You got probs ;D only joking. Right if your router has a DCHP which I think it will let that do the hard work. disable the dchp on the unix and win2k server as this will conflict. More that likely you will use a hub with the router to clients which is fine. The job is easy enough from there on.
I recently had to run to servers on one network one is a router and other is a software server and it works.
let me know how you go