Hi jacksonp it should be changed on both - if you change the MTU to 9000 on the vSwitch it can carry packets of any size up to 9000. It needs to be configured end to end to ensure that size is being used.
John Hague
http://linkedin.com/in/john-hague | twitter @jhague10
VCIX-DCV | VCP-DCV 3/4/5/6 | VCP6-NV | VCP7-CMA | VCAP7-CMA Design
