4-4
Troubleshooting
Diagnosing with the LEDs
Troubleshooting
Diagnosing with the LEDs
Table 3-1 shows LED patterns on the switch and the switch modules that
indicate problem conditions.
1. Check in the table for the LED pattern you see on your switch.
2. Refer to the corresponding diagnostic tip on the next few pages.
Table 4-1. LED Error Indicators
LED Pattern Indicating Problems
Diagnostic Tips
Power Fault Self Test Port LED
(in Link view mode)
Off * * *
➊
On Prolonged On Prolonged On *
➋
On Blinking
†
Blinking
†
*
➌
On Blinking
†
Blinking
†
Blinking
†
➍
On Off Off Off with cable
connected
➎
On Off Off On, but the port is not
communicating
➏
* This LED is not important for the diagnosis.
†
The blinking behavior is an on/off cycle once every 1.6 seconds, approximately.
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