Hi there, I am doing some experimentation in cloud computing using XEN virtualization. I see the TCP throughput is around 8 Gbits/s in inter-VM communication. I need 10GbitE link between two physical machines. So which emulator should I use. along with the emulator, if you know the supporting tutorial, please suggest me. I have Dell servers with Quad Core Intel ES420 at 2.50 GHz with 8GB RAM. Operating system is Ubuntu 10.4 server edition. thanks and regards -- M P Singh +1 613 422 8074