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Configuring VLANs

47

Figure 30

VLAN Detail Screen

Forwarding Tagged/Untagged Frames

Each port on the Switch is capable of passing
tagged or untagged frames.

The following describes how the Switch will
handle tagged and untagged frames.

■

When a port receives a tagged frame with a
VLAN ID and the port is a member
(untagged or tagged) of that VLAN, the
frame is accepted. Otherwise the if the port

is not a member of that VLAN, the frame is
discarded.

■

When a port receives an 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 tag and forwarded
as untagged. However, if the port is a tagged
member, the egress frame is forwarded as
tagged.

Sample VLAN Configurations

To illustrate how you can segment network
devices that are connected to the Switch, the
following sample configurations are provided.

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Summary of Contents for 2426-PWR - Baseline Switch Plus

Page 1: ...www 3com com Part No 10015243 Rev AA Published August 2006 Baseline Switch 2426 PWR Plus User Guide Installationsanleitung 3C16491 ...

Page 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 ...

Page 3: ...eisungen 17 Placing Units On Top 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...

Page 4: ...per Port 59 Port Mirroring 61 Statistics 62 QoS VoIP Traffic Settings 63 Security 66 RADIUS Client 66 802 1X Settings 68 Monitoring 70 Address Table 70 Cable Diagnostics 71 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 Val...

Page 5: ...REGULATORY NOTICES GLOSSARY INDEX ...

Page 6: ......

Page 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...

Page 8: ...be 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 R...

Page 9: ...5 10 100 Mbps auto negotiating ports and 2 Gigabit combo ports which comprised of a RJ 45 port and a Small Form Factor Pluggable SFP transceiver slot on the front 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 ...

Page 10: ...d The 1000 Mbps connections can only operate in full duplex mode 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 10 and Rear Panel on page 13 Figure 1 Front and Rear Panels Front Panel The front panel of the Switch contains a series of indicator lights LEDs that help describe the state of various...

Page 11: ...ly determined by the capabilities of the connected device The Switch also support IEEE 802 3af 2003 standard 802 3af Power over Ethernet capabilities Each port can detect connected 802 3af compliant network devices such as IP phones or wireless access points and automatically supply the required DC power 2 Gigabit Combo Ports RJ 45 SFP The Gigabit combo ports RJ 45 Small Form Factor Pluggable SFP ...

Page 12: ...le 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 supplier for further advice Status Meaning Green The link is operating at 100 Mbps Yellow The link is operating ...

Page 13: ...tage 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 configurat...

Page 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 ...

Page 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...

Page 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...

Page 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 ...

Page 18: ...y 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 Socket on page 13 for more information 2 Plug the other end of the power cord into a power outlet When ...

Page 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...

Page 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 ...

Page 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...

Page 22: ...22 INSTALLING THE SWITCH ...

Page 23: ... 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 whic...

Page 24: ... 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 co...

Page 25: ...Web 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...

Page 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 ...

Page 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...

Page 28: ...on summary Create an aggregation group Modify the port memberships Remove an aggregation group Menu Item Description Spanning Tree per 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 Port Mirroring Monitor traffic going in and out of ports Statistics Display...

Page 29: ...tains tabs that allow you to Display Radius Client information Configure Radius Client settings and set authentication parameters 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 table information for...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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 ...

Page 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...

Page 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...

Page 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...

Page 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 ...

Page 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...

Page 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 ...

Page 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...

Page 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...

Page 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...

Page 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 ...

Page 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...

Page 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 ...

Page 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...

Page 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...

Page 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...

Page 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...

Page 52: ...work 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 PoE Click Device then PoE on the menu A screen appears with two tabs that include Summary Setup Summary Use the Summary tab to display the device and ...

Page 53: ... Range 3 15 4 Watts Figure 38 PoE Setup Screen Configuring Port Settings Using the Web interface you can configure the speed duplex flow control link aggregation and port mirroring settings of each port You can also view the current connection 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 St...

Page 54: ... or Duplex for all the ports Figure 39 Port Administration Summary Screen Detail Use the Detail tab to display detailed port setting information for a port Figure 40 Port Administration Detail Screen Setup Use the Setup tab to configure the port settings The following options are available Port State Enables and disables the port ...

Page 55: ...egotiation sets the optimum combination of speed and duplex that can be supported by both ends of the link Duplex Sets the duplex mode of the port Available options include Auto Half and Full CAUTION It is advised not to enable Flow Control on ports that will be connected to telephony and other time sensitive traffic as it may hamper the QoS performance If you modify any of these settings click Ap...

Page 56: ...ports that are members of a trunk or aggregated link Supported SFP transceivers only operate at 1000 Mbps full duplex Inserting an SFP transceiver into a gigabit port disables the corresponding RJ 45 port even if no fiber cable is inserted Link Aggregation Link aggregation also called trunking refers to bonding multiple ports into a single group to effectively combine the bandwidth into a single c...

Page 57: ...low control Four tabs are available on the Port Link Aggregation page Summary Create Modify Remove Summary Use the Summary tab to display Group ID Port members and Link Type for a list of link aggregate groups Figure 42 Link Aggregation Summary Screen Create Use the Create tab to add ports to a group membership Figure 43 Link Aggregation Create Screen ...

Page 58: ...link aggregation group Figure 44 Link Aggregation Modify Screen To modify a link aggregation group 1 Select the aggregation group to modify then click Select 2 Select the ports to add to the goup 3 Click Apply Remove Use the Remove tab delete a link aggregation group Figure 45 Link Aggregation Remove Screen To remove a link aggregation group 1 From the link aggregation group list select the aggreg...

