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Upgrading from Windows Server 2008 to 2012. RRS feed

  • Question

  • Dear Members,

    We are planning to upgrade our old server to new one. The new server is Dell T430 Server with 32GB RAM.

    Presently, we are running on Windows Server 2008 Standard Edition. with 50 users.

    We want to upgrade our AD to Windows server 2012 into a new Server.

    is there any way to upgrade our server without making any changes to all clients? (Domain Name, Gateway(IP of Domain))??

    Tuesday, August 11, 2015 11:44 AM

Answers

  • So, you want to replace the existing server (2008 Standard) with a new box running Server 2012 and as a domain controller?

    The domain part is easy.  Just add the new server as an additional domain controller in your existing forest/domain.  Then remove the old server from the domain and bump your forest and domain levels up to 2012.

    Make sure that the new server is also the GC (Global Catalog) server, and find instructions for moving FSMO roles over to the new server before you decommission the old one.

    As far as addressing, if you're using the DC also as your DHCP server, you'll have to recreate (or migrate) DHCP to the new server.  The gateway address should stay the same, but make sure the clients are getting the new server address as their main DNS server.

    That's all very high-level, un-detailed, I know.  But I hope it gives you a good idea of what you'll need to research further before progressing.

    Kevin


    Kevin Remde US DX - IT Pro Evangelism - Microsoft Corporation http://aka.ms/FullofIT http://twitter.com/kevinremde


    • Edited by Kevin Remde Friday, August 14, 2015 1:54 PM
    • Proposed as answer by Kevin Remde Friday, August 14, 2015 1:54 PM
    • Marked as answer by Kevin Remde Monday, August 17, 2015 3:19 PM
    Friday, August 14, 2015 1:54 PM

All replies

  • So, you want to replace the existing server (2008 Standard) with a new box running Server 2012 and as a domain controller?

    The domain part is easy.  Just add the new server as an additional domain controller in your existing forest/domain.  Then remove the old server from the domain and bump your forest and domain levels up to 2012.

    Make sure that the new server is also the GC (Global Catalog) server, and find instructions for moving FSMO roles over to the new server before you decommission the old one.

    As far as addressing, if you're using the DC also as your DHCP server, you'll have to recreate (or migrate) DHCP to the new server.  The gateway address should stay the same, but make sure the clients are getting the new server address as their main DNS server.

    That's all very high-level, un-detailed, I know.  But I hope it gives you a good idea of what you'll need to research further before progressing.

    Kevin


    Kevin Remde US DX - IT Pro Evangelism - Microsoft Corporation http://aka.ms/FullofIT http://twitter.com/kevinremde


    • Edited by Kevin Remde Friday, August 14, 2015 1:54 PM
    • Proposed as answer by Kevin Remde Friday, August 14, 2015 1:54 PM
    • Marked as answer by Kevin Remde Monday, August 17, 2015 3:19 PM
    Friday, August 14, 2015 1:54 PM
  • Kevin,

    Thanks for giving road map. Pls. review below details:

    Old Server: Windows Server 2008 32 Bit

    New Server: Windows Server 2012 Standard 64 Bit.

    I have followed the given steps and checked with 2 DCs. I also confirmed that New Server showing as GC.

    The problem is I need to ran both servers. Without it All client Pcs(OS XP) shows error while user logon.

    Pls. help.

    Br,

    Bhavin.<html:div data-url="https://social.technet.microsoft.com/Forums/en-US/fc218a6f-a2fe-4948-8361-4fab763a235d/upgrading-from-windows-server-2008-to-2012?forum=itmanager" id="link64_adl_tabid" style="display:none;">44</html:div>

    Saturday, August 22, 2015 9:34 AM
  • Can you be more specific about the error they're getting? 

    Also, can you tell me which machine is providing DHCP?  I suspect that perhaps it's either DHCP or DNS that needs to be adjusted.


    Kevin Remde US DX - IT Pro Evangelism - Microsoft Corporation http://aka.ms/FullofIT http://twitter.com/kevinremde


    • Edited by Kevin Remde Saturday, August 22, 2015 12:23 PM
    Saturday, August 22, 2015 12:22 PM
  • Kevin,

    My DC is running on Local Static IP, like. 10.10.10.203, 255.255.255.0, 10.10.10.203.

    My DNS is also running on the same Local IP in Old Server.

    The new Server named EDPSERVER.IJ.COM (IJ.com) is my domain, is already a member of the domain.

    I just want to transfer Domain Controller.  and All Client PCs configs should remain the same.

    Br,

    Bhavin.

    Saturday, January 9, 2016 4:11 AM
  • Okay.. both servers are DCs now, right? 

    Where are your clients getting their addressing?  What server or device is doing DHCP for your network? 

    If you want to eventually shut down or re-purpose your 2008 server, you're going to want to remove it from the domain first.  But before you do that we should be able to get things working so that even when that machine is turned off your clients will be fully using the new server.


    Kevin Remde US DX - IT Pro Evangelism - Microsoft Corporation http://aka.ms/FullofIT http://twitter.com/kevinremde


    • Edited by Kevin Remde Monday, January 11, 2016 2:25 PM
    Monday, January 11, 2016 2:25 PM
  • Thanks Kevin,

    We have very simple Network Setup.

    Win Server 2008 has a local IP e.g. 10.*.*.203 (working as DomainController).

    All clients PC has same range of IP with Gateway to Server.

    Problem is i cannot migrate with suggested steps because my server edition is 32 bit and it cannot be upgraded itself to R2. I have already added new server to the domain.

    New server has also the local IP like 10.*.*.204 with gateway to old server IP

    New server has also another network which contains DHCP. But in my domain case, no DHCP comes into the picture.

    I just want to transfer AD to new one so that I can take back the old server.

    Br,

    Bhavin.

    Friday, January 22, 2016 3:43 AM