Hardware Diagnostic Tests; Testing The Switch By Resetting It; Testing Twisted-Pair Cabling - HP ProCurve 2124 Install Manual

Hardware Diagnostic Tests

Testing the Switch by Resetting It

If you believe that the switch is not operating correctly, you can reset the
switch to test its circuitry and operating code. To reset a switch, either:
I Unplug and plug in the power cord (power cycling)
Press the reset button on the front of the switch
I
Power cycling the switch and pressing the Reset button both cause the switch
to perform its power-on self-test, which could resolve any temporary opera-
tional problems.
Checking the Switch LEDs
The self-test passes if the Fault LED on the front of the switch goes off after
approximately 3 seconds. If this LED stays on longer than 10 seconds or begins
blinking, an error condition has been detected on the switch.
See "Diagnosing with the LEDs" on page 3-3 for information on interpreting
the LED patterns.

Testing Twisted-Pair Cabling

Network cables that fail to provide a link or provide an unreliable link between
the switch and the connected network device may not be compatible with the
IEEE 802.3 10Base-T or 100Base-TX standards. The twisted-pair cables
attached to the Switch 2124 must be compatible with the appropriate stan-
dards. To verify that your cable is compatible with these standards, use a
qualified cable test device.
HP also offers a wire testing service. Contact your HP-authorized LAN dealer
or your local HP sales office for more information.
Troubleshooting
Hardware Diagnostic Tests
3-5