I am in the process of upgrading my domain controllers. I currently have DC1 (2008R2 on physical hardware with all FSMO roles on it and dhcp server) and DC2 ( 2008r2, virtual on VMware 5.5).
I am planning on putting up a 2016 VM and promoting it to a DC, called DC3. Then I would demote DC2, make sure AD replicates and no meta data left from DC2, then take vm DC2 off the domain. Create a new 2016 VM, give it same ip and server name of DC2 and then promote the server to a domain controller (called DC2)
Is this proper/safe procedure? I would ideally like to keep same ip and name if there is no risk involved.