OFPST_PORT_DESC reply (xid=0x2):
 2(ovn-a6c540-0): addr:ca:7a:16:91:4d:a8
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-int): addr:5a:16:94:54:97:d3
     config:     PORT_DOWN
     state:      LINK_DOWN
     speed: 0 Mbps now, 0 Mbps max
