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I had the same issue when applying patch ise-patchbundle-2.2.0.470-Patch2-214160.SPA.x86_64.tar.gz to a version 2.2.470 - after that the AD Connector was in "Not running" state and the ISE was waiting for "Waiting up to 300 seconds for lock: APP_STAR...
On "Security -> AP Policies" tick the "Authorize MIC APs against auth-list or AAA"-Box and click "Apply"
In the future, when you want AP's to join this WLC, on "Security -> AP Policies" press the "Add"-Button - and enter the MAC-adress from the AP in...
Hi
We had the same problem - it seems that if the WLC's are in same mobility-group the AP will know the other WLC's IP - and in case of outage for the first WLC they will try to join the other WLC (since they will know the IP from the mobility-group...