topic Re: DTLS session closed for AP, cause: DTLS server session error in Wireless

DTLS session closed for AP, cause: DTLS server session error

annah1 — Tue, 01 Aug 2023 15:23:43 GMT

Hello ,

I have several APs getting dropped from wlc 9800 ( version : 17.3.6 ) with the error message : DTLS session closed for AP, cause: DTLS server session error

could you please advise what could be the problem

Re: DTLS session closed for AP, cause: DTLS server session error

Mark Elsen — Tue, 01 Aug 2023 18:38:11 GMT

- Have a checkup of the 9800 controller configuration with the CLI command show tech wireless ; feed the output into : https://cway.cisco.com/wireless-config-analyzer/
Do this first!

Further on use these tools for troubleshooting AP join issues :
https://logadvisor.cisco.com/logadvisor/wireless/9800/9800APJoin

Re: DTLS session closed for AP, cause: DTLS server session error

annah1 — Tue, 01 Aug 2023 20:58:33 GMT

Thank you @Mark Elsen for your feedback , i tried to upload the file to https://cway.cisco.com/wireless-config-analyzer/ , but i got the same initial page ( see attachement ) .

the file is in txt format .

Re: DTLS session closed for AP, cause: DTLS server session error

Mark Elsen — Wed, 02 Aug 2023 05:53:22 GMT

- It should work , remember to use the CLI command show tech wireless ; not simple show tech

Re: DTLS session closed for AP, cause: DTLS server session error

Rich R — Thu, 03 Aug 2023 00:34:07 GMT

And think about upgrading to 17.9.4.