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does DHCP data still on two DHCP servers in hot standby mode?

John JY 221 Reputation points
2024-03-20T16:23:50.0266667+00:00

Hi all,

We have 2 windows 2019 DHCP servers which are configured to use hot standby mode. Now, we need to migrate to windows 2022 servers. If we remove the failover relationship between two DHCP servers, will DHCP data still reside on active and passive servers?

Thank you!

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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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. Marcin Policht 23,545 Reputation points MVP
    2024-03-20T16:44:55.6166667+00:00

    As per https://learn.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2012-r2-and-2012/dn338986(v=ws.11)#delete-failover-relationships

    Deleting a failover relationship that has DHCP scopes associated with it will remove those scopes from the partner DHCP server. The scopes will remain on the DHCP server where the failover relationship was deleted.

    hth

    Marcin

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  2. Karlie Weng 18,276 Reputation points Microsoft Vendor
    2024-03-21T03:22:04.3733333+00:00

    Hello,

    As Marcin mentioned, the DHCP scopes that were part of the failover relationship will remain on both the servers. But they will now operate independently. Each server will manage its own scope without synchronizing changes with the former partner server. Any new DHCP leases granted by either server will not be shared with the other server.

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

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