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Co-exsitence of Windows Server 2003r2 and Windows Server 2008r2

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  • Co-exsitence of Windows Server 2003r2 and Windows Server 2008r2

    Hi Members

    I have a scenario as mentioned below

    Existing Environment
    -3 Domain Controllers with Win 2003r2 (Primary Site)

    -1 Domain Controller with Win 2003r2 (DR Site)

    -2 Child domain Controllers with Win 2003r2


    I want to do in place upgradation of the Domain from 2003r2 to 2008r2 without adding any hardware and any downtime to the customers

    AND, I want to know can i keep DC at Parent domain in 2008r2 and DC at Child domain with 2003r2.

    Please provide suggestions!!

  • #2
    Re: Co-exsitence of Windows Server 2003r2 and Windows Server 2008r2

    first do it on PDC after that you may go ahead with the other dcs

    Steps:
    1. Prep your forest and domain. The 2008 R2 prep for has an adprep32 and adprep. Since your current box is x32 you use adprep32.
    2. Install a 2008 R2 member server (this could have also been step 1)
    3. Use dcpromo to promote the 2008 R2 box
    4. By default the 08 dcpromo will make it a global catalog also make it a DNS server and make sure you also configure forwarders and setup zones as needed. (based on what you have on the 2003 boxes)
    5. After the reboot make sure replication is working
    6. Once you are ok with that made sure AD/DNS replication is working (assuming you are using AD integrated DNS) then check sysvol
    7. Transfer FSMO roles to the 2008 box
    8. Make sure clients (static and DHCP) are now also pointing to the bew boxes for DNS
    9. Then when you are ready you can shut the 2003 boxes down or turn of the ports (I always do that to make sure I didn't miss anything). This can be once you have all the 2008 R2 DCs up.
    10. Once you are ok with the 2008 R2 boxes and that everything is working you can run dcpromo and demote the 2003 boxes.
    11. I would personally leave them as member servers and have DHCP run on them, but that can be moved over to the 2008 R2 box too
    12. Once you know you will never need or introduce another 2003 DC then you can raise your domain and forest functional levels to 2008 R2
    13. Enjoy all the cool new features like the AD recycle bin, fine-grained passwords.

    pls check this out, they have a detial steps
    http://networkadminkb.com/KB/a15/tra...s-2008-r2.aspx

    Comment


    • #3
      Re: Co-exsitence of Windows Server 2003r2 and Windows Server 2008r2

      Sure, you can use DC child domain 2003R2 as long as the forest functional level hasn't been raised to 2008 R2

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