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auto switch between two conditionel forwarders

MOUNTADAR, Issam 116 Reputation points
2022-11-24T14:12:03.397+00:00

Hello Team,

we had an issue a few weeks back regarding a link to a webpage of a client, after checking i found out that we have two conditionel forwards configured, so i changed the order to have the second one in the first place, and then the link was reachable.

i want to know if there is way to switch automatically between the two conditional forwarders in case one of them is not resolving.

thank you in advanced

Windows DHCP
Windows DHCP
Windows: A family of Microsoft operating systems that run across personal computers, tablets, laptops, phones, internet of things devices, self-contained mixed reality headsets, large collaboration screens, and other devices.DHCP: Dynamic Host Configuration Protocol (DHCP). A communications protocol that lets network administrators manage centrally and automate the assignment of Internet Protocol (IP) addresses in an organization's network.
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  1. Hania Lian 20,756 Reputation points Microsoft Vendor
    2022-11-28T06:58:33.603+00:00

    Hi.
    By default, client queries the DNS server.The DNS server immediately forwards the query to its first conditional forwarder. After <forwarder_timeout> seconds, if the first conditional forwarder does not reply, the DNS server queries the second conditional forwarder, and so on.
    Refer to this document for details:
    https://learn.microsoft.com/en-us/troubleshoot/windows-server/networking/forwarders-resolution-timeouts
    So I think that there is a high probability that conditional forwarders cannot be automatically switched. You can only switch manually.

    Hope the information is helpful.

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    If the Answer is helpful, please click "Accept Answer" and upvote it.

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  2. MOUNTADAR, Issam 116 Reputation points
    2022-11-29T13:18:18.037+00:00

    Hello Hania,

    Thank you for your reply, i was check the documentation you sent me, i have another question i cant find the RecursionTimeout (in the registry) in our DNS server (the local dns server wiche uses the two conditional forwarders), is it normal ?

    Thank you

    BR

  3. MOUNTADAR, Issam 116 Reputation points
    2022-11-30T13:05:38.24+00:00

    Hello Hania,

    We are using a windows server 2019, and i cant find recursion in the registry.

    BR

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