OFPST_PORT_DESC reply (xid=0x2):
 1(ovn-449d47-0): addr:2a:86:5f:ee:87:e5
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(ovn-964b33-0): addr:2a:4b:d1:3f:13:6e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 21(tap0251ef32-ee): addr:fe:16:3e:72:3c:9d
     config:     0
     state:      0
     current:    10MB-FD COPPER
     speed: 10 Mbps now, 0 Mbps max
 22(tapcc412279-19): addr:fe:16:3e:d1:43:c6
     config:     0
     state:      0
     current:    10MB-FD COPPER
     speed: 10 Mbps now, 0 Mbps max
 LOCAL(br-int): addr:3a:0c:15:ba:f0:1f
     config:     PORT_DOWN
     state:      LINK_DOWN
     speed: 0 Mbps now, 0 Mbps max
