OFPST_PORT_DESC reply (xid=0x2):
 1(ovn-0bf28f-0): addr:da:a0:59:30:d9:fd
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(ovn-b47474-0): addr:c2:a1:a7:34:0c:90
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-int): addr:96:f1:d8:7b:60:0f
     config:     PORT_DOWN
     state:      LINK_DOWN
     speed: 0 Mbps now, 0 Mbps max
