https://community.cisco.com/t5/endpoint-security/5400-authentication-failed-user-name-radius-keepalive/m-p/4597943#M6829 <P>Hi Experts ,&nbsp;</P><P>&nbsp;</P><P>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 ) .</P><P>&nbsp;</P><P>&nbsp;</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="ISE issue1.PNG" style="width: 696px;"><img src="https://community.cisco.com/t5/image/serverpage/image-id/149625i38CBAD0EB8E61EFD/image-size/large?v=v2&amp;px=999" role="button" title="ISE issue1.PNG" alt="ISE issue1.PNG" /></span></P> Fri, 22 Apr 2022 14:53:23 GMT aci_network_test 2022-04-22T14:53:23Z https://community.cisco.com/t5/endpoint-security/5400-authentication-failed-user-name-radius-keepalive/m-p/4597943#M6829 <P>Hi Experts ,&nbsp;</P><P>&nbsp;</P><P>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 ) .</P><P>&nbsp;</P><P>&nbsp;</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="ISE issue1.PNG" style="width: 696px;"><img src="https://community.cisco.com/t5/image/serverpage/image-id/149625i38CBAD0EB8E61EFD/image-size/large?v=v2&amp;px=999" role="button" title="ISE issue1.PNG" alt="ISE issue1.PNG" /></span></P> Fri, 22 Apr 2022 14:53:23 GMT https://community.cisco.com/t5/endpoint-security/5400-authentication-failed-user-name-radius-keepalive/m-p/4597943#M6829 aci_network_test 2022-04-22T14:53:23Z https://community.cisco.com/t5/endpoint-security/5400-authentication-failed-user-name-radius-keepalive/m-p/4597960#M6830 <P>check below threads : (may help you)</P> <P>&nbsp;</P> <P><A href="https://community.cisco.com/t5/network-access-control/5400-and-5434-authentication-failed/td-p/3363361" target="_blank">https://community.cisco.com/t5/network-access-control/5400-and-5434-authentication-failed/td-p/3363361</A></P> <P><A href="https://community.cisco.com/t5/network-access-control/5400-authentication-failed-windows-10-clients/td-p/4298249" target="_blank">https://community.cisco.com/t5/network-access-control/5400-authentication-failed-windows-10-clients/td-p/4298249</A></P> Fri, 22 Apr 2022 15:19:09 GMT https://community.cisco.com/t5/endpoint-security/5400-authentication-failed-user-name-radius-keepalive/m-p/4597960#M6830 balaji.bandi 2022-04-22T15:19:09Z