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Cisco Wireless AP's not talking to controllers

Phoenix43
Phoenix43 used Ask the Experts™
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I have a site in my organization that has had working cisco 1200 series AP's and 4000 series controllers. The infrastructure until yesterday was working fine.. Now the controllers are refusing connection to the AP's.

No network changes made.
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this sounds like someone forgot to wr mem on config changes and the controllers lost power or were rebooted... or a connectivity change somewhere - what is the setting on conf reg in the controller
Can you post sh runs of your devices -- excluding security related information of course -

Is there any information in the logs of the device(s)? If so please post any relevant errors.

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I am not able to shoot the logs to you at this time.. I know why its doing what its doing. Just not sure why its not recovering..I will send you the error messages