Cloned from launchpad blueprint https://blueprints.launchpad.net/neutron/+spec/ml2-use-dpdkvhost. Description: Intel(R) DPDK UserSpace vhost is a high-throughput implementation of the standard qemu vhost interface for qemu versions <2.0. At present neutron cannot report to nova if a virtual switch requires the DPDKVHOST backend. To support DPDKVHOST in nova and neutron enhancements to mech_openvswitch and mechanism_odl are required. Specification URL (additional information): https://review.openstack.org/#/c/107797/1/specs/juno/ml2-use-dpdkvhost.rst