Hello, I hope someone can help with this. we have 2 buidings that were recently connected by lasers. The lasers are connected to thier respective switches in each bulding. Building 1's laser is connected to a 6509 switch running catos software Version NmpSW: 6.4(21) Through gbics. Building 2's Laser is connected to a 4505 switch running software IOS Version 12.2(25) gbics. Since these buildings were connected we have been experiencing intermittent drops in connection 2-3 times an hour. Both switch ports are enabled Full-duplex. During a show tech these errors are reported:
The 6509 switch shows FCS-Err 81
I have been told that this is a fiber problem. Could it also be that the 6509 catos needs to be updated?