AP 9115 not joining WLC 9800-CL

[haroon.nazir]

I have 9115 AP and c9800-CL WLC installed on ESXi. My AP is not registering and DTLS tear down error occurred again and again. time is synchronized and i have checked many versions but still no luck 

[*12/24/2021 11:18:43.7820]
[*12/24/2021 11:18:43.7820] CAPWAP State: Discovery
[*12/24/2021 11:18:43.7850] Discovery Request sent to 192.168.10.160, discovery type STATIC_CONFIG(1)
[*12/24/2021 11:18:43.7870] Discovery Request sent to 192.168.10.160, discovery type STATIC_CONFIG(1)
[*12/24/2021 11:18:43.7880] Discovery Request sent to 255.255.255.255, discovery type UNKNOWN(0)
[*12/24/2021 11:18:43.7920] Discovery Response from 10.10.10.10
[*12/24/2021 11:18:43.7920] Discovery Response from 10.10.10.10
[*12/24/2021 11:18:43.7920] Discovery Response from 10.10.10.10
[*12/24/2021 11:18:43.7920] Discovery Response from 10.10.10.10
[*12/24/2021 11:18:53.0000]
[*12/24/2021 11:18:53.0000] CAPWAP State: DTLS Setup
[*12/24/2021 11:19:50.0220]
[*12/24/2021 11:19:50.0220] CAPWAP State: DTLS Teardown
[*12/24/2021 11:19:50.1040] status 'upgrade.sh: Script called with args:[ABORT]'
[*12/24/2021 11:19:50.1440] do ABORT, part2 is active part
[*12/24/2021 11:19:50.1730] status 'upgrade.sh: Cleanup tmp files ...'
[*12/24/2021 11:19:50.1940] Discarding msg CAPWAP_WTP_EVENT_REQUEST(type 9) in CAPWAP state: DTLS Teardown(4).
[*12/24/2021 11:19:50.1940] Discarding msg CAPWAP_WTP_EVENT_REQUEST(type 9) in CAPWAP state: DTLS Teardown(4).
[*12/24/2021 11:19:54.7810] No more AP manager addresses remain..
[*12/24/2021 11:19:54.7810] No valid AP manager found for controller 'WLC' (ip: 10.10.10.10)
[*12/24/2021 11:19:54.7810] Failed to join controller WLC.
[*12/24/2021 11:19:54.7810] Failed to join controller.
[*12/24/2021 11:20:14.7840]

[marce1000]

 - Some suggestions  : 1) is the ap in local mode 2) Is NTP configured and working on the controller 3) Check the controller-logs too when this happens 4) ensure there is a wireless trustpoint created and define it as wireless management trustpoint either by GUI or CLI.

 M.

[Arshad Safrulla]

Did you configure the below

wireless config vwlc-ssc key-size 2048 signature-algo sha256 password 0 1234567890

wireless management interface Gig0 (Set the ap mgmt interface as configured)

!