5400 authentication failed || user name : radius-keepalive

[aci_network_test]

Hi Experts , 

We have same autherization policy for all the network switches , But for few devices our access is not working , When we check the logs , we are getting below error but with username : radius-keepalive ...(this is not the actual username ) .

[balaji.bandi]

check below threads : (may help you)

https://community.cisco.com/t5/network-access-control/5400-and-5434-authentication-failed/td-p/3363361

https://community.cisco.com/t5/network-access-control/5400-authentication-failed-windows-10-clients/td-p/4298249