I am observing CRC/FCS errors (together with Recv-err) on 2960S on ports connected to ALCOMA radios (1gbps ethernet link). The strange thing is I have the same radios connected to another cisco switches (2960G, 3560G, 2960) and there is no such problem. We tried to install a 3560G between the radio and 2960S and the problem disappeared.
Currently we have 5 2960S with the same problem.
It looks like the ports on 2960S are somewhat different. Now I don't know who is the bad boy. Cisco or ALCOMA? Any hints what to do now?