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Troubleshooting
Diagnosing with the LEDs
Troubleshooting
Diagnosing with the LEDs
Table 5-1 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 5-1. LED Error Indicators
LED Pattern Indicating Problems
Diag
Tips
Power Fault PS Tmp Test
Fan
Status
Port LED
(in Link view mode)
Off with
power cord
plugged in
*PS LED off
or blinking
orange
*** *
➊
On Prolonged On * * Prolonged
On
**
➋
On Blinking
†
**Blinking
†
**
➌
On Blinking
†
* * Off Blinking
†
*
➍
On Blinking
†
**Blinking
†
* Blinking
†
➎
On Off * * Off * Off with cable
connected
➏
On Off * * Off * On, but the port is
not
communicating
➐
On Blinking Blinking * Off * *
➑
On Blinking * Blinking Off * *
➒
* This LED is not important for the diagnosis.
†
The blinking behavior is an on/off cycle once every 1.6 seconds, approximately.