AD DNS Failover

Handian Sudianto 4,096 Reputation points


if we have 3 DNS server running on Domain Controller server with IP :

Then i have an application which required authentication to AD LDAP, now the application pointing to and with this condition if server is down so the authentication will be failed.

I have scenario to change LDAP pointing from using our domain name (, if we nslookup will contains all 3 domain controller IP.

Now i just want to know if down, can DNS give IP address to other running server?

So when the app query the DNS reply with ip or

Windows Server
Windows Server
A family of Microsoft server operating systems that support enterprise-level management, data storage, applications, and communications.
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A set of directory-based technologies included in Windows Server.
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  1. Daisy Zhou 18,701 Reputation points Microsoft Vendor

    Hello Handian Sudianto,

    Thank you for posting in Q&A forum.

    You had better set the application pointing to three DNS servers, and and if possible.

    I think this application might find 3 IP addresses through domain name resolution, but it may not know that the other 2 IP addresses are also the DNS addresses of the application itself (if you only set the application pointing to only one DNS server instead of pointing to three DNS servers).

    I suggest you can test in your lab and check if down, can DNS give IP address to other two running servers ( and

    Hope the information above is helpful. If you have any question or concern, please feel free to let us know.

    Best Regards,
    Daisy Zhou


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