OFPST_PORT_DESC reply (xid=0x2):
 1(ovn-21ff71-0): addr:a6:07:61:63:cd:0b
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(ovn-71d4f9-0): addr:9e:6d:59:ca:2a:33
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-int): addr:d2:f3:80:2d:ee:cf
     config:     PORT_DOWN
     state:      LINK_DOWN
     speed: 0 Mbps now, 0 Mbps max
