AP1131 won't show up after WLC upgrade

[forrestermu]

Hi,

I just upgraded WLC 4402 from 5.2 to 6.0, but after reboot, I can see all the AP's are "downloading" software, and then all gone, they won't show up any more.

Please help!

[forrestermu]

Message: Invalid Configuration detected by XML

Controller time base status - Controller is out of sync with the central timebase...

[Leo Laohoo]

Check the time of your WLC, it may not have sync-ed with an NTP source.

Set the correct time or NTP source and check again.

[Vinay Saini]

Please check at the AP console for debugs. Enable "debug capwap client events" on AP

Also make sure , you have capwap ports open .

Thanks

Vinay

[forrestermu]

Ok now. I added a new IP scope last week, and all APs received new ip addresses from this new scope - different subnet from managment-port.