OFPST_PORT_DESC reply (xid=0x2):
 1(ovn-ef2171-0): addr:aa:b7:74:a7:49:62
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(ovn-fc69d3-0): addr:3a:5b:15:bb:63:73
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(ovn-1479fb-0): addr:3a:0a:de:e6:74:27
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-int): addr:8a:1f:5b:f0:9e:fd
     config:     PORT_DOWN
     state:      LINK_DOWN
     speed: 0 Mbps now, 0 Mbps max
