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If you do a sh int statusdoes the SFP module show up correctly? If the gbic is bad, it would not show up at all or state "unknown", etc.interface GigabitEthernet0/1 switchport trunk encapsulation dot1q switchport mode trunkinterface GigabitEthernet2/...
I would look into using Airwave: www.airwave.comNote that Aruba has just bought out AirWave but they still support multiple vendors. Works well for commercial APs but probably not Linksys. Could consider something like ActiveXperts to monitor up/down...