@Darragh O'Reilly It is quiet possible because it is the dhcp agent that creates port for dnsmasq. Nova driver creates it for VM. Some time back I learnt from the launchpad that 'agent/linux/interface.py' is the one responsible. Checking the vif driver would be a good place to start as you mentioned. However I just wanted some clarification on the below On the compute node, i have an initial bridge, with two physical interfaces in bonding, with some VLANs trunked on the bond @DeadManMoving Why do you need to add physical interfaces to your integration bridge? http://www.csscorp.com/common/email-disclaimer.php -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.openstack.org/pipermail/openstack/attachments/20140203/7011c1c0/attachment.html>