Page 59: ... Bridge Protocol Data Units on all ports at a regular interval known as the Hello Time All other spanning tree compliant devices on the network have a designated Root Port This is the Port nearest 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 Bridg...

Page 60: ...ning Tree Summary Screen Detail Use the Detail tab to display detailed spanning tree information for a port Figure 47 Spanning Tree Detail Screen Setup Use the Setup tab to configure the spanning tree settings for each port The following options are available Status Enables and disables spanning tree for the port Edged Port Enables and disables edged port for the port ...

Page 61: ... save your changes Figure 48 Spanning Tree Setup Screen Port Mirroring 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 an...

Page 62: ...ed to the analyser port 4 Select the port number under Analyser Port to which you connected the network analyzer Traffic to and from the selected mirrored ports will be forwarded to this port 5 Under Mirror Type select to monitor incoming traffic outgoing traffic or both 6 Click Apply Statistics The Switch allows you to statistics of a particular port Figure 50 Port Statistics Screen To display st...

Page 63: ...up Port Setup Port Detail OUI Summary OUI Modify Summary Use the Summary tab to display the global settings for Voice VLAN Figure 51 QoS VoIP Summary Screen Setup Use the Setup tab to configure the global settings for Voice VLAN The following options are available Voice VLAN Status Enable or disable Voice VLAN for the switch Voice VLAN ID Input the Voice VLAN ID for the switch Voice VLAN Aging Tim...

Page 64: ...b to configure the port or trunk setting for Voice VLAN The following options are available Voice VLAN Port Mode Select between None Manual or Auto Voice VLAN Port Security Enable or disable the security To configure the Voice VLAN settings for ports 1 Select Voice VLAN Mode and Security settings 2 Select the ports you would like to apply these settings to 3 Click Apply Figure 53 QoS Port Setup Sc...

Page 65: ...izational Unique Identifier for a company and their description Figure 55 QoS OUI Summary Screen OUI Add Use the OUI Modify tab to add to the list of Organizational Unique Identifier The following options are available Telephony OUI Input a new company identifier to add to the list Description Input a description for the new company identifier To add to the OUI list 1 Enter a Telephony OUI and des...

Page 66: ...gs RADIUS Client Remote Authentication Dial in User Service RADIUS is a logon authentication protocol that uses software running on a central server to control access to RADIUS aware devices on the network An authentication server contains a database of multiple user name password pairs with associated privilege levels for each user or group that require management access to a switch The RADIUS Cl...

Page 67: ...ber of retries of sending authentication requests Timeout Sets the interval between sending authentication requests IP Address The IP address of the RADIUS server 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 58 RADIUS Client Configure Screen ...

Page 68: ...ized 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 Figure 59 802 1X Summary Screen Detail Use the Detail tab to display detailed 802 1X authentication information for a port ...

Page 69: ... be denied access Force Authorized Forces the port to grant access to all clients either dot1x aware or otherwise Force Unauthorized Forces the port to deny access to all clients either dot1x aware or otherwise Maximum Request Sets the maximum number of times the switch port will retransmit an EAP request packet to the client before it times out the authentication session Range 1 10 Default 2 Mode...

Page 70: ...period during an authentication session that the switch waits before re transmitting an EAP packet Range 1 65535 Default 30 seconds After you have filled in the parameters click Apply to save your changes Figure 61 802 1X Setup Screen Monitoring Using the Web interface you can display address table information and cable diagnostics The Monitoring menu includes two items Address Table Cable Diagnos...

Page 71: ...hich helps you detect and resolve issues with the attached cables The Cable Diagnostics menu includes two tabs Summary Diagnostics Summary Use the Summary tab to display information on Test Result Cable Fault Distance or Last Update for every port on the switch Figure 63 Cable Diagnostic Summary Screen ...

Page 72: ...72 CHAPTER 4 CONFIGURING THE SWITCH Diagnostics Use the Diagnostics tab to display individual port information on Test Result Cable Fault Distance and Last Update Figure 64 Cable Diagnostic Screen ...

Page 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...

Page 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...

Page 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...

Page 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 ...

Page 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...

Page 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 ...

Page 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 ...

Page 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...

Page 81: ...22 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 19 in rack mounted usi...

Page 82: ...82 APPENDIX B TECHNICAL INFORMATION ...

Page 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 ...

Page 84: ...84 APPENDIX C SAFETY INFORMATION ...

Page 85: ...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...

Page 86: ......

Page 87: ...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 ...

Page 88: ...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...

Page 89: ...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...

Page 90: ...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...

Page 91: ...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...

Page 92: ...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 ...

Page 93: ...e 8 CSA statement 85 D DHCP 88 diagram front panel 10 Discovery 23 dynamic host control protocol 88 E Ethernet 88 F Fast Ethernet 88 FCC statement 85 Feedback about this User Guide 8 forgotten IP address 74 forgotten password 74 front panel diagram 10 full duplex 89 G Gigabit Ethernet 88 Glossary 87 H half duplex 89 I IEEE 89 IETF 89 IP address auto configuration 33 modifying 33 IP defined 89 ISP ...

Page 94: ...subnet mask 91 Switch positioning 15 switch defined 91 T TCP IP 89 defined 91 technical specifications 81 traffic 91 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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