Windows 2012 DHCP Failover 3 Servers Topology

Question

_{Sunday, November 20, 2016 6:15 AM}

Dear Experts!

Can anyone enlighten me about DHCP Fail-over that how we can configure Windows Server 2012 Fail-over based on 3 Servers topology.

My client asked me to create Windows DHCP Fail-over with 3 Servers. in their case we need to configure server in hot standby mode.

Mean that Server 2 is standby for Server 1. Server 3 is Standby for Server 2.

Please tell me if this is possible. Also I need some guidelines to do so.

Thanks.

All replies (1)

_{Sunday, November 20, 2016 7:55 AM ✅Answered}

A DHCP Failover replication is established between 2 DHCP Servers only.  All DHCP scope that are in this failover replication cannot be configured with another failover replication.

ex: You have 3 Servers (DHCP01 - DHCP02 - DHCP03) and you have 3 scopes (10.0.1.0/24 - 10.0.2.0/24 - 10.0.3.0/24)

Suppose you wan to replicate Scopes 10.0.1.0/24 between DHCP01 and DHCP02, you will not be able to create another failover replication between DHCP02 and DHCP03 with the same scope (10.0.1.0/24).

What you could do instead is to put half of DHCP scopes on DHCP01 and the other half on DHCP02 and then, both DHCP01 and 02 will replicate their scopes with DHCP03.  So DHCP03 will be a backup for all DHCP scopes.

hth

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