http://blogs.technet.com/b/winserverperformance/archive/2010/02/02/increase-vmbus-buffer-sizes-to-increase-network-throughput-to-guest-vms.aspxUnder load, the default buffer size used the by the virtual switch may provide inadequate buffer and result in packet loss. We recommend increasing the VM bus receive buffer from 1Mb to 2Mb. Traffic jams happen every day, all across the world. Tooen-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)