Radius COA/POD with SNAT

Hi,

 

We have deployed a BIG-IP LTM as a Radius proxy with SNAT enabled to hide the NAS from the back end Radius server, and it has been working well for the typical Radius traffic. However, there is a plan to implement Radius COA/POD while keeping the SNAT config intact. I was thinking about using an irule to have a session table which will be looked up to correlate the COA packets with the source NAT, but we are pretty concerned with the potential performance impact. Are there any alternative scenario/configuration to achieve this?

 

Thanks.

 

Adit