Cabletron Systems 3H02-04, 3H08-04 manual Connectivity Problems

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Chapter 5: Diagnostics and Troubleshooting

5.5.2 Connectivity Problems

If the FE Switch Modules power up normally, but the workstations are unable to communicate:

1.Check the LED for abnormalities which may help indicate the source of the problem. (LED behavior during normal operation is explained earlier in this chapter.)

2.Check the status of the ports using Local Console Manager

3.Check for loose connections between the switch module and devices.

4.Check that the proper type of cable is used: crossover or straight-through, depending on the configuration; distance limitations are adhered to, etc. (For more information on other limitations or restrictions that may apply, see the IEEE 802.3 standards specification.)

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FE Switch Module User Guide

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Contents Fast Ethernet Switch Module User GuidePage FE Switch Module User Guide FCC Notice Cabletron SYSTEMS, INC. Program License Agreement United States Government Restricted Rights Contents Contents Chapter Introduction FastNET ATXUsing this Manual 3H02-04 FE Switch Module OverviewConnectors LEDs3 Offline Button 3H08-04 FE Switch Module 3H08-04 Front PanelDocument Conventions Related Manuals Getting HelpFE Switch Module User Guide Chapter Connecting to the Network POWER-UP LED SequenceConnecting to a Network Connecting the 3H02-04 FE Switch ModuleConnecting the 3H08-04 FE Switch Module 3H08-04 Front Panel ConnectionsFE Switch Module User Guide Chapter Configuring Connecting the Local Console Manager Local Console Manager CommandsDisplaying Switch Module Port Status Chapter MonitoringMonitoring Displaying Switch Module Port Status Monitoring FE Switch Module User Guide Chapter Diagnostics and Troubleshooting POWER-UP TestsPOWER-UP Results Operational Diagnostics Diagnostics and TroubleshootingDiagnostic Results TroubleshootingIf the Module Fails to Power Up Connectivity Problems Unpacking the Switch Module Adding a Switch ModuleChapter ADDING/SWAPPING Modules Swapping a Switch Module Swapping a Switch Module FE Switch Module User Guide Appendix a Technical Specifications TCP/IP IPX3H02-04 RJ45 for UTP 3H08-04 ST for Fiber Optics TYPES/CONNECTORS Cable SpecificationsAppendix B Cables About RJ45 Connectors Fast Ethernet PIN AssignmentsCrossover Wiring for the 3H02-04 Fast Ethernet Pin AssignmentsStraight-Through Wiring for the 3H02-04 Limitations & Restrictions5 Definitions Index Index Index-2 FE Switch Module User Guide