If you want to use the SR-IOV feature with OpenContrail or Neutron OVS, your environment must meet the following prerequisites:
Intel Virtualization Technology for Directed I/O (VT-d) and Active State Power Management (ASPM) must be supported and enabled in BIOS
Physical NIC with Virtual Function (VF) driver installed Enable ASPM (Active State Power Management) of PCI Devices in BIOS. If required, upgrade BIOS to see ASPM option.