DHCP - Reservas de IP - Replicação

Rodrigo R Moraes 25 Reputation points
2024-02-16T21:48:12.19+00:00

Prezados, Tenho o seguinte cenário:

DC01 (primário) e DC02 (secundário) em produção.

Quando eu faço uma reserva de ip na função DHCP em "Reservas" no DC01, ele não replica para o DC02 (nem mesmo esperando 15min ou forçando o gupdate /force).

Ou seja, tudo que eu faço de ajuste na opção de DHCP no DC01, ele não replica para o DC02.

Obs.: tenho o failover de DHCP configurado entre os dois DCs e, até então funcional, se o DC01 cair, o DC02 assume.

Gostaria de entender qual o problema de deplicação dessa questão de reserva de dhcp entre os DCs. Obrigado.

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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Active Directory
Active Directory
A set of directory-based technologies included in Windows Server.
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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 11,005 Reputation points MVP
    2024-02-17T21:51:28.8133333+00:00

    To implement DHCP high availability/failover, follow https://learn.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2012-r2-and-2012/hh831385(v=ws.11) Pls note that, in general, it's not recommended to use domain controllers as DHCP servers, so if you have other servers available in your environment, use those instead. However, the AD functionality and DHCP functionality are, for the most part independent (except for the fact that you have to authorize DHCP servers in AD) hth
    Marcin

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  2. Hania Lian 8,106 Reputation points Microsoft Vendor
    2024-02-20T06:58:45.2+00:00

    Hello, Thank you for posting in Q&A forum. To further troubleshoot this issue, please kindly try below steps: 1.Check if DHCP failover basic configuration is normal. 2.Check if DC Replication is going well by CMD command: repadmin /showrepl Check the outcome and see if there's any insights Event Viewer Logs: Look into the Event Viewer logs on both DC01 and DC02 for any DHCP-related errors or warnings. This can provide valuable information about why the reservations are not replicating. 3.Run CMD command repadmin /syncall to manually start the replication. Best regards, Hania Lian

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