I do have similar issue, DNAC is running with 2.2.3.6 and WLCs(9800) are in HA and running with 17.3.6.
I have discovered 2 different WLCs and facing same issue.
I do have the same problem on 4507 switch.
Below I am sharing the logs from the switch, please advise how can I enable BGP on this.
Uptime for this control processor is 31 weeks, 1 day, 20 hours, 26 minutesSystem returned to ROM by power-onSystem res...