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Troubleshooting 4 - 3
Troubleshooting Using the Port Status LEDs
A blinking Port Status indicator is always a sign that the port detects a
potential problem. Once a port detects a problem, you can further analyze
the problem by counting the number of blinks. Table 4-2 provides
troubleshooting suggestions for each of the blinking sequences.
Table 4-2. Troubleshooting Using the Port Status LEDs
LED State Indication Possible Cause Corrective Action
Off Port Disabled Port disabled. Enable port.
10BASE-FB
Module not
powered up.
Check concentrator
power status.
Reinsert the
10BASE-FB Module.
Broken LED. Press the LED check
button on Controller
Module.
Bad 10BASE-FB
Module.
Replace module.