I am looking for advice or guidance...here is my scenario:
I have a single domain, 5 total sites. I have 6 domain controllers-2 Server 2003R2 servers in main site running DNS. 1 of these servers also runs DHCP, is the main print server and holds all FSMO roles except PDC emulator. 2 sites have 2003R2 servers (all dcs are GCs) with DNS, DHCP and 2 have 2008R2 servers running the same.
I want to replace the main server which runs DHCP and DNS in the main site with new hardware running 2008R2 and reuse the IP address. The domain and forest are prepped as I already have 2 dcs running 2008.
Does anyone know of the steps required to re-use the IP address of the main 2003 server for the new 2008R2 server and eventually have it hold all roles, run DHCP and be the secondary DNS server for the remote sites running DNS?
To preempt, I would seize all roles to the secondary dc running 2003 first before installing the new server and demoting the main 2003 dc. I would then dcpromo the new server running 2008R2 and transfer the roles there.
Ultimately I need to replace all 2003R2 servers with new hardware running 2008R2.
I appreciate any input.