We are using the inline-power function of some WS-C3550-24PWR-EMI to power on some aironet 1230 APs. There are less than 5 APs on one 3550 usually.
For unknown reason, those 3550s keep shutting down those FE interfaces connected by APs. We can do 'no shut' under the interface to re-enable the AP, however those interfaces will be shut down again after several days. We only see this problem on 3550 so far. Can anybody fell free to tell me what the reason is and how to fix it?