Disjoined Heart beat timer expiry Controller

[byahouk]

We received too many errors Disjoined Heart beat timer expiry Controller:

[marce1000]

  - Where are you seeing these messages : Controller , DNAC,.... ?
 - What is the wireless controller model being used + software version ?

 M.

[byahouk]

This message comes to the mointoring tool and you can see it on wlc.

[byahouk]

We reviewed some APs and all of them show the same reason for problem, CAPWAP was lost form Aps, this is reason for AP disjoin, this confirms the problem is WLC did not received control packets and keepalive packets from APs, this is reason for issue.

[marce1000 · Accepted solution]

   - Checkout the overall health of the APs using commands from https://www.cisco.com/c/en/us/support/docs/wireless/catalyst-9800-series-wireless-controllers/217738-monitor-catalyst-9800-kpis-key-performa.html#anc4

    Also have  a checkup of the controller's configuration using the CLI command show tech wireless and feed the output from that into : Wireless Config Analyzer

   M.

[byahouk]

Thanks for the value information.