AP disconnected from WLC 5508

Question

Dear All,
Greetings!!!!!
We have WLC 5508 installed in our premises to which 80 1242AG APs are connected. Few days ago, all the APs all of a sudden disconnected from Controller and rejoined after 12 to 15 hours. when we try to investigate, there was regulatory domain conflict occur. But we didn't understand that those APs were configured with the same config before. How come they got diconnected and now rejoined without changing any configration in WLC?
Logs for both AP and WLC has been attahched here.
Kindly guide us!!!                  

Answer 1

Then the APs should of not of disassociated from the WLC. If all these APs are local to where the WLC resides, then I really don't know why the APs would of disassociated. Take a look at the monitor tab and then look at statistics and then ap join. There should be a history unless the WLC was rebooted or the log was cleared. The only other thing I could think of is if there was a duplicate address on a device that had the same IP address as the management interface of the WLC.
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