We actually have tried it in the same place it was before as well as in computer room directly plugged into the network. Even plugged directly to the switch it will only function for a short time then drop.
Sorry I should have put that...We have already got the MAC in a table. As I stated, the AP associates to the controller and after a period of time, it is no longer associated and does not come back. It is currently connected to the network using the Ethernet connection on the Access Point and it will not stay on the network with that connection either.
Clear the config on the AP and reset to factory defaults. Just because you got it from RMA doesn't mean it had not been out before. Then enable your LWAPP debugs and look for discovery traffic and see how the AP registers to the controller. Make sure the bridgegroup name matches as well.
Transferring Crash file from standby: Login to the Active WLC in HA.
From CLI: (Cisco Controller) >transfer upload datatype crash (Cisco
Controller) >transfer upload filename (Cisco
Controller) >transfer upload mode tftp (Cisco Controller) >transfer
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