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Migrating Windows2003-Windows2008 DHCP/DNS - Keep same ip address

Answered Migrating Windows2003-Windows2008 DHCP/DNS - Keep same ip address

  • Monday, February 18, 2013 1:28 PM
     
     
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    Hi All,

    We have a Windows2003 R2 (32bit) domain controller that holds 4 of the 5 FSMO roles, as well as DHCP and DNS.  We will be migrating our domain to Windows2008 soon and I have started to build a baseline, but i'm still a little confused how to complete this baseline. The one task that has me confused is the DHCP migration and how to keep the same ip address for the Windows2008 domain controller (this is important, because all of our edge switches and core infrastructure points to this ip address for various reasons).  Here is what I know I need to do in preparation for the migration:

    * prepare the forest and schema for windows2008

    * transfer all fsmo roles to another domain controller

    * change primary dns ip to the other domain controller (we have 2 domain controllers that have dns active directory integrated)\

    * (DHCP Migration)Here is where my confusion starts. I understand I think how to do the DHCP migration, but i'm not sure if I should first DCPROMO the 2003 DC and remove from Active Directory and change the ip address, then change the windows2008 DC and make the ip address the same as the windows2003, run DC PROMO and promote the Windows2008 member server to a DC, then do the DHCP migration?

    * (OR) - (Fill in the blanks) - This is where I do not know.  I've researched all these articles and i'm still unsure at what point I should do the migration (with the Windows2003 server as a Domain Controller or Member Server) and at what point I can change the ip address of the source windows2008 server:

    http://social.technet.microsoft.com/wiki/contents/articles/7411.step-by-step-migration-dhcp-from-windows-server-2003-to-windows-server-2008-r2-with-windows-server-migration-tools.aspx

    http://social.technet.microsoft.com/Search/en-US?query=dhcp%20migration&ac=8

    - I would greatly appreciate any guidance.  I'm sure there must be other people out there that have been in this same boat and need to keep the same ip address on the Windows2008 domain controllers.

    Thanks,

    Bob

     

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  • Tuesday, February 19, 2013 4:53 AM
     
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    Take a valid backup of DHCP with the netsh

    netsh dhcp server export C:\dhcp.txt all (keep dhcp.txt in a safe place)

    Remove an old DC and Introduce a new DC with the Same Name and IP Address-Ace Fecay(MVP)

    DHCP Migration

    netsh dhcp server export C:\dhcp.txt all
    netsh dhcp server import C:\dhcp.txt all

    Below event should be appear into the new server after completeing the DHCP server.

    (Event has been copied from my test lab:-)

    Event Type: Information
    Event Source: DhcpServer
    Event Category: None
    Event ID: 1044
    Date: 1/20/2011
    Time: 1:18:18 PM
    User: N/A
    Computer: RUMOR
    Description:
    The DHCP/BINL service on the local machine, belonging to the Windows Administrative domain services.corp.contoso.com, has determined that it is authorized to start. It is servicing clients now.
    For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
    Data:
    0000: 00 00 00 00

    Above event is applicable for 2003 and 2008 as well .... .

    1.In addition after promoting the new DC First install the DHCP server service then
    authorize that with enterprise Admin rights.

    2.import the dhcp.txt

    Regards
    Biswajit Biswas
    My Blogs|MCC|TNWiki Ninja

    Best regards Biswajit Biswas Disclaimer: This posting is provided "AS IS" with no warranties or guarantees , and confers no rights. MCP 2003,MCSA 2003, MCSA:M 2003, CCNA, MCTS, Enterprise Admin





     
  • Tuesday, February 19, 2013 7:58 PM
     
     
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    -Thanks for the reply.  I do have that article as part of my baseline. In our situation, the export/import would not be advisable (going from a 32bit windows2003 DC to a windows2008 64bit). I know that I need to do the migration process.  This article is great, but the only DHCP notes here relate to import/export and nothing about the DHCP migration process (see my links in original email). 

    (Question)

    - Do I migrate the DHCP scopes from the windows2003 server when this server is still a Domain Controller and the Windows2008 member server? Then demote the Windows2003 DC and promote the Windows2008 member server (with DHCP installed/migrated)?

     
  • Wednesday, February 20, 2013 3:19 AM
     
     
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    You can migrate the dhcp(export/import via netsh) any server any time.( That can be any server; DC , member server not an issue).

    Export that first and keep that in safe place. Import anytime any server.Just join in domain.

    Regards
    Biswajit Biswas
    My Blogs|MCC|TNWiki Ninja

    Best regards Biswajit Biswas Disclaimer: This posting is provided "AS IS" with no warranties or guarantees , and confers no rights. MCP 2003,MCSA 2003, MCSA:M 2003, CCNA, MCTS, Enterprise Admin


    • Edited by i.biswajith Wednesday, February 20, 2013 3:20 AM
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  • Thursday, February 21, 2013 11:17 AM
     
     
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    From what i've read, going from a 32bit (Windows2003) to a 64BIT (Windows2008) there could be some errors and it's possibe some settings would not get copied over.  Therefore, i'm confident the best method is the migration method. The only questions I have is when I should do the migration process (do I keep the Windows2008 a member server while I do the migration before demoting the Windows2003 DC) 
     
  • Friday, March 01, 2013 8:45 AM
     
     
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    you can run adprep on 64 bit platform(DC) for preparing the schema or run adprep32 on 32 bit platform(DC) for preparing the schema.

    Transitioning a Windows 2003 Domain to Windows 2008 R2 or 2008

    Regards
    Biswajit Biswas
    My Blogs|MCC|TechnetWiki Ninja

    Best regards Biswajit Biswas Disclaimer: This posting is provided "AS IS" with no warranties or guarantees , and confers no rights. MCP 2003,MCSA 2003, MCSA:M 2003, CCNA, MCTS, Enterprise Admin


    • Edited by i.biswajith Friday, March 01, 2013 8:46 AM
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  • Friday, March 01, 2013 9:03 AM
     
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    Hello,

    you already got lots information in http://social.technet.microsoft.com/Forums/en-US/winserverNIS/thread/d96656f9-be01-4130-ba85-1988602b7666/#cac29956-9f5d-4fb9-893c-5a89df689825 which include all steps.

    If you still think that is not enough please add at least the existing thread so everybody can follow the complete story and also everybody is prevented to ask the same already answered questions.

    Keep in mind that all people here doing the forum in there FREE TIME and are not payed for this!!!

    Best regards

    Meinolf Weber
    MVP, MCP, MCTS
    Microsoft MVP - Directory Services
    My Blog: http://msmvps.com/blogs/mweber/

    Disclaimer: This posting is provided AS IS with no warranties or guarantees and confers no rights.

     
  • Friday, March 01, 2013 10:36 AM
     
     
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    Meinolf, I originally posted to this forum and I did not initially know if I posted in the correct forum (i did apologize for posting this twice). I did get great advice and appreciate everyone (including yourself) that took their time and offered me their "free" expertise. I'm sorry if this double post offended anyone. Regards, Bob