Comment 1 for bug 1604343

Can you please provide the kolla release you are using. I faced a similar issue with stable/mitaka few weeks back. After upgrading the codebase (to release 2.0.2 or 2.0.3), my error of no openvswitch-agent got resolved.

You can check if br-int or br-tun are getting created or not by logging into openvswitch-vswitchd container and run "ovs-vsctl show".