Table of Contents
Advertisement
Troubleshooting
Diagnostic Tests
If you have an HP AdvanceStack 8U/16U SNMP Module installed into the
hub, the ASCII console provides tests and indicators that can be used to
monitor the hub and its network connections. See the documentation shipped
with the HP AdvanceStack 8U/16U SNMP Module and the console's online
Help system for more details about these tests and indicators.
Testing the Hub Only
If you believe that the hub is not operating correctly, you can test the hub's
circuitry by resetting the hub through one of these procedures:
Each of these procedures will power-cycle the hub and execute its self-test.
If all of the Port LEDs stay on after 3 seconds, the hub may have failed its
self-test. See "Diagnosing with the LEDs" earlier in this chapter to interpret
the LED display.
C a u t i o n
Cycling power on the hub will temporarily disable the network and
could have other adverse effects.
Testing Twisted-Pair Cabling
The twisted-pair cable attached to the hub must be compatible with the
IEEE 802.3 Type 10Base-T standard. To verify that your cable is compatible
with this standard, you can use the HP J2263A Cable Test Set. The older HP
28687A Wire Test Instrument can also be used. HP also offers a wire testing
service. Contact your HP-authorized LAN dealer or your local HP sales office
for more information.
2-8
Unplug the ac adapter from the hub and plug the ac adapter into the
hub again.
If an HP AdvanceStack 8U/16U SNMP Module is installed, select the
"Reset" option from the ASCII console or press the Reset button on
the module..
Hide quick links:
Advertisement
Table of Contents
Troubleshooting
