How to create a virtual network for an application

Question

I'm creating a simple p2p application. To test this I'd like to be able to simulate a simple network of about 2-3 computers, such that each instance of the application thinks its on a different computer and talking with others over the network. I considered qemu, but haven't managed to get networking working using VDE or TUN/TAP. is their any other solution?

Answer 1

You might have better luck using VMs running on something like Virtual PC (Sun's Virtual Box is another good alternative).