Radio reset due to (56) Radio channel set

[Edu]

I have some access points that were with this message
"Radio reset due to (56) Radio channel set"
They were working with DCA best, after I switched to 20MHz the problem stopped occurring.
this problem only happened with the 5GHz radio.
Has anyone seen something like this, or a bug for this case?

[HaifengLi]

The following log is helpful for further analysis.

show inventory
show flash crash
show flash cores
show logging

[Edu]

I attached a file with the commands.

[HaifengLi]

It looks like EXPECTED_RADIO_RESET, it may be caused by RRM.
You can try increase the DCA interval or disable EDRRM to see if symptoms improve.

[Edu]

Hi
I made some test and I would like to share that information with you.
I changed  my RF Profile 5GHz / RRM / DCA of Best to 20Mhz and after that works fine.
one thing it's strange that before the upgrade version of the WLC to 8.5.151.0 these problems didn't happen.

[marce1000]

 - Elaborate on your wireless environment too, standalone , controller based ,controller model(s) ,ap model(s) , and or include used software version(s) on the mentioned platform(s)

 M.

[marce1000]

 - According to the document referenced below it could be due to flaky up-links for the AP(s)

 https://www.cisco.com/c/en/us/support/docs/wireless/aironet-3700-series/117869-technote-ap-00.html

 M.