I also tested it with flat provider network, and it seems that we have the same issue. The solution provided by Matt works for me also. It seems that the OVS bridge can't use an interface which is already connected to a linuxbridge.
I also tested it with flat provider network, and it seems that we have the same issue. The solution provided by Matt works for me also. It seems that the OVS bridge can't use an interface which is already connected to a linuxbridge.