OFPST_PORT_DESC reply (xid=0x2):
 1(ovn-3ec410-0): addr:a6:81:b6:38:45:c9
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(ovn-539cfa-0): addr:ca:9b:92:d4:9d:df
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(ovn-e9717b-0): addr:9a:79:cb:41:26:f2
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-int): addr:e6:36:a7:ca:f9:bb
     config:     PORT_DOWN
     state:      LINK_DOWN
     speed: 0 Mbps now, 0 Mbps max
