How to check / find out the root cause of Link down on SFP Fiber Link
Fiber cable error ? SFP module error ? Why was the Link down?
The link is sharing port. LACP L2 (1:21 and 2:21)
Now the link is up and running.
I didn't see any collisions/congestion/anomalyrxerrors/txerrors on the port
Link State: Active, 1Gbps, full-duplex and AUTO
following is the log
09/25/2015 11:31:22.76 [i] Slot-1: Add port 1:21 to aggregator09/25/2015 11:31:22.72 [i] Slot-1: Port 1:21 link UP at speed 1 Gbps and full-duplex
09/25/2015 11:31:22.15 [i] Slot-1: Remove port 1:21 from aggregator
09/25/2015 11:31:22.14 [i] Slot-1: Port 1:21 is Down, remove from aggregator 1:21
09/25/2015 11:31:22.14 [i] Slot-1: Port 1:21 link down
Appreciate your help.