Welcome to Cisco Support Community. We would love to have your feedback.
For an introduction to the new site, click here. If you'd prefer to explore, try our test area to get started. And see here for current known issues.
what is the source interface/address the controller uses to communicate with RADIUS server?. can i change it ?
i am waiting for your kind support
As far as I know it is MGMT interface or dynamic interface (only if radius server is in the same vlan). I think there is no option to change this behevior.