Multiple Home Server for authentication

Hi to all. I'm tryng to use Freeradius 2.x for managing a complex architecture. I use the 802.1x standard for wireless authentication. I need to authenticate users that have passwords in different authentication server whit different protocol (TTLS/PAP or PEAP/MSCHAPv2) and i'd want to proxy the requests tryng to authenticate in first auth server and more if the auth fails. Can I get this feature simply listing home servers in home_server_pool module in proxy.conf file? Thanks to all Regards. -- Rosario L.