AP disjoins and joins the WLC frequently

[shahinmadambi585]

Access Points disjoins and joins the WLC frequently. It's a new AP 

here are the logs that were observed.

%CAPWAPAC_SMGR_TRACE_MESSAGE-5-AP_JOIN_DISJOIN:  Chassis 1 R0/0: wncd: AP Event: Session-IP: *************************** CAPWAP DTLS session closed for AP, cause: DTLS server session shutdown

WLC Code - 17.3.3
AP Model - AIR-AP2802E-B-K9

[Kasun Bandara]

check if this hits your WLC

https://quickview.cloudapps.cisco.com/quickview/bug/CSCvt24635

[Rich R]

CSCvt24635 was fixed in 17.3.1 so shouldn't be that.

Agreed with @marce1000 - start by upgrading to TAC recommended release.

https://www.cisco.com/c/en/us/support/docs/wireless/catalyst-9800-series-wireless-controllers/214749-tac-recommended-ios-xe-builds-for-wirele.html#anc13

[marce1000]

 - Go for current  recommended release : https://software.cisco.com/download/home/286316412/type/282046477/release/Amsterdam-17.3.5a (too)

 M.