Note: move the DHCP failover Windows Server 2012 only supports DHCP IPv4 scopes. If you are using IPv6, most organizations use stateless IP Configuration automatically, where it does not maintain separate lease on the IPv6 address from a DHCP server. In this case the DHCP options defined for each range has the same two stand-alone DHCP server DHCP provide enough HA installation, but unnecessary move DHCP failover.
Configure DHCP Failover in Windows Server 2012:
Configuring DHCP failover on Windows Server 2012 step is very easy to ... ... The first two phases is what you are already familiar with Windows Server 2008 R2 and earlier versions of the same. Here we go!
Using Server Admin, you two new domain the DHCP server role installed on the Windows Server 2012. Allows two DHCP servers in Active Directory.
Use the DHCP management console, configure and start a new DHCP scopes on one of the two DHCP servers.
Using the DHCP Microsoft Management Console, activate DHCP scope again, right-click, and then configure the failover. Action.
Configuring Failover Wizard, click the next button.
Specifying the failover server to use, enter the fully qualified domain name (FQDN) of your second DHCP server, and then click Next.
In the configuration dialog, failover, configure the following settings:
Name: enter a descriptive name for the description of this move DHCP failover, or accept the default.
Maximum Client Lead Time: Specifies the amount of time for which a DHCP lease may be renewed by either failover peer without contacting the other. It also specifies the amount of time that either DHCP server will wait in a “partner down” state before assuming control of the entire IP address range within the scope. ( default = 1 hour ).
Mode: Select Load Balance ( default – Active / Active ) or Hot Standby ( Active / Passive )
Load Balance Percentage: Specifies the percentage of the IP Address range to reserve for each server in the failover relationship. Each server will use their assigned range of addresses prior to assuming control over the entire IP Address range of a scope when the other server transitions into a “partner down” state and the Maximum Client Lead Time ( specified above ) passes.
Auto State Switchover Interval: When selected, specifies the amount of time that elapses before a DHCP Server is automatically transitioned to a “partner down” state when network communication is interrupted to a DHCP Server. If this option is unchecked, an administrator must manually transition the status of a DHCP Server into a “partner down” state using the DHCP Management console or PowerShell. ( when checked, the default = 60 minutes )
Enable Message Authentication: check this checkbox option to enable authentication of failover replication traffic between servers
Shared Secret: Type a “Shared Secret” ( ie., a Password ) to be used to authenticate the failover connection between servers
Click the Next button and then click the finish button.
Confirm that the failover configuration was successful, and then click the close button.
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