Can I change an AD server's IP address easily?

Can I just change an IP address of a AD server easily?

I set up a new AD server that is running DHCP and DNS to replace an aging server, but I want to clean up the IP addressing. Here's what I have:

Aging server IP:  192.168.3.2
New server IP:    192.168.3.3

So I set up the new server while the aging server was still running, but now the new server is handling DHCP and DNS requests, it's time to retire the old server. Once I demote the old server and retire it, can I just reassign the new server's IP address to the old one and give it the .2 address? Or is there something else I have to do to change addresses for an AD server?
jumpassociatesAsked:
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Wayne88Commented:
Will you be demoting the old DC?  I am assuming there will only be one DC after this.  Since the new server is handling DHCP and DNS requests then I wouldn't worry with the ipconfig /flushdns to clear the local DNS resolver or run ipconfig /registerdns to ensure the new IP address is registered by the DNS server.  This should be done already if the new server have been running for some time.

Run dcdiag /fix which will update Service Principal Name (SPN) records and check all the tests are passed.
jumpassociatesAuthor Commented:
Sorry, to clarify, I already have 1 other DC running...let's call that,  .1

So I'm trying to retire a 2nd DC (.2) and replacing it with a new DC (.3), but now I want to change .3's IP address to .2 and just wanted to know what the proper steps are for that.
Wayne88Commented:
So DC1 is the DNS and DHCP server.  I can't think of anything else you may have to do to DC3 other than to demote it.  Prior to demoting it just turn it off to see if any problem but I can't think of anything else.  Anyone?
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jumpassociatesAuthor Commented:
What I'm wondering is after I retire DC2, can I take DC3 (which is already assigned a .3 address) and just change it to .2 and assume it will work fine? Any harm in doing so?
Wayne88Commented:
I don't see the problem of the new DC taking over the IP address of the previous one but I am strictly talking about DC role.  I cannot speak for anything else the server may be hosting (e.g. 3rd party app) on the old server because the requirements may be different.
MichelangeloConsultantCommented:
Prior to demotion make sure to transfer any FSMO roles the DC you're trying to demote may have, demote the DC and double check that any reference to that DC has been deleted from NTDS objects in Sites and Services and in AD DNS. Also make sure to properly change DNS entries in network connections so that the old DC is not referenced.

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jumpassociatesAuthor Commented:
Thanks for the help!
MichelangeloConsultantCommented:
Glad to have helped, may i suggest you mark answer https://#a42553443 as Assisted Solution too.
jumpassociatesAuthor Commented:
yeah, I would have liked, but I could only give credit to one answer, unfortunately. I know it says I can do multiple, but it didn't quite let me.

Forgive me, its been years since I last logged in here, so I couldn't see it too easily.
Wayne88Commented:
You can select multiple solutions or have admin fix it but no biggie. Cheers!
Wayne88Commented:
Thanks Scott and jumpassociates!
MichelangeloConsultantCommented:
And myself does not get some love

:)
Wayne88Commented:
....and Michelangelo
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