Comment 9 for bug 1788403

http://logs.openstack.org/69/557169/20/gate/tempest-slow/b483789/controller/logs/screen-q-agt.txt.gz

Sep 18 05:00:43.534624 ubuntu-xenial-ovh-gra1-0002079055 neutron-openvswitch-agent[23053]: INFO neutron.agent.common.ovs_lib [None req-4e14c6de-ef93-44ea-ab82-312d93726646 None None] Port dcabb610-ecaa-43c4-8c3d-e7f056024c3a not present in bridge br-int

Usually nova's responsibility to put the port into br-int. Either neutron did not noticed the plug event (ovsdb-client monitor) or nova did put it there with the proper attributes.