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two DCs with DHCP role are unable to communicate with each other

Answered two DCs with DHCP role are unable to communicate with each other

  • Wednesday, March 20, 2013 5:49 AM
     
     
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    Hello Everyone

    We have three domain controllers running Windows Server 2012 in one site. On two of them DHCP role is installed with DHCP Failover.

    After recently installed updates both DHCP+DC role are unable to communicate with each other. (RPC is unavailible) But both can communicate with third DC (w/o DHCP) without any problems. FireWall is off.

     

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  • Wednesday, March 20, 2013 7:02 AM
     
     
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    Can you please post any errors which you see in event viewer ?
     
  • Wednesday, March 20, 2013 7:21 AM
     
     
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    I see few errors in eventlogs. For example, DistributedCOM 10028

    DCOM was unable to communicate with the computer DC2RC.XXXXXXX.com using any of the configured protocols; requested by PID aa0 (C:\Windows\system32\ServerManager.exe).
    I think - this is a consequence, not a cause errors


    The DFS Replication service encountered an error communicating with partner DC2RC for replication group Domain System Volume.

    Partner DNS address: DC2RC.XXXXXXX.com

    Optional data if available:

    Partner WINS Address: DC2RC

    Partner IP Address: xxx.xxx.xxx.xxx

    The service will retry the connection periodically.

    Additional Information:

    Error: 1727 (The remote procedure call failed and did not execute.)

     
  • Wednesday, March 20, 2013 8:02 AM
     
     
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    Hello,

    please assure that firewalls are open according to http://social.technet.microsoft.com/wiki/contents/articles/584.active-directory-replication-over-firewalls.aspx

    Also assure to use ONLY the domain DNS servers on the NIC and none externals like the ISP.

    An unedited ipconfig /all from all DC/DNS servers will give us help to verify the correct settings.

    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.

     
  • Thursday, March 21, 2013 6:43 AM
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    Hi,

    When the File Replication Service(FRS) fails, it could be the deaded "RPC Unavailable" error at work. About how to troubleshoot, please refer to this article:

    How IT Works: Troubleshooting RPC error

    http://technet.microsoft.com/en-us/magazine/2007.07.howitworks.aspx

    And here is a similar issue:

    DFS Replication failed

    http://social.technet.microsoft.com/Forums/en-US/winserverfiles/thread/769c8dee-28dd-4400-a10c-02d4e7b0abfd/

    Hope this helps!

    Regards.

    Vivian Wang
    TechNet Community Support