Hello ... I have 2 radius servers a and b
 
A -> Authentication
B -> Accounting
 
What I am trying to do it have each server be a backup for each other
 
so primary authentication (A) has a backup of B
primary accounting (B) has a backup of A
 
I have configured these but what is happening is that request for accounting / authentication are being distributed among both servers ... I only want requests to be sent to the backup server if the main is down ...
 
any ideas how to do this?