Troubleshooting DTLS Handshake Error Joining Cisco 2702i Access Point to 9800 Wireless Controller

Recently I tried to join a Cisco 2702i access point to a 9800-CL wireless controller but found an issue that needed to be fixed prior to it joining successfully. I also recently joined a Catalyst 9115 access point right out of the box and experienced no issue at all, so my theory is that the 2702i had config still on it from when it was previously joined to a 5508 WLC. In this post I’ll go through the few steps I took to fix the issue and successfully join the 2702i to the 9800-CL.

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