We have a 4402 controller running code 188.8.131.52 - APs periodically lose their A radio. Resetting the AP brings the radio back online, but after a few weeks or so, an AP's A radio will do it again. It's not always the same AP, but there is one particular AP that's had this happen more often than others and it's always just the A radio.
Could this be a bug in the code? Or is this a hardware issue?
I can open a case but thought I'd throw it out on the forum first.
Re: A radio on lightweight APs periodically go down
Sounds like a bug to me... you should upgrade to v184.108.40.206 or v220.127.116.11. Upgrade and see if the problem goes away. Depending on how old your AP's are and if its certain ones, then maybe the AP is going bad.
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Thanks for the quick reply Scott. Working on opening a case with Cisco right now to see. The same AP has done this 3 times in the last few months, but I've seen other APs do it too. Those are also my 2 guesses - either a hardware issue or a code-related issue. Since it's usually the same AP, would lean toward hardware, but just can't be sure yet.
If you have other AP's that are the same model and are not having issues, then most likely its an issue with those AP's. You would see crash files in the flash that can give you an idea of what happened. I would upgrade the code also on the WLC, but make sure your ap's are supported on the code version.
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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