Hi, We have a Windows 2008R2 DC which is also used as a DHCP server. The users are currently in the same IP range as the DHCP server which is 192.168.1.x. We are in the process of moving our users to a different subnet 10.0.1.x/16. A new VLAN has been created for this purpose on our Nortel switches. DHCP relay has been enabled on the Nortel 5520 and 4550 switches. The test desktops running XP & Windows 7 don't get an IP from the DHCP server although the DHCP server indicates that an IP has been leased to the MAC address of the test desktop. The test desktop is connected through an IP phone which has VLAN tagging. The ports on the switch are tagged with the new VLAN. Is there anything that is being overlooked to get DHCP working for the users on the new subnet?