Robust Authentication Proxying

[Philip Molter]

Hi,

I'm trying to setup a robust RADIUS authentication proxy.  All this  
radius will do is proxy all auth requests to a set of four backend  
RADIUS handlers.  I have a 2.1.6 server that I've configured with four  
home_server entries and one home_server_pool that load-balances across  
the four.  It works when all four backends are up, but if any 1 of the  
backend goes down, then requests that get directed to that backend  
result in an Access-Reject packet being returned to the NAS.  Is there  
a way to configure freeradius so that instead of returning an Access- 
Reject packet, the server will instead switch to the next configured  
server and retry the request there?  It may mean that it takes a  
little longer for the request to be handled, but that's better than it  
being rejected.

Thanks for any advice or assistance.

Philip