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SRV record registration question RRS feed

  • Question

  • Can someone help me with the following question please.

    I have three Active Directory Sites in the example

    Site A

    Site B

    Site C

    Site-A contains a domain controller DCA which is Read-Write

    Site-B contains a domain controller DCB which is Read-Only

    Site-C does not contain any domain controllers

    DCB has a default configuration meaning Auto Site Coverage is turned off

    HKLM\System\CurrentControlSet\Services\Netlogon\Parameters\ AutoSiteCoverage = 0

    DCB is trying to register SRV records for Site-C, (the site with no DC). However, ‘it should not be’ as it is an RODC and set to ‘not perform automatic site coverage’ as mentioned above.  So why is it trying to register SRV records (like _ldap etc) when it should not be covering for Site-C

    When I run the following command

    NLTest nltest /server:DCB /DsGetSiteCov

    It says DCB ‘is covering site Site-C’ which explains why DCB is trying to register SRV records for Site-C

    However, what I want to know is

    1. Where does NLTest get its information from? DNS or AD

    Logically DCB cannot be looking up DNS ‘to decide’ if it is covering Site-C then registering the SRV records, because if it was it using DNS for this information  (from existing SRV records for example) they 'do not exist yet' as DCB 'has not created them' (which it is not trying to do now).

    Therefore, I am at a loss of where DCB is getting information from, to then decide it is covering for Site-C

    Any help most appreciated

    Thanks

    Friday, July 10, 2020 4:49 PM

All replies

  • Hi,

    Thanks for sharing here!

    From my side ,I would recommend you check if the policy  following was configured in your environment :

    Policy path: 
    System\Net Logon\DC Locator DNS Records

    Best Regards,

    Fan


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

    Monday, July 13, 2020 2:33 AM
  • Hi,

    Welcome to share your current situation.

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

     

    Best Regards,

    Fan

     


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

    Wednesday, July 15, 2020 1:32 AM