Cabletron Systems SEH-32, SEH-34, SEH-24 manual Chapter Troubleshooting, Installation CHECK-OUT

TROUBLESHOOTING

CHAPTER 5

TROUBLESHOOTING

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

5.1INSTALLATION CHECK-OUT

After you connect 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 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/EPIM-F3 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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