HP 24S Betriebsanweisung PDF herunterladen (Seite 49)

Diagnosing With the LEDs

LED patterns indicating problems

Diagnostic Tips

Power Collision Fault Port

OFF * * *

Check power cord and power source. If OK,

replace the hub.

Very

frequent,

or solidly

Very frequent collisions could indicate a

network fault or a cable not properly

terminated, or SQE test not disabled. If link

beat is not enabled on unused twisted-pair

ports, crosstalk may be causing the problem.

**ON*

A hub hardware failure was detected during

self-test. Replace the hub.

Flashing Flashing

A port has been auto-segmented because of too

many collisions on a ThinLAN port not properly

terminated or not connected. Check cable

terminations, connections, SQE test setting,

transceivers, and attached network devices.

**OFF

OFF or

flashing

intermit-

tently

on a

port in

use

Check cabling on the port indicated.

Use the Status console command to check if:

– The port has been manually turned off.

In this case, turn the port back on.

– Link beat is expected but not detected

(link beat missing). In this case, be sure

cable is plugged in and check link beat

settings. See “Link Beat” in chapter 1.

Use the console’s Linkbeat command to

turn link beat on or off.

* This LED is not important for the diagnosis.

Troubleshooting 4-3

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