Could some one PLEASE help me! Statically assigning ip addresses is not an option at this time! I've never seen this before or know anyone who has! We have four schools networked together. Each building has a Zenith Cable Homeworks Universal Modem. We also have a Remodulator and Tranceiver at the cable plant. The cable modems come into the main school and we have a Sonicwall Pro 200 as our DHCP Server and firewall. The router is out side the sonicwall and connects to a T1 line. The router is plugged into the sonicwall, and the sonicwall is plugged into a 3Com switch, the other hubs are on the switch. We are 95+% Imac computers. There is one G4 Server at each school, running appleshare and mac manager.We have static ip addresses on all main equipment. Everything works fine on pcs using DHCP, and static. This problem is effecting the imacs. When I turn the computers on, 4-5 may get an ip address and the others don't. They default to 169.x.x.x and if mac manager is on, they hang before logon for 20 minutes.If mac manager is not on they start up but with out the ip addresses. It isn't the mac manager though, cause I formatted all servers this summer and ran the network with out them or mac manager and still had the same problem. Something is distruping the macs from renewing their ip addresses. If I force it by trashing the tcp/ip preferences, and restart a few times they do get one, but as soon as the lease time expires, its back to the same thing! I can't do this to every machine in four buildings! I've spent all summer trying to figure it out! I have checked apples web site, but nothing seems to apply. All computers have 9.0.4-9.2.2 OS, and all software has been updated, firmware, everything I can think of! I can have two imacs plugged into the same hub, one gets the address and the other does not! The next day they might both get one, or none of them will get one!Its not the same computers every time either. Is there anything on a Cisco 1700 or the SonicWall Pro that would cause this behavior? I have DHCP disabled on our NT server also. Thanks, Fredette