Cabletron Systems SEHI-24, SEHI-22, SEHI-32 manual Chapter Troubleshooting, Installation CHECK-OUT

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TROUBLESHOOTING

CHAPTER 5

TROUBLESHOOTING

This chapter contains instructions for using LANVIEW LEDs to troubleshoot physical layer network problems. It also describes how to reset the SEHI.

5.1INSTALLATION CHECK-OUT

After you connect the SEHI to the network, verify that packets pass between all Ethernet devices connected to the SEHI and any other devices connected to the network. If you encounter difﬁculty with any of the attached devices, check the link as follows:

1.Check that the LNK LED, if applicable, for the port is on. If the LED is not on:

a.Check that the 10BASE-T device at the other end of the twisted pair segment is powered up.

b.Verify that the connector on the twisted pair segment has the proper pinouts. Refer to Chapter 2 for the pin assignments for twisted pair connectors.

For EPIM-F1/EPIM-F2 check that the TX and RX fibers are properly connected.

c.Check the cable for continuity. A variety of tools are available for this test, depending on the media you are using.

d.Check that the twisted pair segments meet cable specifications for dB loss described in Chapter 2.

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Contents 10BASE-T Intelligent Stackable HUB USER’S Guide Printed On Recycled Paper FCC Notice DOC NoticeCabletron SYSTEMS, INC Program License Agreement Cabletron Software Program LicenseExclusion of Warranty Disclaimer of Liability United States Government Restricted RightsTable of Contents Troubleshooting InstallationConnecting to the Network Local ManagementContents Appendix B Twisted Pair Wiring Tables A-1 Using this Manual Chapter IntroductionIntroduction Getting Help Sehi OverviewPolarity Detection and Correction Sehi FeaturesRepeater Functionality Flash EEPROMsLocal Management Reset ButtonLanview LEDs Stackable CapabilitiesIntroduction Optional Features EpimDaughter Board Upgrade Kit Rack Mount or Wall Mount HardwareRelated Manuals Cable Specifications HubSTACK Interconnect Cable RequirementsImpedance LengthInsertion Loss JitterCrosstalk DelayTemperature NoiseFiber Optic Budget and Propagation Delay Cable Type Attenuation Maximum Cable LengthInstallation REQUIREMENTS/SPECIFICATIONS Cable Type ConnectorsThin-Net Network Requirements for the EPIM-C Module TerminatorsNetwork Port Specifications AUI Cable Requirements for the EPIM-A and EPIM-X ModulesAUI Cable SEHI-22 and SEHI-24 Network Port Speciﬁcations SEHI-32 and SEHI-34 Network Port SpeciﬁcationsPin Champ Connector Installation REQUIREMENTS/SPECIFICATIONS Epim Specifications EPIM-TEPIM-F1 and EPIM-F2 Parameter Typical Worst Worst Case Typical Value BudgetEPIM-F3 EPIM-F3Parameter Typical Minimum Maximum Connector Type EPIM-CEPIM-A and EPIM-X AUI Port EPIM-A and EPIM-XCOM Transceiver RequirementsGeneral Delay Times Start of PacketsDelay Times JAM PreambleOutput Min. Load Max. Load Max Power Fault ProtectionPower Supply Requirements JAM OutputSafety PhysicalInstalling the Sehi Unpacking the SehiStacking the Sehi Stacking the Sehi Attaching the Strain Relief Bracket Disconnect SEH and Sehi Interconnect Cables At the OUT PortInstalling the Sehi in the Rack Rack Mounting the SehiWall Mounting the Sehi Free-Standing Installation Shelf or Table-top InstallationInstallation Connecting the Sehi to the Power Source Connecting the Sehi to the Network Connecting to Network Ports, SEHI-22 and SEHI-24EPIM-2 Connecting to Network Ports, SEHI-32 and SEHI-34 Connecting a UTP Segment to an EPIM-T EPIM-T Cross-over SwitchConnecting to the Network Connecting to the Network Connecting to the Network Connecting a Thin-Net Segment to an EPIM-C EPIM-C Connecting an AUI Cable to an EPIM-A EPIM-AConnecting an AUI Cable to an EPIM-X Finishing the Installation On Position Toward Back Epim OFF Position Toward FrontChapter Troubleshooting Installation CHECK-OUTUsing Lanview PWR CPURCV Troubleshooting CLNUsing the Reset Button LNKChapter Local Management Local Management Management Terminal Requirements Console Cable Conﬁguration Management Terminal ConnectionGeneral Setup Management Terminal Setup ParametersMenu Function Selection Display Setup SetupLocal Management Accessing Local Management Sehi Local ManagementFeature Selection Screen Local Management Using the Local Management Screens Community Name Table ScreenAccess Community NameEditing the Community Name Field Conﬁguration Screen IP AddressSetting the IP Address Default GatewayPort Enable Override SubNet MaskSetting the Subnet Mask Setting the Default Gateway Using the Port Enable OverrideExiting the Configuration Screen Trap Table ScreenTraps Configuring the Trap TableSnmp Community Name Trap IP AddressExiting the Trap Table Screen Snmp Tools ScreenSet OID PrependGet Get NextStep WalkRecall-OID CyclesGetting Individual OIDs Getting the Next OIDSetting an OID Viewing Multiple OIDsWalking Through OIDs Stepping Through OIDsCycling Through OIDs Exiting the Snmp Tools Screen Device Statistics ScreenAlignment Errors Errors ReceivedCRC Errors Port Admin. StatusUpdate-Freq Enable PortDisable Port Port Seg. StatusUsing the Enable Port Command Selecting the Appropriate Module/PortUsing the Disable Port Command Exiting the Device Statistics ScreenAppendix a Twisted Pair Wiring Tables Twisted Pair Wiring TablesA-2 A-3 A-4 From Punch Down To RJ-45 Into Block Wallplate Ofﬁce 10BASE-TDrop Device A-6 A-7 SEHI-32/34 Punch Wall Plate Champ Down Block If Required Ethernet DeviceFigure A-1. Punch Down Block A-9 Spanish Power Supply CordGerman French