Enable Jumbo Frames on a vSphere Distributed Switch

Enable jumbo frames for the entire traffic that passes through a vSphere Distributed Switch.

Important: When you change the MTU size of a vSphere Distributed Switch, the physical NICs that are assigned as uplinks are brought down and up again. This causes a short network outage of between 5 to 10 milliseconds for virtual machines or services that are using the uplinks.

Procedure

1. In the vSphere Web Client, navigate to the distributed switch.
2. On the Configure tab, expand Settings and select Properties.
3. Click Edit.
4. Click Advanced and set the MTU property to a value greater than 1500 bytes.
   You cannot set the MTU size to a value greater than 9000 bytes.
5. Click OK.