Löcher und drehen Sie diese mit einem geeigneten ...

Страница 18: ...curely connected CAUTION The Switch has no ON OFF switch The only way to power on and power off the Switch is by connecting and disconnecting the power cord This is called power cycling To power on the Switch 1 Plug the power cord into the power socket on the rear panel of the Switch Refer to 7 Power Supply on page 13 for more information 2 Plug the other end of the power cord into a power outlet ...

Страница 19: ...them from and insert them into any SFP port without having to power down the Switch Approved SFP Transceivers The following list of approved SFP transceivers is correct at the time of publication 3CSFP91 SFP SX 3CSFP92 SFP LX To access the latest list of approved SFP transceivers for the Switch on the 3Com Web site enter this URL into your Internet browser http www 3com com 3Com recommends using 3...

Страница 20: ...ly inserted only one way If the transceiver does not click when you insert it remove it turn it over and reinsert it 3 Remove the plastic protective cover if fitted 4 Connect the fiber cable 5 Attach a male duplex LC connector on the network cable into the duplex LC connector on the transceiver 6 Connect the other end of the cable to a device fitted with an appropriate Gigabit Ethernet connection ...

Страница 21: ...Com recommends periodically checking the items listed in Table 1 Table 1 Items to Check If you experience any problems operating the Switch refer to Troubleshooting on page 73 Cabling Check that 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 near to the fron...

Страница 22: ...22 INSTALLING THE SWITCH ...

Страница 23: ... and buttons that are available on the Web interface The following topics are covered Requirements for Accessing the Web Interface Running the Discovery Application Logging On to the Web Interface Navigating the Web Interface Accessing the Interface Without Using Discovery Requirements for Accessing the Web Interface To connect to the Web interface you need the following The Discovery application ...

Страница 24: ...h insert the CD ROM into its CD drive 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 The Welcome screen of Discovery appears Figure 4 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 c...

Страница 25: ... interface appears 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 The logon screen also displays the IP address that the Switch is currently using Figure 6 Logon Dialog Box To log on to the Web interface 1 ...

Страница 26: ...nced 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 related screen appears in the main part of the interface Some menu items will give you sub menu tabs to choose from Figure 7 Switch Screen Layout Menu Sub Menu Tabs System Information ...

Страница 27: ...u to restore a saved configuration Firmware Upgrade Allows you to upgrade the current firmware via HTTP Initialize Allows you to reset the Switch to factory default settings Reboot Allows you to perform system reboot System Access Contains tabs that allow you to Display user summary information Create a new user Modify existing users Remove existing users System Time Allows you to set the system t...

Страница 28: ...Port Contains tabs that allow you to Display selected spanning tree information for every port Display individual port spanning tree information Modify the spanning tree settings for a port Menu Item Description Port Mirroring Monitor traffic going in and out of ports Statistics Display statistics for a selected port QoS Configures QoS settings VoIP Traffic Setting Contains tabs that allow you to ...

Страница 29: ...k the port on the image for the these following configuration options View detailed port information Configure the port settings View port statistics 802 1X Settings Contains tabs that allow you to Display system authentication summary Display detailed information per port Configure system authentication settings Monitoring Display Switch monitoring information Address Table Displays MAC address t...

Страница 30: ...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 For ex...

Страница 31: ...ch 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 Upgrade the firmware Device Summary Information The Device Summary screen which automatically loads after you log on to the Web interface prov...

Страница 32: ...oom Version and Hardware Version Figure 8 Device View If you request for technical assistance from 3Com Support you may be asked to print out the information on this screen Polling Interval Enter the interval in seconds you would like the Switch to refresh Range 10 to 180 seconds 0 to disable polling Figure 9 Polling Interval To set the polling interval 1 Click the Device Summary menu click Pollin...

Страница 33: ...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 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 t...

Страница 34: ...P 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 network 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 usin...

Страница 35: ...ckup Configuration screen appears Figure 12 Backup Configuration 2 Click OK You will be prompted to provide a location where the configuration file will be saved Restore Configuration To reload configuration settings that you previously saved to a file 1 Click Administration then Restore Configuration on the menu The Restore Configuration screen appears Figure 13 Restore Configuration ...

