Hi Lenny Verkhovsky, Thank you for your response. I am using the Mitaka version of openstack. I followed the https://wiki.openstack.org/wiki/SR-IOV-Passthrough-For-Networking and set the "intel_iommu=on". Here is the output for the VF's config root at A1-22932-compute1:~# cat /proc/cmdline BOOT_IMAGE=/vmlinuz-4.2.0-42-generic root=UUID=ff1b5507-414f-4c96-9fbe-cc3c02c682fc ro intel_iommu=on igbe.max_vfs=2 pci=assign-busses quiet splash vt.handoff=7 root at A1-22932-compute1:~# lspci | grep Ether 03:00.0 Ethernet controller: Intel Corporation 82576 Gigabit Network Connection (rev 01) 03:00.1 Ethernet controller: Intel Corporation 82576 Gigabit Network Connection (rev 01) 04:10.0 Ethernet controller: Intel Corporation 82576 Virtual Function (rev 01) 04:10.1 Ethernet controller: Intel Corporation 82576 Virtual Function (rev 01) 04:10.2 Ethernet controller: Intel Corporation 82576 Virtual Function (rev 01) 04:10.3 Ethernet controller: Intel Corporation 82576 Virtual Function (rev 01) 08:00.0 Ethernet controller: Intel Corporation 82574L Gigabit Network Connection 09:00.0 Ethernet controller: Intel Corporation 82574L Gigabit Network Connection root at A1-22932-compute1:~# ls /sys/bus/pci/devices/0000\:04\:10.0/net/ eth1 Please find the config here http://pastebin.com/Tfaez4Je here are the logs on controller http://pastebin.com/e3s1LaMw here is the nova-compute log http://pastebin.com/qRzG6Tif Thanks -Murali -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.openstack.org/pipermail/openstack-dev/attachments/20160929/30cc9538/attachment.html>