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3-1
Troubleshooting
3
Troubleshooting
This chapter describes how to troubleshoot your Switch 208/224. Note that if
you have a Switch 208/224 Management Module, you can troubleshoot your
switch using software. See the HP AdvanceStack Switch 208/224 Manage-
ment Module Installation and Reference Guide for more information.
This chapter describes the following:
■ solutions to common problems
■ LED error indications
■ diagnostic tests
■ resetting the switch
■ HP Customer Support Services
Solutions to Common Problems
Most problems are caused by the following situations:
■ Incorrect switch-to-switch or switch-to-hub connections. If you
have connected your switch to another switch or a hub by using twisted-
pair cable from an RJ-45 MDI-X connector on your switch to the same type
of connector on the other switch or hub, you must use a crossover cable.
If you have used a straight-through cable, the connection will not work.
The LED for the port you are using will not come on when you connect
the cable.
Use crossover twisted-pair cable for switch-to-switch or switch-to-hub
connections, and straight-through cable for switch-to-end node connec-
tions. See appendix A, “Cables and Connectors” for pinouts and correct
cable wiring for crossover and straight-through twisted-pair cables.
■ Faulty cable or cable is loose. Look for loose or obviously faulty
connections. If they appear to be OK, try a different cable.
■ Non-standard cables. Non-standard and miswired cables may cause
numerous network collisions, and can seriously impair network perfor-
mance. Use a new correctly-wired cable or compare your cable to the
YUMABOOK.BK : 3_troub.fm5 Page 1 Thursday, February 20, 1997 9:35 AM