Cisco ISE - RADIUS Authentication

[M Talha]

Hi All,

I am currently testing (ISE 3.3 patch 4) behind F5 load balancer and able to successfully authenticate TACACS request. Although when I am trying to authenticate endpoints for RADIUS, receiving getting below logs. Currently in the production environment (ISE 2.7) is running smoothly. Should I need to check and specific thing to get this RADIUS authentication issue sorted ?

1.

2.

[MHM Cisco World]

I will send you some points to check 

Thanks for waiting 

MHM

[Flavio Miranda]

@M Talha 

 How is your ISE deployment? It is one box or multiple box?

If multiple, you may face issue when the F5 load balance the traffic and send the traffic to a new box and not the one that started the process with the end point device.

 If that is the case, you need check NAT config on the LB and you may need Virtual server for IP Forwarding 

On this link below you will find all the information you need.

https://community.cisco.com/t5/security-knowledge-base/how-to-cisco-amp-f5-deployment-guide-ise-load-balancing-using/ta-p/3631159