Working on a project to migrate all services on an existing Windows 2000 AD server to Windows 2003. The existing 2000 server is running all the AD roles plus DHCP. I successfully did all the role migrations and DNS so the 2003 server is now what I will call the "primary" controller - but I have not yet demoted the 2000 server. My DHCP migration attempt involved exporting and saving the existing DHCP database using the DHCP Export Import utility. I stopped the DHCP server on the 2000 server, did the export, saved it and imported it to the new 2003 server using "netsh dhcp server import c:\dhcpdatabase.txt all". I then authorized the DHCP server on the 2003 box.
The issue is that the 2003 server does not issue IP leases. The client error indicates that a DHCP server could not be contacted. Starting, restarting the services did not help. I validated all the scope and option settings are correct. The 2000 server has it's DHCP service disabled.
Two things of note:
The 2000 server has not been demoted or even rebooted since I moved all the FSMO roles.
If the DHCP service is re-started on the 2000 server - IP's are once again issued. And both DHCP services show as up and Authorized...