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Troubleshooting A-1
Appendix A: Troubleshooting
Diagnosing Hub Indicators
The Fast EtherHub-12se can be easily monitored through its comprehensive
panel indicators. These indicators assist the network manager in identifying
problems the hub may encounter. This section describes common problems
you may encounter and possible solutions.
Symptom: Power indicator does not light up.
Cause: Defective power supply or Power LED.
Solution: Have your unit’s power supply or Power LED replaced. Ask for
dealer assistance.
Symptom: Partition indicator lights up.
Cause: Hub has partitioned a port.
Solution: If port partitioning has occurred, the hub will automatically enable
the port when the faulty condition disappears.
Symptom: Link/Traffic indicator remains unlit.
Cause: Workstation’s network adapter, cable or hub port is defective.
Solution: The most common cause is a defective network adapter or cable
connection. Check the corresponding cable connections, or the
workstation’s network adapter for possible defects. Verify that the
correct cable type is being used. Replace the defective cable or
adapter.
Use 100W Category 5 STP or UTP cable for RJ-45
connections and 50/125 or 62.5/125
mm multimode cable for fiber
optic connections.
Use the diagnostic procedures described in Chapter 2 and the following section
to verify that all other system components are functioning properly. If you still
cannot resolve the problem, contact your Accton distributor for assistance.