Страница 36: ... the Switch the Switch will restart and apply the newer system firmware version Figure 14 Upgrade Screen 1 Click Administration then Firmware Upgrade on the menu The Firmware Upgrade screen appears 2 Once you have downloaded the firmware use the Browse button to locate the file on your computer and then click OK You may need to change the file type in the dialog box displayed by your Web browser t...

Страница 37: ...Switch to factory default settings 1 Click Administration then Initialize on the menu You will lose all your configuration changes The Switch LAN IP address will revert to the default IP address 169 254 x y see Automatic IP Configuration on page 33 You may need to restart your computer to re establish communication with the Switch Reboot Clicking on Administration then Reboot on the menu has the s...

Страница 38: ... 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 The password can be up to 8 characters long and is case sensitive If you forget the administration passwo...

Страница 39: ... User This page allows you to create a user and define the access level and password for that user Figure 16 Create User Screen Modify User This page allows you to modify a user s access level and password Figure 17 Modify User Screen ...

Страница 40: ...s Figure 19 System Time Screen SNMP Simple Network Management Protocol SNMP is a communication protocol designed specifically for managing devices on a network Equipment commonly managed with SNMP includes switches routers and host computers SNMP is typically used to configure these devices for proper operation in a network environment as well as to monitor them to evaluate performance or detect p...

Страница 41: ...splays the list community access strings Figure 20 SNMP Summary Screen Setup Enable or disable the SNMP Agent Status Figure 21 SNMP Setup Screen SNMP Add This page allows you to create community strings for management access Figure 22 SNMP Add Screen ...

Страница 42: ...se 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...

Страница 43: ...ces you must specify a VLAN ID for each VLAN Figure 24 Setup Screen Available option on the Setup screen include VLAN ID ID of configured VLAN 1 4094 no leading zeroes For examples on setting up VLANs refer to Sample VLAN Configurations CAUTION At least one port must always be an untagged member of VLAN 1 the management VLAN If you choose to connect all ports to VLANs other than VLAN 1 you will no...

Страница 44: ...gs and configure the port to communicate with all other VLANs or a selected VLAN Figure 25 Modify VLAN Screen 1 Enter a set of VLANs or select all VLANs to configure then click Select 2 From the drop down menu select a VLAN to modify 3 Select a membership use Available options for each port include only one option can be associated with a single port Tagged Untagged 4 Select ports to associate wit...

Страница 45: ...gged Untagged 2 Select a port to associate with the membership 3 Enter a VLAN to apply these changes to then click Apply Rename Use the Rename screen to change the name of a VLAN Figure 27 Rename Screen 1 Enter a set of VLANs or select all VLANs to add to the rename list then click Select 2 From the list of selected VLANs choose a VLAN to rename Enter a new VLAN name and click Apply ...

Страница 46: ...utton to select all the VLANs Click Remove to remove the VLAN Port Detail Choose a port to display the tagged and untagged VLAN memberships it is associated with Figure 29 Port Detail Screen VLAN Detail Use this screen to display detailed VLAN information 1 Enter a set of VLANs or select all VLANs to add to the details list then click Select 2 From drop down menu choose a VLAN to display the tagge...

Страница 47: ... untagged frame and the port is an untagged member of a VLAN the frame is accepted and assigned to that VLAN ID Otherwise if the port is not an untagged member of any VLAN the frame is discarded The Switch will only forward a frame to ports that are members tagged or untagged of the VLAN to which the frame is assigned If the port is an untagged member the egress frame will be stripped of the VLAN ...

Страница 48: ...o 2 Refer to Setup for instructions VLAN1 is the default VLAN and already exists 2 Set ports 1 3 and 26 to associate with the Untagged membership in VLAN2 3 Click Apply Ports 1 3 and 26 now belong to VLAN2 and will not communicate with any other ports unless you add other ports to the VLAN or change the port configuration Setting Up VLAN Across Two Switches This example explains how you can set up...

Страница 49: ... Switch 2 set the ports that you want to be part of VLAN2 to Untagged Set one port for example port 8 to Tagged Click Apply 4 Connect the Tagged port on Switch 1 in this example port 16 to the Tagged 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 Spanning Tree Spanning tree is a br...

