I currently have a network with a primary and backup domain controller. For some reason the BDC was made to be the DNS and DHCP server. Both DHCP and DNS are installed on the PDC and DNS on the PDC has been configured. What I would liek to do is make the PDC the primary DHCP server and have the BDC work as the DHCP failover in the event the PDC crashes. Is this as simple as configuring the PDC DHCP with the same settings as the BDC DHCP? Does Windows server somehow know which server to use for DHCP services? Any suggestions are greatly appreciated.