OFPST_PORT_DESC reply (xid=0x2):
 1(ovn-18a698-0): addr:8a:86:3d:79:be:ad
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(ovn-1c9e0a-0): addr:02:75:66:e7:e0:3d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 40(tapb2f280bb-e4): addr:fe:16:3e:e6:9b:e7
     config:     0
     state:      0
     current:    10MB-FD COPPER
     speed: 10 Mbps now, 0 Mbps max
 LOCAL(br-int): addr:7a:7e:f5:f5:c5:3f
     config:     PORT_DOWN
     state:      LINK_DOWN
     speed: 0 Mbps now, 0 Mbps max
