HP J3188A manual Running Connectivity Tests, Obtaining Firmware Enhancements

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Troubleshooting

Troubleshooting

Hub Maintenance Tasks

Running Connectivity Tests

Both the hub and cabling can be tested by running an end-to-end communica- tions test -- a test that sends known data from one network device to another through the hub -- such that you can verify that the data was correctly transmitted between the devices.

PC sending test packets.

PC responding to the test packets.

See your LAN adapter’s manual for information on running an end-to-end communication test.

Obtaining Firmware Enhancements

In the future, Hewlett-Packard may provide improvements to this product through firmware upgrades. The upgrade code can be downloaded from a PC attached to the hub’s RS-232 port or over the network. The update procedures are described in documents that come with the firmware enhancements.

You can determine the current firmware version on the hub from the ASCII console. Look for the SNMP Agent EEPROM version number to determine the revision. When you access the console, the version number appears.

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Contents HP J3188A Page Installation and Reference Guide HP 10Base-T Hub-16M J3188APublication Number Back of the Hub HP 10Base-T Hub-16M J3188AFront of the Hub IiiFeatures Network ConnectionsContents Cables and Connectors Security Information ViiPage Installing the Hub Connect the external transceiver Installing and Configuring Your HubVerify included parts Verify the hub operates correctlyCord connected directly to the hub for proper operation TimeLED PatternMount the hub Rack or Cabinet MountingTable Mounting Connect the hub to your network Connecting Devices to the Hub Connecting Hubs TogetherTwisted-Pair Cascade Connections Installing ThinLAN ConnectionsOhm terminator Connecting the Hub-16M to a Fiber-Optic Backbone Interpreting LED StatusInterpreting Hub Status LEDs Interpreting Port Status LEDs Following table provides LED port informationPage Troubleshooting Troubleshooting ApproachesUsing a Checklist to Diagnose the Hub Troubleshooting Using a Checklist to Diagnose the HubProblem Solution LED Operation Power Coll Troubleshooting LED OperationDiagnostic Tips Hub will automatically recover afterHub Maintenance Tasks Testing the Hub OnlyClearing a Password for the Ascii Console Troubleshooting Hub Maintenance Tasks Running Connectivity TestsObtaining Firmware Enhancements Setting up the Ascii Console Managing the HubDirectly, Using a Serial Cable and a Terminal Remotely, Using TelnetManaging the Hub Remotely, Using a Modem and a Terminal Starting the ConsoleExample HE ST This displays help for the Status command Console Command ReferenceCommands are described in the rest of the chapter Syntax Conventions on Help ScreenBAckup Default DescriptionCounter Name Definition Valid Range CDpstatusCOunters RangeIPconfig When to Use IPconfigDIsconnect Using IP Configuring for Network ManagementUsing Novell NetWare IPX Following table explains the IP parametersParameter Default Value Definition MAnagers SHowCommand Manager Address IP or IPX Receive Alarms?To end your editing NEighbor Displays the other devices that are using CDP protocolMEssageinterval Table entry with ID 1 would now be a blank linePIng PAsswordClear a password Community nameREset POrt port ON/OFFRObustness Security Configuration Parameter Definitions SEcure portSHowCLearManaging the Hub Configuring Security on a Single Port Configuring Security on All Twisted-Pair PortsEavesdrop Prevention, must be set to on Address Selection Authorized Showing the Security Configuration Clearing Security Violation IndicatorsSPeed new speed STatusStatus Information What It Means 16M will respond with the correct packet Network links, see the , TroubleshootingTEstlink To sendPage Cables and Connectors Recommended CablesFollowing table shows PC connections to the RS-232 port Cables and Connectors Following table shows network connections to the hubCable Function Cable Type HP Product Number Pins 3 and 6 must be a twisted pair Twisted-Pair Cable/Connector Pin-OutsPins 1 and 2 must be a twisted pair Twisted-Pair Cable for Hub-to-Computer Network ConnectionCable pin-out described below RS-232 Connector and Cable Pin-OutsInstaller for assistance with your cabling requirements Minimum pin-out will function correctlySignal Minimum Cable Pinout for Ascii Console ConnectionRS-232 Modem Cable Twisted-Pair Cable Pin Assignments Twisted-Pair Straight-Through CableHub End MDI-X Electrical SpecificationsPhysical EnvironmentalConnectors SpecificationsElectromagnetic Modem Configuration US Robotics Courier V.FC/V.34Megahertz XJ2288 Pcmcia card modem Practical Peripherals PM288MT II Intel 14.4EXSupra FAX Network Addressing Communication Between the Hub Network Management StationIPX Addressing Notes IPX Addressing for Novell NetWareIP Addresses for IP and Non-IP Networks Globally Assigned IP Network AddressesDevice IP Configuration CountryCompany Name/Address Using Bootp Bootp ProcessBootp Table File Entries Definitions of the table entry fieldsPage Backup Links How Backup Links WorkBackup Links LimitationsAdditional Notes Hub to a Switch Examples of Backup LinksHow the Backup Function Works Hub to a ServerT e G g e s t i o n Hub can monitor only one linkConfiguring a Backup Link Configuration/Installation SequenceIdentifying the Backup Link Indications of Backup Link ActivationReactivating the Primary Link Page Security Information Understanding Network SecurityAuthorized MAC address How Intruder Prevention WorksHow Eavesdrop Prevention Works Security InformationAssigning the Authorized MAC address Setting Inbound Security with Intruder Prevention Auto Port Disable Send AlarmSetting Outbound Security with Eavesdrop Prevention Security Information Page Safety and Regulatory Statements Mounting PrecautionsSettings to configure Power PrecautionsTemperature might exceed 45C 113F Equipment and should be easily accessibleSafety Information GroundingInformations concernant la sécurité Tible de causer des dommages à léquipementHinweise zur Sicherheit Considerazioni sulla sicurezza Consideraciones sobre seguridad Safety Information Japanese European Community Regulatory StatementsFCC Class a Statement for U.S.A. Only CanadaDeclaration of Conformity Index IndexDiagnosing with the LEDs … 2-2 diagnostic tests Late collision … 3-13 mounting the hub … LED description … Verifying hub operation … Page J3188-90001