Table 4-2. Troubleshooting Using the Port Status LEDs
LED State | Indication | Possible Cause | Corrective Action | |
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|
|
|
1 Blink | No Light | Insufficient | Check | |
(continued) | Received | optical power | Module optical power | |
|
| received. | using a light meter. | |
|
|
|
|
|
|
|
|
| Check optical power |
|
|
|
| of remote device. |
|
|
|
|
|
|
|
|
| If optical power levels |
|
|
|
| are OK, check cable; it |
|
|
|
| may be bad or too |
|
|
|
| long. |
|
|
|
| |
|
| Bad remote | Replace remote device. | |
|
| device. |
| |
|
|
|
| |
|
| Bad | Replace module. | |
|
| Module. |
| |
|
|
|
| |
2 Blinks | Port | Bad fiber | Clean and reconnect | |
| Partitioned | connections. | fiber (both ends). | |
|
|
|
| |
|
| Bad remote | Replace remote device. | |
|
| device. |
| |
|
|
|
| |
|
| Broken fiber. | Check and fix RX fiber | |
|
|
|
| link. |
|
|
|
| |
|
| Bad | Replace Module. | |
|
| Module. |
| |
|
|
|
| |
3 Blinks | FIFO error or | Check optical | Verify that optical | |
| MAU jabber | power. | power level is correct. | |
| lockup |
|
|
|
| Bad fiber | Clean and reconnect | ||
| protection | |||
| connections. | TX fiber (both ends). | ||
|
| |||
|
|
|
| |
|
| Broken or | Check and fix RX fiber | |
|
| cracked fiber. | link. | |
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|