DHCP Backup and Restore

We have two Window 2003 & 2008 DC. Each DC hosts a DHCP service for a particular subnet.

Can I backup the DHCP database on each subnet and restore it on the other DC in case one of them has problem.

When I restore the DHCP backup file on the other server, will it start the DHCP subnet range automatically ? Do I need to configure anything before it can start ?

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Emmanuel AdebayoConnect With a Mentor Global Windows Infrastructure Engineer - ConsultantCommented:

Yes you can restore the backup but you have to configure your dhcp as  superscope.

A superscope is an administrative feature of Dynamic Host Configuration Protocol (DHCP) servers running Windows Server 2008 that you can create and manage by using the DHCP Microsoft Management Console (MMC) snap-in. By using a superscope, you can group multiple scopes as a single administrative entity. With this feature, a DHCP server can:
• Support DHCP clients on a single physical network segment (such as a single Ethernet LAN segment) where multiple logical IP networks are used. When more than one logical IP network is used on each physical subnet or network, such configurations are often called multinets.

• Support remote DHCP clients located on the far side of DHCP and BOOTP relay agents (where the network on the far side of the relay agent uses multinets).

For more information about superscope, please visit

JaniLSConnect With a Mentor Commented:
Here is a link to backup and restore DHCP database: http://technet.microsoft.com/en-us/library/dd759235.aspx

As for restoring 2008 db to 2003 dhcp server, I found the following TechNet: http://technet.microsoft.com/en-us/library/cc736344(v=WS.10).aspx

"" Notes
• To perform this procedure you must be a member of the Administrators group or the DHCP Administrators group on the DHCP server.

• To open DHCP, click Start, click Settings, click Control Panel, double-click Administrative Tools, and then double-click DHCP.

• Only a DHCP database backed up from the same Windows Server version can be restored. Restoring a DHCP database from a different Windows server version is not supported. To migrate a DHCP database from one Windows Server version to another, use the netsh export/import command.

• Only DHCP databases from the same language version can be restored. For example, a DHCP database from DHCP server running an English language version of the operating system cannot be restored to a DHCP server running a Japanese language version of the operating system.

• To restore the DHCP database, the DHCP service is temporarily stopped. When it is stopped, DHCP clients are unable to contact the DHCP server and obtain IP addresses. ""
AXISHKAuthor Commented:
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