Here are the 2 options to use VIO:
* VIO , vSphere Ent plus and Distributed Virtual Switch for basic L2 Networking (DVS requires vSphere Ent+)
or
* VIO , vSphere Ent and NSXv for full L2-L7 networking. I believe for NSXv it is sufficient to have vSphere Ent. Please consult with you NSX/VMware account team to get more details.
Hope that helps.
