We have 2 FSM726 switches linking 2 offices via a fibre cable. The network went down and the problem seems to be down to one of the switches. It previously worked fine for 6 months. The fibre has been checked and is currently back up running on old kit.
The web based menu on switch A does not show any GBIC modules plugged in. We have changed the port config from Auto to GBIC amongst other methods to get it to work.
Eventually we had the switch replaced but the replacement switch does exactly the same thing.
Switch B does indicate a GBIC module is installed (The port shows as Blue for 'Training' on the web based config). To confuse matters, we have also just discovered that Switch B shows the GBIC port as Blue even if no module is installed.
Any ideas would be greatly appreciated.