Jumbo frames reduce the CPU load caused by transferring data. Enable jumbo frames on a VMkernel adapter by changing the maximum transmission units (MTU) of the adapter.


  1. In the vSphere Web Client, navigate to the host.
  2. On the Configure tab, expand Networking and select VMkernel adapters.
  3. Select a VMkernel adapter from the adapter table.
    The properties of the adapter appear.
  4. Click the name of the VMkernel adapter.
  5. Click Edit.
  6. Select NIC settings and set the MTU property to a value greater than 1500.
    You can increase the MTU size up to 9000 bytes.
  7. Click OK.