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what is the right DNS scenario for 4 Local DCs RRS feed

  • Question

  • i ve 4 DCs  i dont get if the dns configuration for each server should be pointing to itself and then to the PDC as sec. dns

    or that they should be pointing to the PDC directly and then to itself as sec .

    or something else !

    thanks in advance ...


    • Edited by Fady Sobhy Monday, August 14, 2017 1:56 PM
    Monday, August 14, 2017 1:51 PM

All replies

  • Hi,

    I would have set one of the DC's (probably PDC) as primary for all DCs, one other DC as secondary, and itself (127.0.0.1) as tertiary. This way all DCs will see the same dns changes at the same time, at the same time always reaching a DNS server.

    However it seems even MS technicians don't agree internally:

    "We in MS have been arguing this amongst ourselves for 11 years now"

    https://blogs.technet.microsoft.com/askds/2010/07/17/friday-mail-sack-saturday-edition/#dnsbest

     


    Best regards, Anders - MCP/CCNP


    Monday, August 14, 2017 2:02 PM
  • If you set the primary DNS as hitself (127.0.0.1) in first, you may have issue when the Domain Controller restart because the AD may not be up and running before the DNS service.  In that case, you may have this warning

    https://support.microsoft.com/en-ca/help/2001093/troubleshoot-dns-event-id-4013-the-dns-server-was-unable-to-load-ad-in

    hth


    This posting is provided AS IS without warranty of any kind

    Monday, August 14, 2017 2:41 PM
  • Hi,

    Based on my understand, if your ip of DCs are a b c d.

    DC a configuration

    preferred DNS server point to a

    DNS server address list point to b c d.

    DC b configuration

    preferred DNS server point to b

    DNS server address list point to a c d.


    To slove the DNS island problem so to configure.

    Best Regards,
    Frank


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    Tuesday, August 15, 2017 7:14 AM
  • Lets make them 2 DCs to ease things

    first DC 1.1.1.1              sec DC 1.1.1.2

    dns  1.1.1.1                    dns  1.1.1.1

    alt dns  1.1.1.2           alt dns  1.1.1.2

    or

    first DC 1.1.1.1              sec DC 1.1.1.2

    dns  1.1.1.1                    dns  1.1.1.2

    alt dns  1.1.1.2           alt dns  1.1.1.1

    or

    first DC 1.1.1.1              sec DC 1.1.1.2

    dns  1.1.1.2                   dns  1.1.1.1

    alt dns  1.1.1.1          alt dns  1.1.1.2

    Wednesday, August 16, 2017 12:39 PM
  • As already mentioned by some members, it is best practice to configure DNS on ADC to point first to PDC and alternate DNS to self 127.0.0.1.
    Wednesday, August 16, 2017 12:58 PM
  • Hi,
    Just checking in to see if the information provided was helpful. Please let us know if you would like further assistance.

    Best Regards,


    Please remember to mark the replies as answers if they help and unmark them if they provide no help.
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    Thursday, August 17, 2017 2:25 AM
  • Hi,

    Was your issue resolved? 

    If you resolved it using our solution, please "mark it as answer" to help other community members find the helpful reply quickly.
    If you resolve it using your own solution, please share your experience and solution here. It will be very beneficial for other community members who have similar questions.
    If no, please reply and tell us the current situation in order to provide further help.

    Best Regards,
    Frank

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    Wednesday, September 6, 2017 7:56 AM