OFPST_PORT_DESC reply (xid=0x2):
 1(ovn-4c198b-0): addr:a6:ed:c4:de:bd:ef
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-int): addr:1a:d0:5d:b8:b4:97
     config:     PORT_DOWN
     state:      LINK_DOWN
     speed: 0 Mbps now, 0 Mbps max
