Dear, When OVS plugin is used with GRE option in Neutron, I see that each compute node has br-tun and br-int bridges created. I'm trying to understand why we need the additional br-tun bridge here. Can't we create tunneling ports in br-int bridge, and have br-int relay traffic between VM ports and tunneling ports directly? Why do we have to introduce another br-tun bridge? Regards, Juno Zhu Staff Software Engineer, System Networking China Systems and Technology Lab (CSTL), IBM Wuxi Email: nazhu at cn.ibm.com -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.openstack.org/pipermail/openstack-dev/attachments/20150521/660a43f2/attachment.html>