3-1
Trouble
shooting
3
Troubleshooting
This chapter describes how to troubleshoot your HP 10/100 hub. This chapter
describes the following:
■
basic troubleshooting tips
■
diagnosing with the LEDs
■
Hardware Diagnostic tests
■
HP Customer Support Services
Basic Troubleshooting Tips
Most problems are caused by the following situations:
■
Incorrect hub-to-switch or hub-to-hub connections.
Check your
cable type.
•
When connecting an MDI-X device such as a hub or most switches,
use a crossover cable. You can also use Port 1 and press the MDI
button.
•
When connecting an MDI-X device to an MDI device, use a straight-
through cable.
Most switch and hub ports are wired as MDI-X ports, so for these hub-to-
hub or hub-to-switch connections, use a crossover cable. LAN adapters
in end nodes are normally wired as MDI ports as are some ports on hubs
and switches. For connections from the hub to these MDI ports, use a
straight-through cable. See Appendix B, “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.
Roadhw0.bk : ROADHW3.FM Page 1 Thursday, May 28, 1998 5:40 PM
