I need to develop a LAN Simulator for 1000 host and implement rpc service on every host.Hw can i do it in java

I need to develop a LAN Simulator for 1000 host and implement rpc service on every host.How can i do it in java?I have already studied and worked on NS2 but i cannot incoporate rpc protocol/service into it.Can someone help me with it?

download microsoft virtual server, then get some trail copies of windows 2003. Set up some virtual environments, then play