node1 - DNS and DC
node2 - DNS secondary and DC
As you see both should be DCs. And the DNS of course should be same zone, but one of them will be secondary DNS.
As interface for your DNS server add also the one of an Virtual Server.
Gia Betiu
giabetiu@chello.nl
Computer Eng. CNE 4, CNE 5, MCSE Win2K