OFPST_PORT_DESC reply (xid=0x2):
 1(ovn-57e418-0): addr:52:a0:ed:3d:a0:10
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(ovn-170ec8-0): addr:36:a5:c9:68:21:2b
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(ovn-eb059b-0): addr:32:00:00:22:30:57
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-int): addr:be:ae:4d:25:f0:98
     config:     PORT_DOWN
     state:      LINK_DOWN
     speed: 0 Mbps now, 0 Mbps max
