NEW Domain Controller to Replace Old One

After you demote the physical machine, but before you change the new machine , make sure to carefully go through all your DNS zones and delete the references to the IP and Host Name of the demoted machine.  I found that demoting DCs doesn't do a good job of cleaning out DNS.

I'm building a new DC for my network and have a couple of questions.
I currently have 2 DCs, one is a VM (DC1 also FSMO) and the other a physical box (DC2). DC2 is on aging equipment and needs replacing so my plan was to build a new box and create a new DC, but I want to put the IP address from DC2 on the new DC (DC3) so I don't have to change the DNS config on all of my client PCs.
How would you go about this? - I'm thinking, get DC3 up and running (fully configured as a DC) then demote DC2 and decommission it, then change the IP of DC3 to the address that was used by DC2.
It seems a little too easy and I feel like I'm missing something so I thought I'd ask the Spice Heads :)
Thanks
This topic first appeared in the Spiceworks Community

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