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DHCP Server

Thiago Alcantara 1 Reputation point
2020-08-06T18:55:04.17+00:00

Hi guys, I'd like some help about dhcp server.

Let's go to the scenario:
1 month ago, we had 02 DC servers with the following characteristics: ServerA (ADDS, DHCP, DNS) and ServerB (ADDS, DNS). As we needed to perform a repair on ServerA, we made a redundancy of the DHCP services to ServerB through "Configure Failover", with that we had the same services that ran on ServerA also on ServerB. Everything running through ServerB perfectly. After the repair we made on ServerA, we want to return the DHCP service on it. Unfortunately we made the mistake of not backing up ServerA's DHCP settings before sending it in for repair. Is there a way to do the reverse failover, that is, to make ServerB replicate the settings to ServerA?

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. Frank Morrison 1 Reputation point
    2020-08-06T21:11:11.477+00:00

    Fundamentally yes. If I'm not mistaken, I believe you can promote ServerB to become the main DHCP/ADDS authority for your domain, then add in ServerA (which you should rename to "ServerC" to ensure there is no confusion in the DNS) and replicate it back into there. Unless there is a reason you want ServerB to remain the backup/failover.

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  2. Gloria Gu 3,896 Reputation points
    2020-08-07T06:21:06.087+00:00

    Hi John,

    In regards to your issue, I want to confirm what's your failover mode? Is your DHCP servers depoly Hot standby mode, B active and A standby?

    When configuring failover, some specific setting of DHCP won't be replicated to the failover partner. If you want to replicate Server B's setting to Server A totally, you can try to migrate DHCP from B to A. In this situation, the configuration of DHCP server will be replicated to another DHCP server.

    For more details about migration, you can refer to the following link:
    https://learn.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2012-r2-and-2012/dn495425(v=ws.11)

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

    Best regards,
    Gloria

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