HP 24S Uživatelská příručka stáhnout pdf (Strana 47)

Troubleshooting

Some of the hub console commands are used for the troubleshooting instructions in this

chapter. See “Console Connection” in chapter 2 for details on connecting to the console

port. See chapter 3, “Operation”, for details on the console commands.

This chapter describes these topics:

basic troubleshooting tips

diagnosing with the LEDs

diagnostic tests:

– testing the hub only

– testing the hub’s ports and the links

– testing twisted-pair cabling

Basic Troubleshooting Tips

Make sure that you have a valid network topology. If you have trouble after a

recent change to the network, switch back to the previous topology. If you no

longer have trouble, the new topology is probably at fault. Topology faults may be

due to excessive cable lengths or excessive repeater delays between nodes. For

configuration guidelines, see the HP EtherTwist Technical Reference Guide

(part number 5091-3237E).

Make sure that the hub is plugged in and that cable connections are secure.

If the ThinLAN port is being used, make sure that the port is properly

terminated. See “ThinLAN Port Connection” in chapter 2.

Troubleshooting 4-1

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HP 24S Uživatelská příručka Strana 47