3Com 4210 52-PORT, 4210 PWR 18-PORT, 4210 9-PORT Solving Communication Problems, IP Addressing

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54CHAPTER 4: PROBLEM SOLVING

Error message indicating that the SFP transceiver is invalid

The switch has identified that the SFP does not meet the minimum requirements for the switch and has disabled the port. To correct this problem, completely remove the SFP and replace it with a 3Com approved SFP.

Error message indicating that the SFP transceiver is faulty

To correct this problem, completely remove the SFP and then reinsert it.

Alternatively, insert another identical SFP. If the problem persists, contact 3Com

Technical Support.

Solving

Communication

Problems

If you experience communication problems with the switch, ensure that:

■The switch IP address and Management VLAN ID has been configured.

■If the switch is separated from your management application by a router, ensure that the default gateway IP address within the switch is the same as the IP address of the router.

■The switch’s IP address was discovered correctly by your network management application.

The following is a brief overview of IP addressing, and how to obtain a registered IP address.

IP Addressing

To be managed correctly, each device on your network (for example a switch or Hub) must have a unique IP address. IP addresses have the format n.n.n.n where n is a decimal number between 0 and 255. An example IP address is 192.168.100.8.

The IP address is split into two parts:

■The first part (‘192.168.100’ in the example) identifies the network on which the device resides

■The second part (‘.8’ in the example) identifies the device within the network

The natural subnet mask for this example is 255.255.255.0.

If your network has a connection to the external IP network, that is, you access the Internet, you must apply for a registered IP address.

How do you obtain a registered IP Address?

The IP registration system ensures that every IP address used is unique; if you do not have a registered IP address, you may be using an identical address to someone else and your network will not operate correctly.

InterNIC Registration Services is the organization responsible for supplying registered IP addresses. The following contact information is correct at time of publication:

World Wide Web site: http://www.internic.net

If your IP network is internal to your organization only, that is, you do not access the Internet, you may use any arbitrary IP address as long as it is not being used by

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Contents 3Com Switch 4210 Family 3Com Corporation Campus Drive Marlborough, MA USA United States Government LegendContents Obtaining Support for Your 3COM Products Regulatory NoticesAbout this Guide Related Documentation Product Introduction Wire-speed Layer 2 switchingDescription of their features OverviewIntroduction to Switch 4210 Family PWR Switches Switch 4210 9-port PWR Front panelSide panel Power systemRear panel Cooling systemFront panel of a Switch 4210 18-port PWR Shows the front panel of the Switch 4210 26-port PWR model Switch 4210 26-port PWR units support AC input or DC input AC inputDC input-Rated voltage range -52 VDC to -56 VDC 10/100BASE-TX Autosensing Ethernet Port Status LED Power LEDFront Panel LEDs Mbps Uplink Port Status LEDSwitch 4210 9-port Front panel Introduction to the Switch 4210 Family Non-PWR ModelsThis section describes each Switch 4210 Family model Panel StatusSwitch 4210 cools off naturally Switch 4210 18-port Front panelSwitch 4210 26-port Front panel Switch 4210 18-port model’s rear panelSwitch 4210 52-port Front Panel Switch 4210 26-port rear panelPort LED Describes the 10/100Base-TX autosensing port’s Link/Act LEDDescribes the Speed LED on the 10/100Base-TX port Technical Specifications Technical specifications for the SwitchSwitch Model Port PWR Technical specifications for the Switch 4210 PWR models Earthing LeadSFP Modules SwitchSFP modules supported by the Switch Supported forProduct Introduction Installing the Switch Installing the Switch Installing the switch in a 19-inch rack Mount the front bracket to the device Screw FrontInstallation completed Ready for operation Power-upSequence 421052 for a list of suggested solutions Connecting aRedundant Power Supply PWR LED ColorsSystem Rectifiers No Rectifier Power AvailabilitySwitch 4210 Circuit Breaker and Cable Ratings Redundancy +1 RectifierUsing Power over Ethernet RPS Connection to the SwitchConsole Cable ConnectingRJ-45 Signal Direction DB9 console Terminal, as shown in FigureGND RXD DSR CTS Installing the Switch Managing Your Switch Methods of Managing a Switch User ViewSystem View Configured IP information Setting Up YourRefer to Setting Up Snmp Management on Need toConfiguring IP Manually SnmpAutomatically Configuring the IP Address using Dhcp Automatically Configured IPViewing InformationUser View Login You can manually configure the switch IP information by Manually Configuring IP InformationConnecting to Console Port Connecting the Workstation to the SwitchSetting Up the Switch with IP Information Once you have logged in you are automatically in User ViewPrerequisites Using the Web Interface Using Command Line Interface using Telnet Enter the system-viewcommand and EnterConsole Port Connection Where xxx.xxx.xxx.xxx is the IP address of the switchManagement Network TelnetSetting Up Web Setting Up CommandManagement using Line InterfaceNew community string up to 32 characters Setting Up SnmpString is private String to be removedDefault Users Default UsersPasswords User Default Name Password Access LevelProblem Solving Solving Problems Indicated by LEDsProblems Solving HardwareIP Addressing Solving Communication ProblemsError message indicating that the SFP transceiver is faulty How do you obtain a registered IP Address?Formation Problems Solving FabricProblem Solving PC-AT Serial Cable PIN-OUTSNull Modem Cable RJ-45 to RS-232 25-pinEthernet Port RJ-45 Pin Assignments 10/100 and 1000BASE-T RJ-45 connectionsPin assignments Obtaining Support for Your 3COM Products Telephone Technical Available for purchase from your 3Com resellerContact Us Support and RepairCountry Telephone Number Latin America Telephone Technical Support and Repair US and Canada Telephone Technical Support and RepairSupervisor 3COM Network Management3Com Network DirectorAppendix C 3COM Network Management Integration Kit with 3Com EnterpriseManagement Suite HP OpenViewAppendix C 3COM Network Management Safety Information Important Safety Information’information de Sécurité Importante Wichtige SicherheitsinformationenInformación de Seguridad Importante Appendix D Redundant Power Supply Safety Information Ważne informacje o zabezpieczeniach Importanti Informazioni di SicurezzaAppendix D Redundant Power Supply Safety Information How to identify and resolve radio-TV interference problems Regulatory NoticesAppendix D Redundant Power Supply Safety Information
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