OFPST_PORT_DESC reply (xid=0x2):
 1(ovn-3c6a4a-0): addr:2a:b5:aa:97:2c:00
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(ovn-9ad46e-0): addr:6a:a7:92:f4:f5:5d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-int): addr:52:cc:0c:7e:f3:4d
     config:     PORT_DOWN
     state:      LINK_DOWN
     speed: 0 Mbps now, 0 Mbps max
