WLAN AP 2702i Line protocol goes up and down

[Gehrig_W]

Hello Cisco WLAN Experts,

we are running 2702i-APs on 9800-WLC SW-Level 17.9.3 which show abnormal behaviour in putting line protcol on

Dot11Radio0- and Dot11Radio2 interfaces state down/up an a regular basis of 15 minutes:

The shown radio reset codes are 27 and 10.

Our Prime 3.10 is reporting "Radio administratively up and operationally down" for these APs.

I can see no channel changes happening.

DCA interval is 10 Minutes . FRA interval is 1 Hour.

What might be the reason for this malbehavour ?

How can I dig deeper into this ?

Please check and thank You for any good hints.

Kind regards

Win

[marce1000]

                             >.....The shown radio reset codes are 27 and 10.
  - Ref : https://www.cisco.com/c/en/us/support/docs/wireless/aironet-3700-series/117869-technote-ap-00.html

10

RADIO_FC_TX_INPROG

The driver attempts to free a packet that the radio still has in progress

27

RADIO_FC_NDP_STUCK

--not used--

            - Probably not to meaningful ; if it happens exactly every 15 minutes I suspect an external cause ; examine the wireless traffic at those intervals (e.g.) or                   'just examine the wireless traffic'

  Advised : Have  a checkup of the 9800-WLC configuration with the CLI command show tech wireless ;
feed the output into : https://cway.cisco.com/wireless-config-analyzer/

 M.

[Gehrig_W]

Hello Marce1000,

Thank You for Your reply. It looks like You are pointing to an outdated radio reset code table.

I'm using this one

https://www.cisco.com/c/en/us/td/docs/wireless/access_point/tech-notes/ap-radio-reset-codes.html

10  RADIO_RC_IDB_RESET Radio interface reset.

27 RADIO_RC_IDB_SHUTDOWN Radio interface has been shutdown.

Looks like these reflect the correct Reset Codes and Radio Reset Reasons.

Kind regards

Wini

[marce1000]

  - Well it depends on how you look at it ; 'my document' says :
                      >....Updated:May 9, 2023
   Yours only has : Updated:December 7, 2020...

  - Anyway probably not too important w.r.t your issue , 

 M.

[Gehrig_W]

You are right, Your document was recently updated but it references an old SW-release at the beginning:

This article pertains to Cisco IOS® APs running 8.5.135.0 / 15.3(3)JF8 and earlier. 

My document is elder but for newer SW-Releases:

In 8.5.140.0 / 15.3(3)JF9 and later, the Radio Reset Codes were changed; see the article Cisco Access Point Radio Reset Code Reference for the current behavior.

Kind regards

Wini

Older and cooler