On 5/13/14, 2:00 AM, Yinpeijun wrote: > if needed, we should increase PYH NIC MTU or decrease VM NIC MTU ? Increase the physical NIC MTU to 1550; this will be more compatible since the VMs will be able to use standard 1500 MTU. Be sure the physical switches have jumbo frames enabled. -- Wes Felter IBM Research - Austin