OFPST_PORT_DESC reply (xid=0x2):
 1(ovn-a988b0-0): addr:7a:e3:21:55:1e:0c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(ovn-6cb79b-0): addr:9a:a0:6f:80:47:ee
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-int): addr:de:9a:ab:7c:e6:f9
     config:     PORT_DOWN
     state:      LINK_DOWN
     speed: 0 Mbps now, 0 Mbps max
