DHCP / Class ID question

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There currently exists a DHCP servicing the physical network. I want to
create a virtual subnet on the physical network and it appears that User
Classes is the way for me to go, so all of the computers in my workgroup
will grab an IP address from my server and everybody else in the building
will grab an IP address from theirs.

Using the default configuration of a Windows 2003 DHCP server, if a
workstation comes on and has a user class configured with the server ignore
the DHCP service request? In other words, as long as I add the user class
using

Ipconfig /setclassid ?Local Area Connection? portable

on all of my machines is that all that needs to be done? Or does the other
server have to be configured to exclude any machine with that class string?


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