All wireless APs are running on same channel 161

[S-SAL]

I am getting below logs in the WLC, and as I checked, all APs are showing channel 161. It maybe because these APs are located near airport and experiencing radar interference.

I have attached a few config screenshots where I deselected DFS channels . But APs are staying on 161 even its not selected.

All APs are connected to the same local WLC 5508 running (SW Version 8.0.121.0).

*RRM-CLNT-5_0: Mar 06 10:32:22.341: #RRM-3-RRM_LOGMSG: [PA] rrmLrad.c:2619 RRM LOG: Airewave Director: Could not get valid local channel for 802.11a slot 1
*RRM-CLNT-5_0: Mar 06 10:32:22.341: #LOG-3-Q_IND: [PA] rrmChanUtils.c:559 RRM LOG: Airewave Director No channel is available for 50:06:04:1a:1b:80 on slot:1. Disable the radio for non occupancy period.
*RRM-CLNT-5_0: Mar 06 10:32:22.341: #RRM-3-RRM_LOGMSG: [PA] rrmChanUtils.c:559 RRM LOG: Airewave Director No channel is available for 50:06:04:1a:1b:80 on slot:1. Disable the radio for non occupancy period.
*RRM-CLNT-5_0: Mar 06 10:32:13.140: #RRM-3-RRM_LOGMSG: [PA] rrmLrad.c:2619 RRM LOG: Airewave Director: Could not get valid local channel for 802.11a slot 1
*RRM-CLNT-5_0: Mar 06 10:32:13.141: #LOG-3-Q_IND: [PA] rrmChanUtils.c:559 RRM LOG: Airewave Director No channel is available for 24:01:c7:87:71:80 on slot:1. Disable the radio for non occupancy period.
*RRM-CLNT-5_0: Mar 06 10:32:13.140: #RRM-3-RRM_LOGMSG: [PA] rrmChanUtils.c:559 RRM LOG: Airewave Director No channel is available for 24:01:c7:87:71:80 on slot:1. Disable the radio for non occupancy period.
*RRM-DCLNT-5_0: Mar 06 10:32:05.562: #RRM-3-RRM_LOGMSG: [PA] rrmLrad.c:2619 RRM LOG: Airewave Director: Could not get valid local channel for 802.11a slot 1
*RRM-DCLNT-5_0: Mar 06 10:32:05.562: #LOG-3-Q_IND: [PA] rrmChanUtils.c:559 RRM LOG: Airewave Director No channel is available for f0:29:29:c3:4a:00 on slot:1. Disable the radio for non occupancy period.
*RRM-DCLNT-5_0: Mar 06 10:32:05.562: #RRM-3-RRM_LOGMSG: [PA] rrmChanUtils.c:559 RRM LOG: Airewave Director No channel is available for f0:29:29:c3:4a:00 on slot:1. Disable the radio for non occupancy period.

*RRM-CLNT-5_0: Mar 06 10:30:07.983: #RRM-3-RRM_LOGMSG: [PA] rrmClientProc.c:691 RRM LOG: Airewave Director: Unable to set channel 0[20] on the on AP 24:01:C7:87:71:A0(1)
*RRM-CLNT-5_0: Mar 06 10:30:07.983: #RRM-3-RRM_LOGMSG: [PA] rrmChanUtils.c:617 RRM LOG: Attempt to set invalid channel 0 on AP 24:01:C7:87:71:A0(1)
*RRM-CLNT-5_0: Mar 06 10:30:07.982: #RRM-3-RRM_LOGMSG: [PA] rrmClientProc.c:691 RRM LOG: Airewave Director: Unable to set channel 0[20] on the on AP 50:06:04:1A:0C:C0(1)
*RRM-CLNT-5_0: Mar 06 10:30:07.982: #RRM-3-RRM_LOGMSG: [PA] rrmChanUtils.c:617 RRM LOG: Attempt to set invalid channel 0 on AP 50:06:04:1A:0C:C0(1)
*RRM-CLNT-5_0: Mar 06 10:30:07.981: #RRM-3-RRM_LOGMSG: [PA] rrmClientProc.c:691 RRM LOG: Airewave Director: Unable to set channel 0[20] on the on AP 50:06:04:1A:0E:60(1)
*RRM-CLNT-5_0: Mar 06 10:30:07.981: #RRM-3-RRM_LOGMSG: [PA] rrmChanUtils.c:617 RRM LOG: Attempt to set invalid channel 0 on AP 50:06:04:1A:0E:60(1)
*RRM-CLNT-5_0: Mar 06 10:30:07.981: #RRM-3-RRM_LOGMSG: [PA] rrmClientProc.c:691 RRM LOG: Airewave Director: Unable to set channel 0[20] on the on AP 50:06:04:1A:0E:E0(1)
*RRM-CLNT-5_0: Mar 06 10:30:07.981: #RRM-3-RRM_LOGMSG: [PA] rrmChanUtils.c:617 RRM LOG: Attempt to set invalid channel 0 on AP 50:06:04:1A:0E:E0(1)

