We have Core switch 6506 with 2 Line Module of 16 Port GBIC in each and 2 SUP 2.
Now the proble is : Today morning 4 Port goes in to errordisable state. Logs shows that it is due to Unidirectional link.
I have checked fiber patch cord , fiber core and also GBIC ( also changed ). But the same problem is there as i enable it again enters in errordisable state.
than I have shifted them to another module port with same GBIC and same Fiber core. All link are working now.
So what could be the problem......?? I suspect to be the problem of Hardware in perticular Port. If so than what could be the remedy .......... ??? What should be the steps to avoind this prob. in future.???
Pls guide me .......