Hi Arindam, Looks like the driver you are using is depreciated. So I would suggest to try to use the new one as stated in the statement below. Ciao Remo On Jan 8, 2014, at 6:47 PM, Bhattacharjee, Arindam (Arindam) <arindam.bhattacharjee at alcatel-lucent.com> wrote: > # Nova/nova-compute log > WARNING nova.virt.libvirt.vif [req-3b9dae5d-3582-4aa2-8637-4b0b465d106e b81925c907554451a9be9ef91f69ac0d eb8bd4aa2a5043ca9f61fd868da0cec3] Deprecated: The NeutronLinuxBridgeVIFDriver VIF driver is now deprecated and will be removed in the next release. Please use the LibvirtGenericVIFDriver VIF driver, together with a network plugin that reports the 'vif_type' attribute -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.openstack.org/pipermail/openstack/attachments/20140108/a0f1e258/attachment.html>