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Server 2016 - The following Domain Controller could not be contacted "The interface is unknown"

    Question

  • I am in the process of converting the network from 2008R2 AD to 2016 AD.  

    First I did adprep, everything was ok, successful.

    I added the 2016 Server as a Domain Controller, everything is ok.

    Now I'm trying to migrate the FSMO roles over to it, but every time I try.  I get the message when trying to connect to it in "Active Directory Domains and Trust" "could not contact DC the interface is down"

    Or the other message is PDC Emulator is down.

    Thanks in advance, anybody got any ideas?

    or should I call Microsoft for $400?

    Thank You!!!

    Thursday, March 16, 2017 9:28 PM

All replies

  • Did you patch 2016 fully before hand? An unedited ipconfig /all of both may also help.

     

     



    Regards, Dave Patrick ....
    Microsoft Certified Professional
    Microsoft MVP [Windows Server] Datacenter Management

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

    Thursday, March 16, 2017 9:39 PM
  • Hi

     First check necessary ports already accessible between these 2 dc,and you can check this with PortQryUI;

    https://www.microsoft.com/en-us/download/details.aspx?id=24009

    Then run "netdom query fsmo","dcdiag","repadmin /replsum" and share the results for analyse..


    This posting is provided AS IS with no warranties or guarantees,and confers no rights. Best regards Burak Uğur

    Friday, March 17, 2017 6:53 AM
  • Hi,

    Just want to confirm the current situations.

    Please feel free to let us know if you need further assistance.

    Best Regards,

    Alvin Wang


    Please remember to mark the replies as answers if they help.
    If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com.

    Monday, March 20, 2017 8:51 AM
    Moderator