Comment 6 for bug 1576185

According to logs above nova waits for 3 events from neutron, one for private and 2 for sr-iov ports: http://xsnippet.org/361662/
events received for 1 private and 1 sr-iov port only: http://xsnippet.org/361663/ which finally causes fail. Same picture is visible from nova-api side. So there is nothing to fix in nova internal communication.