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DannyMuchmore-0073 avatar image
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DHCP failover and syncing reservations

I am going to configure DHCP failover using a hot standby model. I realize DHCP reservations and static entries when created on the primary DHCP server will be replicated to the hot standby using the powershell DHCP failover auto config upon deployment. What happens to changes made to the original scopes or primary DHCP server after rollout? What changes will not be replicated during this process from the primary DHCP server?

windows-dhcp-dnswindows-server-clustering
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CandyLuo-MSFT avatar image
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CandyLuo-MSFT answered

Hi ,

What happens to changes made to the original scopes or primary DHCP server after rollout? What changes will not be replicated during this process from the primary DHCP server?

I am a bit confused about what you mean, could you please clarify more details?

For Reservations , you can also manually replicate it. Right click IPv4 and select Replicate Failover Scopes.

78470-image.png

However, for server-level configurations, there is no way to sync it. e.g.: server policies and Filters. As a workaround, you can use PowerShell cmdlet to add it:

 Get-DhcpServerv4Filter -List Allow -ComputerName myserver.FQDN | Add-DhcpServerv4Filter -Force

The similar thread has discussed before, you could have a look:

DHCP with failover automatic synchronization issue

syncing dhcp policies between failover hosts

Best Regards,

Candy


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