topic Dear Sandeep, Still the issue in Wireless

802.11 a/n radio flapping on Cisco 1522 AP >>>%DOT11-6-DFS_TRIGGERED <<<

sreelalggbm — Mon, 05 Jul 2021 07:25:44 GMT

Hai,

I have a wireless network with 4 1552 out door AP. All are RAP and connected to the network.2 of the AP a/n radio is going flapping continously... When I connected AP console, I got the below error

: %DOT11-6-DFS_TRIGGERED: DFS: triggered on frequency 5805 MHz

:adj_Maint: received go quiet indication.

:adj_Maint: Ignoring go quiet, this is a RAP.

: %LINK-5-CHANGED: Interface Dot11Radio1, changed state to administratively down

: %LINEPROTO-5-UPDOWN: Line protocol on Interface Dot11Radio1, changed state to down

This appears when When radar is detected on a channel ..

My WLC code is 7.4

How we can fix this sissue ?? Thanking everyone in advance

DFS which is to detect radar

Scott Fella — Fri, 14 Mar 2014 11:55:57 GMT

DFS which is to detect radar and go off channel is implemented in uni-2 channels.... What you can do is only use uni-1 or uni-3 channels which you would define in your RAP.

https://supportforums.cisco.com/document/52376/tpc-and-dfs-overview

Dear Scot, Thanks a lot for

sreelalggbm — Sun, 16 Mar 2014 06:14:33 GMT

Dear Scot,

Thanks a lot for yourresponse

Thease are the channels enabled on DCA channel list 36,40,44,48,52,56,60,64.

But I can see the APs connected with channel161,100,104..I tried to delete this channels and WLC couldnt find the channel list.

How we can enable use uni-1 or uni-3 channels in WLC..Unii 2 channels are already disabled

Waiting for your reply

Thanks and Regards

Sree

HI ,Agree with scott: you

Sandeep Choudhary — Sun, 16 Mar 2014 12:29:14 GMT

HI ,

Agree with scott: you must select UNI-1 and uni-3 channels if any kind of radar detected.

On the 5ghz you are restricted with channels that exist with radar. You can disable the DFS channels so that AP's don't use these

How to disable :

1. you can try statically assigning channels for those APs.

http://www.cisco.com/c/en/us/td/docs/wireless/controller/5-2/configuration/guide/Controller52CG/c52rrm.html

2. Normally DCA globally set to freeze. set it to auto and then went into each AP that was on a UNI2 channel and set it to custom, then save it.

3.Try to disable the A/N network. Make sure the 52-64 aren't in the list, and then reenable the A/N network.

Hope it helps.

Regards

Dont forget to rate helpful posts

Dear Sandeep,Thanks a lot for

sreelalggbm — Tue, 18 Mar 2014 07:17:52 GMT

Dear Sandeep,

Thanks a lot for your advice..I have reconfigured the channel list for 802.11 a/n

This is my current DCA channel list

The channels in UNII-1 36, 40, 44, 48,

The channels in UNII-3 149, 153, 157, 161

I will monitor it and update you the status ASAP

Regards

Sree

Dear Sandeep, Still the issue

sreelalggbm — Wed, 19 Mar 2014 09:50:41 GMT

Dear Sandeep,

Still the issue is not solved..I am facing the same on one of the AP..