Страница 50: ...rest the Root Bridge and it is used for receiving the BPDUs initiated by the Root Bridge If a bridge does not get a Hello BPDU after a predetermined interval the bridge assumes that the link to the Root Bridge is down This bridge will then initiate negotiations with other bridges to reconfigure the network to reestablish a valid network topology After all the bridges on the network have determined...

Страница 51: ...This procedure is called multicast filtering The purpose of IP multicast filtering is to optimize a switched network s performance so multicast packets will only be forwarded to those ports containing multicast group hosts or multicast routers switches instead of flooding traffic to all ports in the subnet VLAN Choose enable or disable from the IGMP Snooping Mode drop down menu Figure 34 IGMP Snoo...

Страница 52: ...ypically with wrong answers that start the process over again Broadcast storms use substantial network bandwidth and may cause network time outs The settings include Status Enables and disables broadcast storm control Packet Rate Threshold Sets the broadcast storm threshold 64 to 1000000 kilobits per second Figure 36 Broadcast Storm Setup Screen ...

Страница 53: ... status of each port or shut down or disable ports The Port menu includes five items Administration Link Aggregation Spanning Tree per Port Port Mirroring Statistics Administration Three tabs are available on the Port Administration page Summary Detail Setup Summary Use the Summary tab to display Port State Flow Control Speed Default VLAN ID Link Type or Duplex for all the ports Figure 37 Port Adm...

Страница 54: ...than a receiving device can process If flow control is disabled packets may be dropped under certain periods of high traffic Flow control is disabled by default Speed Sets the speed mode of the port Available options include auto 10 100 and 1000 For 1000 Mbps connections see Speed Duplex for 1000 Mbps Connections below Auto or autonegotiation sets the optimum combination of speed and duplex that c...

Страница 55: ...lly 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 unsur...

Страница 56: ...to work the trunks must be configured on both ends switches Guidelines for Creating Trunks Any port on the Switch can be used for creating a trunk This switch supports a maximum of four trunks Each trunk may contain up to four members A port may only be a member of one trunk at any one time All ports in a trunk must be configured in an identical manner including communication mode that is speed du...

Страница 57: ...roup membership Figure 41 Link Aggregation Create Screen To create a new link aggregation group 1 Enter a link aggregation group ID in the box field 2 Select the ports to add to the goup 3 Click Apply Modify Use the Modify tab reassign port members to a link aggregation group Figure 42 Link Aggregation Modify Screen ...

Страница 58: ...Spanning tree is a bridge based system for providing fault tolerance on networks and can be used to detect and disable network loops The spanning tree ensures that the optimal path is maintained between spanning tree compliant networked devices by Disabling redundant paths when the main paths are operational Enabling redundant paths if the main paths fail Spanning tree uses a distributed algorithm...

Страница 59: ...gy After all the bridges on the network have determined the configuration of their ports each bridge only forwards traffic between the Root Port and the ports that are the Designated Bridge Ports for each network segment All other ports are blocked which means that they are prevented from forwarding traffic Three tabs are available on the Spanning Tree per Port page Summary Detail Setup Summary Us...

Страница 60: ... between Point to Point Shared or Auto for the link type Path Cost The path cost is used to determine the best path between devices The path cost method is used to determine the range of values that can be assigned to each interface Port Priority Used in selecting the root device root port and designated port The device with the highest priority becomes the STA root device However if all devices h...

Страница 61: ...TION The analyzer port should have a higher bandwidth than the mirror port Otherwise the Switch may not be able to copy all traffic effectively during periods of high traffic Figure 47 Port Mirroring Setup Screen To set up port mirroring 1 Connect a network analyzer to a port 2 Access the Web interface Click Port then Port Mirroring on the menu The Port Monitoring Setup Screen appears 3 Select the...

Страница 62: ...the Web interface Click Port then Statistics on the menu The Port Statistics Screen appears 2 Select the a port and enter a refresh interval 3 Click Apply QoS VoIP Traffic Settings Using the Web interface you can configure the Voice over Internet Protocol VoIP settings The QoS VoIP Traffic Setting menu includes six tabs Summary Setup Port Setup Port Detail OUI Summary OUI Modify ...

