Select Pool on URI causing Infinite loop..

My guess is that it is not your iRule that is causing your redirect loop.

 

 

It sounds like the iRule is working as intended, but the application server is not liking something about the incoming request so it is trying to redirect you somewhere else (your suspected single sign on process maybe?).

 

 

There are several ways that you could verify this. But the easiest may be something in the HTTP_RESPONSE Event to log the server response and status code.