Cabletron Systems SEH100TX-22 manual Chapter Troubleshooting, Installation Test

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CHAPTER 6

TROUBLESHOOTING

This chapter contains instructions for using LANVIEW LEDs to troubleshoot physical layer network problems.

6.1INSTALLATION TEST

After connecting the SEH to the network, verify that packets pass between all Ethernet devices connected to the SEH and any other devices connected to the network. If there is a problem 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 off, perform each of the following steps until it is on.

a.Check that the 100BASE-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 3, for the pin assignments for twisted pair connectors.

c.For the EPIM-100FX or EPIM-100FMB, check that the TX and RX strands are properly connected.

d.Check the cable for continuity. Several tools are available for this test, depending on the media used.

e.Check that the twisted pair segments or fiber optic segments meet the cable specifications as described in Chapter 3.

SEH100TX User’s Guide

6-1

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Contents 100BASE-T Stackable HUB USER’S Guide Page SEH100TX User’s Guide DOC Notice Cabletron Software Program License Declaration of Conformity Contents Contents Chapter Introduction Using this ManualFollowing conventions are used throughout this document Document ConventionsYour email address Getting HelpRelated Manuals HubSTACK 100BASE-TX HUB with Lanview SEH100TX-22 Chapter SEH Features and OptionsSEH Overview SEH FeaturesRack Mounting Capabilities Stackable CapabilitiesEpim Optional EPIMsHubSTACK Interconnect Cable Requirements Chapter Installation Requirements SpecificationsCable Specifications UTP Cable Speciﬁcations Multimode Fiber Optic Cable Speciﬁcations Class I Network Network Cable LengthsRJ45 Network Port Pinouts Network Port SpecificationsAgency Approvals Operating SpecificationsImmunity Physical SpecificationsSEH100TX User’s Guide Unpacking the SEH Chapter InstallationHubSTACK 100BASE-TX HUB with Lanview SEH100TX-22 Tabletop or Shelf InstallationScrews Strain-Relief Bracket Rackmount InstallationRack Mounting the SEH Powering Up and Stacking the SEH Powering UP and Stacking the SEHStacking SEH Hubs with an Sehi Repeat steps 3 through 6 until all SEH hubs are connected Stacking Unmanaged SEH Hubs Together Installing AN EpimInstalling an Epim SEH100TX User’s Guide Connecting to Network Ports Chapter Connecting to the NetworkConnecting the SEH100TX-22 to the Network SEH Network Ports Connecting to an EPIM-100TXPosition X crossed over RX+ TX+ Position = Not crossed over Nnecting an EPIM-100FX or EPIM-100FMB EPIM-100FX Port Testing the InstallationSEH100TX User’s Guide Installation Test Chapter TroubleshootingUsing Lanview SEH100TX-22 Epim 1 RCV LED Epim 2 RCV LED EPIM-100TX Epim SpecificationsAppendix a Epim Information EPIM-100FX Figure A-3 EPIM-100FMB EPIM-100FMBTable A-2 provides the speciﬁcations for the EPIM-100FMB Numerics IndexIndex-2 SEH100TX User’s Guide Power Supply Cord