DHCP Failover- how does the replication work?

Eduard Martinenko 106 Reputation points
2020-08-20T11:08:52.163+00:00

I have configured DHCP Failover between my two windows servers, that are also domains controllers (the first windows server 2012 and the second one is windows server 2016)
So I have some questions about automatic replication
When you first enabled the DHCP Failover feature all options from this pool are copied on the second server.
But what about the future edits? Will they be copied from the one server to the second?
Or do I have to manually click the synchronize button every time I make any changes to the zone?
How are the conflicts resolved?

Windows Server 2019
Windows Server 2019
A Microsoft server operating system that supports enterprise-level management updated to data storage.
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Windows Server 2016
Windows Server 2016
A Microsoft server operating system that supports enterprise-level management updated to data storage.
2,379 questions
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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Accepted answer
  1. Gloria Gu 3,891 Reputation points
    2020-08-21T03:09:34.67+00:00

    Hi,

    In regards to your issue, here're my suggestions:

    1. When you first enabled the DHCP Failover on the specific scope, all features from this pool are copied on the second server. It includes lease information and scope options.
    2. After my test in the environment, if the client leases are updated in one server, the lease information will be automatically copied to the parterner server.

    However, if the scope options are changed, it will not automatically synchronize，you have to mannually configure Scope replication. This type of replication copies the configuration of a selected DHCP scope to the failover partner server.

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    -------If my answer is helpful to you, please remember to mark them as answer. Thank you!------

    Regards
    Gloria

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  1. TimCerling(ret) 1,156 Reputation points
    2020-08-20T13:01:05.057+00:00

    After you have established which hosts are partners in DHCP failover, updates are automatically replicated. It is not necessary to manually synchronize unless you find some sort of disparity that needs your attention, but generally you will not see any difference between hosts.

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  2. Eduard Martinenko 106 Reputation points
    2020-08-21T07:16:20.927+00:00

    Do the IP reservations get copied automatically?
    What is the difference between "Replicate scope" and "Replicate relationship"?