What is VIO (VMware Integrated Openstack)?

VMware Integrated OpenStack is a VMware supported OpenStack distribution (distro) that makes it easier for IT to run a production-grade OpenStack-based deployment on top of their existing VMware infrastructure. Building on their existing expertise, VMware administrators can foster innovation and agility by providing their developers with simple vendor-neutral OpenStack APIs on top of VMware’s best-of-breed SoftwareDefined Data Center (SDDC) infrastructure. Key administration capabilities, including install, upgrade, troubleshooting, and cost-visibility are provided via deep integration with already familiar VMware management tools, enabling fast time to innovation and lower total cost of ownership.

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Benefits:-
• OpenStack Powered Platform Certified (DefCore 2015.04)
• Enterprise Grade OpenStack Cloud
• No OpenStack PhD Required
• Simplified OpenStack Operations
• Single Vendor Support
• Free for all VMware vSphere® Enterprise Plus customers, including vSphere with Operations Management™ Enterprise Plus and vCloud Suite® customers

NSX and VIO Interoperability:-

 
VSAN and VIO Interoperability:-

Refer this for Interoperability Matrix:-
http://partnerweb.vmware.com/comp_guide2/sim/interop_matrix.php

For more info:-
https://www.vmware.com/files/pdf/openstack/VMware-Integrated-OpenStack-Datasheet.pdf