OFPST_PORT_DESC reply (xid=0x2):
 1(ovn-b840b7-0): addr:0a:7d:d9:5b:f6:e1
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 14(tap8d825134-63): addr:fe:16:3e:57:93:be
     config:     0
     state:      0
     current:    10MB-FD COPPER
     speed: 10 Mbps now, 0 Mbps max
 15(tapd9ed9a10-a0): addr:da:48:c7:6f:16:b4
     config:     0
     state:      0
     current:    10GB-FD COPPER
     speed: 10000 Mbps now, 0 Mbps max
 LOCAL(br-int): addr:ba:23:ae:f0:54:03
     config:     PORT_DOWN
     state:      LINK_DOWN
     speed: 0 Mbps now, 0 Mbps max