[marce1000]

                     - FYI : https://bst.cloudapps.cisco.com/bugsearch/bug/CSCuz01947

         Go for the latest/last release for the 5508 being advertised in https://www.cisco.com/c/en/us/support/docs/wireless/wireless-lan-controller-software/200046-tac-recommended-aireos.html               ==>  https://software.cisco.com/download/specialrelease/2702eede2b47a5c3bb40795bbe836af6

                                             And check if that can help , 

 M.

[S-SAL]

The bug you mentioned , states only to check the operational status.
But in my case , the APs are stuck with channel 161. even I did not select DFS channels , only channels 36-40-44-48 are selected.

Then why APs select channel 161. maybe the RRM settings are somehow not active. OR the APs are following any other settings for channel selection?

[marce1000]

 - Following your arguments is it important to go for the last/latest supported release anyway on the 5508  because of the fact that the platform is old and being out phased  : any subsequent behavior should (kind of finally) be evaluated against :
                 https://software.cisco.com/download/specialrelease/2702eede2b47a5c3bb40795bbe836af6
                                     Last but not least because  8.0.121.0 is very old

 M.
                                   

[Max Jobs]

Hello SAL,

The logs you provided indicate that there are issues with setting the channels for the APs due to interference or invalid channel configurations. Since the APs are staying on channel 161, it's possible that they are experiencing radar interference, as you mentioned, which is preventing them from selecting a different channel.

[Rich R]

Hard to say without seeing your whole config. Use the Config Analyzer (link below) to check your config.

RF profiles will override the global settings - do you have a RF profile assigned and what's in that RF profile?

https://content.cisco.com/chapter.sjs?uri=/searchable/chapter/content/en/us/td/docs/wireless/controller/technotes/8-1/mobility_express/b_RRM_White_Paper/b_RRM_White_Paper_chapter_0111.html.xml
https://www.cisco.com/c/en/us/td/docs/wireless/controller/technotes/8-1/HDX-DG/b_hdx_dg_final/m_high_density_experience_features_added_to_80.html#topic_EDF1F4D4FDCD4C3D9DE1F058B96270FA
https://www.cisco.com/c/en/us/td/docs/wireless/controller/8-0/configuration-guide/b_cg80/b_cg80_chapter_011000.html#rf-profiles

[pieterh]

@marce1000  's advice to use latest released software version and debug from there is a thing place to start
there may be bugs in your version and it has no point in investigating this old version anymore

-----------------------
if the problem remains after the upgrade you can perform some checks below

I recall these WLC uses different level of settings which can be override at a "lower" level

first there is global level  
next you have access point group level 
and individual access point level

actual assigned channels can also be limited based on country-codes enabled in the WLC
here also global level and lower levels
and the country code of the access point itself
- the result is the least of allowed channels in a country and enabled channels in the WLC 

your screenshot of DCA channels seems to be the global level
-> this can explain the difference in expected and the operational channels 
     (the global settings are overridden at a lower level)

=> first I'd suggest to check the country code matches that of your access points
    and no country code has recently been modified/added accidentally