replase Server 2008 DC whit Server 2008R2

Hi
I currently have domain with 2 DC running on Server2008, I will upgrade these DC to Server2008 R2. But will keep the same name and IP. Is there a step by step on how to do this?
NoAtMidAsked:
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NoAtMidAuthor Commented:
Hello
Thanks for the links. But seems that the only addresses the way to add new DC, not to replace an existing DC.
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nobusCommented:
sorry, it's all i found
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Joshua GrantomSenior Systems AdministratorCommented:
According to Microsoft, an inline upgrade is supported as long as you are upgrading from Server 2008 64-bit to Server 2008 R2 (which is 64-bit only). I would just take a complete disk backup before trying just in case of failure.

Look at supported in-line upgrade paths -
http://technet.microsoft.com/en-us/library/upgrade-domain-controllers-to-windows-server-2008-r2%28v=ws.10%29.aspx
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NoAtMidAuthor Commented:
I am replacing Win server 2008 X86 whit Win Server 2008 R2. :-(
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Joshua GrantomSenior Systems AdministratorCommented:
Unfortunately that will not be possible. That is changing process architectures.. :( sorry about that.
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NoAtMidAuthor Commented:
But if I run dcpromo on my BDC install a new one with server2008R2 put it into the domain, run dcpromo to add it to the existing forest and domain. Then it will be the new BDC? Then I transfer the roles to it so that it acts as the PDC. then run dcpromo on my old PDC and install a new one with server2008R2 and give the role back?
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Joshua GrantomSenior Systems AdministratorCommented:
Yes you can do it like that. I was just saying that an in-line upgrade was not possible.
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NoAtMidAuthor Commented:
Thanks, Then I will tray to do it like that. Is there something I need to do first? like some commend for adprep?
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Joshua GrantomSenior Systems AdministratorCommented:
You will need to make sure that you demote the appropriate DC from the domain before wiping it and installing 2008 R2, you may need to use different names as well. I would also perform metadata cleanups after each demotion. Its very tricky. I would also make sure that everything is replicated before each step and make sure you have backups of all your DHCP and DNS configurations. I'm assuming your PDC runs DHCP?
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NoAtMidAuthor Commented:
No we run all on static ip. Only DNS on PDC.
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