Additional DC Not Working When Main DC Is Offline

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    Hi All,

    I have the following situation:

    Domain xxx.local

    Active Directory Master ( – Windows Server 2003 R2 32-Bit

    Additional DC ( – Windows Server 2008 32-Bit (not R2 release)

    I performed a dcpromo on DC2 to create the additional DC for the domain xxx.local and all went through fine.

    Replication is being done between DC1 and DC2

    However, I’ve tested trying to run only on DC2 in case DC1 is down – disable DC1’s NIC.

    As soon as I’ve done this, AD on DC2 fails stating it can’t contact the AD for Domain xxx.local.

    When I re-enable NIC on DC1 – AD on DC2 is up again.

    Did I mess up somewhere?

    Is there any specific changes to be made to DNS settings? While DCPROMOTING DC2, I stuck with default settings and checked Global Catalog and DNS.

    Thanks for any replies.


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