Channel 48 - WLC 5520

[wifi1]

Hi all

I have an issue where I am unable to remove channel 48 under the RF-profile and at the moment I am statically assigning channels to APs inside this group (as channel 48 is causing interference with a third party system).

When I try and remove the channel I just receive an error stating "Invalid channel or channel cannot be removed"

Has anyone come across this issue before? Any input would be a great help.

Currently running 2x5520 WLC in SSO mode on OS version 8.10.162.0

Thank you,

[Flavio Miranda]

Hi

 Which is the channel width are you using?  If you have 40Mhz channel, which means two channel bonding , You may have to delete both channels.

[wifi1]

Hi Flavio

Yes I am using 40mhz bonding. So I should need to delete 48 and 52?

I’ll give that a try 

thanks

[Flavio Miranda]

 That´s correct.

[wifi1]

Hi Flavio.

This still does not work for me unfortunately - do you have any other suggestions?

(WLC) >show rf-profile details 5g-production

DCA Channel List................................. 48,56,60,64,100,104,108,112,116,120,124,128,132
DCA Bandwidth.................................... 20

(WLC) >config rf-profile channel delete 48 5g-production
Invalid channel or channel cannot be removed.

Globally all channels are enabled and 20MHz channel width.

Thanks,

[Flavio Miranda · Accepted solution]

There are some bug with similar behavior. Probably you hit a bug.  I´d try to change the WLC version cause this should work.

Just for test, did you tried to delete another channel?

[wifi1]

Hi

I was thinking that it could well be some bug - I can delete any channel except for channel 48.

Thanks

[michael18]

I came across this post while investigating a similar issue. I found the solution to this via TAC. I thought i'd chare in case anyone else has this problem.

Wireless > 802.11a > RRM > DCA, just check "Avoid check for non-DFS channel" and then remove the channel.

After I enabled the above check box I was able to go back to RF profile and remove channel 48. I then went to the above check box and disabled it again. This solved the problem.