OFPST_PORT_DESC reply (xid=0x2):
 1(ovn-efcb63-0): addr:3a:22:3b:fe:84:cf
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(ovn-1b0741-0): addr:a6:d3:b0:9a:44:2b
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(ovn-031ca0-0): addr:ae:d5:26:04:26:06
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-int): addr:d6:5f:bb:5f:74:7b
     config:     PORT_DOWN
     state:      LINK_DOWN
     speed: 0 Mbps now, 0 Mbps max
