As far as i know it should support.
How you testing it out?
can you please follow the below link.
and This is a two-step http://blog.scottlowe.org/2009/05/21/vmware-vsphere-vds-vmkernel-ports-and-jumbo-frames/ process. You'll need to repeat this process for each VMkernel port that you want to create with jumbo frame support.
Here are the steps to create a jumbo frames-enabled VMkernel port:Select the host and and go the Configuration tab.
Select Networking and change the view to Distributed Virtual Switch.
Click the Manage Virtual Adapters link.
In the Manage Virtual Adapters dialog box, click the Add link.
Select New Virtual Adapter, then click Next.
Select VMkernel, then click Next.
Select the appropriate port group, then click Next.
Provide the appropriate IP addressing information and click Next when you are finished.
Click Finish. This returns you to the Manage Virtual Adapters dialog box.
From this point on you'll go the rest of the way from the command line. However, leave the Manage Virtual Adapters dialog box open and the vSphere Client running.
To finish the process from the command line:Type the following command (that's a lowercase L) to show the current virtual switching configuration:
At the bottom of the listing you will see the dvPort IDs listed. Make a note of the dvPort ID for the VMkernel port you just created using the vSphere Client. It will be a larger number, like 266 or 139.
Delete the VMkernel port you just created:
esxcfg-vmknic -d -s -v
Recreate the VMkernel port and attach it to the very same dvPort ID:
esxcfg-vmknic -a -i -n -m 9000 -s -v
Use the esxcfg-vswitch command again to verify that a new VMkernel port has been created and attached to the same dvPort ID as the original VMkernel port.