Adding Vkernal port for vmotion.

Hello,

I do want to add VMkernel so can enable Vmotion, but want to confirm first, before change on production server.

This is my Vswitch for ISCSI network:

Image may be NSFW.
Clik here to view.

So do I need to separate them first into 2 vswitch with 1 nic for 1 subnet and add vmkernal on each switch.

or can I simply add one, give 1 IP address and it would work?

Thanks in Advance.