Folks, we're having some problems with dozens of PowerMac 5260's and system 7.5.5. Basically, these things lose their network connectivity after a few hours on the school's DHCP network and it's a headache. Of course, system 8.1 handles the network just fine, and I think the difference comes down to the Open Transport extensions. The school system doesn't have the licensing for dozens of 8.1 machines, so no quick fix there.
Has anyone encountered problems like this and what can be done about it?