I would like to help a school who is having problems in a mixed Mac and Windows environment (mostly Mac workstations with a handful of Windows XP workstations). One of the problems appears to be the proliferation of DHCP servers. For example, they have a Mac server (running ancient Mac OS 8.6) that acts as the primary DHCP server. They also have a DHCP server available on their Windows server, the DSL router, the SonicWALL firewall box, and at least two or three other wireless routers (both Linksys and Mac Airport) scattered around the school. I have turned off DHCP on all devices except the Mac Server, but I'm still getting mixed results. I wonder if I should choose a "higher order" device, like the SonicWALL box to act as the sole DHCP server? And that way, when I eventually turn on VPN services, the SonicWALL will be able to handle those requests also? Does anyone have any tips or insight into the best way to implement DHCP in such a mixed environment?