Freeradius request IP Addres another DHCP Server

Hi, It's possbile the topology bellow: <Client PPPoE> -----------<NAS PPPoE> ------------< Freeradius>--------------<ISC DHCP Server> 1) The client pppoe resquest acess to NAS. 2) The NAS forward request the access to Freeradius. 3) The Freeradius authenticate the client and request the IP Address to ISC DHCP Server 4) The Freeradius response to NAS with fields bellow: