The DHCP support is not available when you install SQL Server 2005 on a Windows Server 2008 failover cluster
The following pages were recently modified.
Source: Knowledge Base
Product: Microsoft SQL Server 2005 Standard Edition, SQL Server 2005 Enterprise Edition
Notification Contents: New and All Modifications
The DHCP support is not available when you install SQL Server 2005 on a Windows Server 2008 failover cluster
http://support.microsoft.com/kb/945936/en-US