OFPST_PORT_DESC reply (xid=0x2):
 1(ovn-475838-0): addr:fe:a1:d4:90:ca:32
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(ovn-9f02b0-0): addr:9e:4d:0a:57:c0:9a
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-int): addr:1a:8b:47:9c:a9:6c
     config:     PORT_DOWN
     state:      LINK_DOWN
     speed: 0 Mbps now, 0 Mbps max
