Freeradius with DHCP

Hi, As I can see there is DHCP support in the Freeradius since 2.0.4. I'd like to know how can I get it working? Which DHCP server can cooperate with freeradius? What have I modify in freeradius? The radius currently only authenticates wireless stations, and collects accounting infos. Freeradius version is 2.1.6 (Centos built rpm) DHCP-server "Internet Systems Consortium DHCP Server V3.0.5-RedHat" (also Centos binary) thanks kako