Страница 63: ... VLAN for the switch Voice VLAN ID Input the Voice VLAN ID for the switch Voice VLAN Aging Time Input the aging time You must first create a VLAN from the VLAN Setup page before you can assign and configure a Voice VLAN Figure 50 QoS VoIP Setup Screen Port Setup Use the Port Setup tab to configure the port or trunk setting for Voice VLAN The following options are available Voice VLAN Port Mode Sel...

Страница 64: ...ke to apply these settings to 3 Click Apply Figure 51 QoS Port Setup Screen Port Detail Use the Port Detail tab to display the Voice VLAN information for selected ports Figure 52 QoS Port Detail Screen OUI Summary Use the OUI Summary tab to display the list of Organizational Unique Identifier for a company and their description Figure 53 QoS OUI Summary Screen ...

Страница 65: ...OUI list 1 Enter a Telephony OUI and description 2 Click Add To remove an OUI from the list 1 Select a Telephony OUI from the list 2 Click Remove Figure 54 QoS OUI Modify Screen Security Using the Web interface you can configure the RADIUS Client and 802 1X settings The Security menu includes two items RADIUS Client 802 1X Settings RADIUS Client Remote Authentication Dial in User Service RADIUS is...

Страница 66: ... to a switch The RADIUS Client menu includes two tabs Detail Configure Detail Use the Detail tab to display the RADIUS Client settings Figure 55 RADIUS Client Detail Screen Configure Use the Configure tab to configure the RADIUS settings The following parameters are available Max Retries Sets the number of retries of sending authentication requests Timeout Sets the interval between sending authent...

Страница 67: ...s Figure 56 RADIUS Client Configure Screen 802 1X Settings The IEEE 802 1X dot1x standard defines a port based access control procedure that prevents unauthorized access to a network by requiring users to first submit credentials for authentication The 802 1X settings menu includes three tabs Summary Detail Setup Summary Use the Summary tab to display the 802 1X authentication settings ...

Страница 68: ...Setup Use the Setup tab to configure the 802 1X authenticaion settings The following fields are available System Authentication Sets the global setting for 802 1X Default Disabled Operation Mode Allows single or multiple hosts clients to connect to an 802 1X authorized port Options Single Host Multi Host Default Single Host Mode Sets the authentication mode to one of the following options ...

Страница 69: ... Re authentication Period Re authentication can be used to detect if a new device is plugged into a switch port Default Disabled Max Count The maximum number of hosts that can connect to a port when the Multi Host operation mode is selected Range 1 1024 Default 5 Reauthentication Period Sets the time period after which a connected client must be re authenticated Range 1 65535 seconds Default 3600 ...

Страница 70: ...ble Diagnostics Address Table Use the Address Table Summary screen to display the Address Table information You can query by selecting a port choosing a VLAN or entering in a MAC Address then click Select Figure 60 Address Table Screen Cable Diagnostics The Switch provides cable diagnostic which helps you detect and resolve issues with the attached cables The Cable Diagnostics menu includes two ta...

Страница 71: ...Result Cable Fault Distance or Last Update for every port on the switch Figure 61 Cable Diagnostic Summary Screen Diagnostics Use the Diagnostics tab to display individual port information on Test Result Cable Fault Distance and Last Update Figure 62 Cable Diagnostic Screen ...

Страница 72: ...72 CHAPTER 4 CONFIGURING THE SWITCH ...

Страница 73: ...you can reset the Switch to factory defaults CAUTION Resetting the Switch to 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...

Страница 74: ...assigned to the Switch and you need to access the Web interface use the Discovery applica tion 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 23 Solving LED Issues This section lists some issues that are related to the LEDs on the front panel of the Switch For information on b...

Страница 75: ...being used Refer to Approved SFP Transceivers on page 19 for details The equipment at the far end is installed and correctly configured The Link Activity LED is on but network performance is poor The Switch supports full duplex autonegotia tion If the connected device does not support autonegotiation ensure that it is configured for half duplex operation only If the connected device has autonegoti...

