SCCM PXE/WDS with Remote DHCP Server

Add the following DHCP Scope Options:

060   PXEClient

066   IP Address of WDS Server

067   bootx86wdsnbp.com

These are required steps if your DHCP Server is on a different subnet than your SCCM/WDS/PXE Server.

Here is a good KB Article on this subject – http://support.microsoft.com/default.aspx/kb/926172 and http://technet.microsoft.com/en-us/library/cc732351.aspx