> I have just done test with nttctp, i have bad results, around 30mbits/s with > 256k or 3mbits with 64k.. > (cpu limited) on my VM1 (192.168.2.194) I run: vm1> ntttcp -s -m '1,*,192.168.2.200' and on VM2 (192.168.2.200) vm2> ntttcp -r -m '1,*,192.168.2.200' -rb 2M And it tells me I get '149MB/s'. What parameters do you use to test?