Страница 76: ...nt 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 If the Problem Persists If the problem persists and the unit still does not operate successfully contact your 3Com network supplier with the following informa tion before ...

Страница 77: ...ue 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 projects...

Страница 78: ...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 Diagnostic error messages Details about recent configuration changes if applicable To send a product directly to 3Com for repair you must first obtain a ...

Страница 79: ...a repair authorization number RMA by fax using this number 65 543 6348 Europe Middle East and Africa Telephone Technical Support and Repair From anywhere in these regions call 44 0 1442 435529 From the following countries you may use the numbers shown Austria Belgium Denmark Finland France Germany Hungary Ireland Israel Italy Luxembourg Netherlands Norway Poland Portugal South Africa Spain Sweden ...

Страница 80: ...112 AT T 800 998 2112 AT T 800 998 2112 AT T 800 998 2112 AT T 800 998 2112 AT T 800 998 2112 AT T 800 998 2112 AT T 800 998 2112 AT T 800 998 2112 AT T 800 998 2112 AT T 800 998 2112 AT T 800 998 2112 52 55 52 01 00 04 01 800 849CARE 01 800 849 2273 AT T 800 998 2112 AT T 800 998 2112 AT T 800 998 2112 AT T 800 998 2112 AT T 800 998 2112 Puerto Rico Saba Anquila St Kitts Neives St Lucia St Vincen...

Страница 81: ... sions EN50081 1 EN 55022 Class A EN50082 1 IEC 1000 4 2 3 4 6 EN60555 2 Class A EN 60555 3 FCC Part 15 Subpart B Class A Immunity EN 55024 Operating Tempera ture 0 45 C 32 113 F Storage Tempera ture 40 70 C 40 158 F Humidity 0 95 non condensing Standard EN 60068 IEC 68 various parts Width 44 cm 17 3 in Depth 23 8 cm 9 4 in Height 4 4 cm 1 7 in or 1U Weight 3 2 kg 7 05 lb Mounting Free standing or...

Страница 82: ...82 APPENDIX B TECHNICAL INFORMATION ...

Страница 83: ...the 3Com Switch Family Safety and Regulatory Information manual included with this product You can find the 3Com Switch Family Safety and Regulatory Information manual on the product CD ROM that was included with your switch You can also download the safety manual from the 3Com Web site www 3Com com ...

Страница 84: ...84 APPENDIX C SAFETY INFORMATION ...

Страница 85: ...lly 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 Auto negotiation is defined in the IEEE 802 3 standard for Ethernet and is an operation that takes place in a few milliseconds Auto negotiation must be enabled for the 1000BASE T ports to operate at 1000 ...

Страница 86: ...to 1000 Mbps Category 6 Cables 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 The term used to describe the desktop PC that is connected to your network DHCP Dynamic Host Configuration Protocol T...

Страница 87: ...e IEEE Std 802 3 2002 IETF 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 IP 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 de...

Страница 88: ...ess 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 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 withi...

Страница 89: ...e 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 TCP IP Transmission Control Protocol Internet Protocol This is the name for two of the most well known protocols developed for the interco...

Страница 90: ...des 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 ...

Страница 91: ...rient 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 b...

Страница 92: ......

Страница 93: ...e 8 CSA statement 91 D DHCP 86 diagram front panel 10 Discovery 23 dynamic host control protocol 86 E Ethernet 86 F Fast Ethernet 86 FCC statement 91 Feedback about this User Guide 8 forgotten IP address 74 forgotten password 74 front panel diagram 10 full duplex 87 G Gigabit Ethernet 86 Glossary 85 H half duplex 87 I IEEE 87 IETF 87 IP address auto configuration 33 modifying 33 IP defined 87 ISP ...

Страница 94: ...subnet mask 89 Switch positioning 15 switch defined 89 T TCP IP 87 defined 89 technical specifications 81 traffic 89 monitoring 61 62 troubleshooting 73 forgotten IP address 74 forgotten password 74 LED related issues 74 POST failed 19 trunking See link aggregation U user name default 38 V viewing status information 31 VLANs 42 creating 49 maximum supported 42 sample configurations 47 W Web interf...

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