OFPST_PORT_DESC reply (xid=0x2):
 1(ovn-d0377f-0): addr:e2:23:73:41:e4:7d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 8(tapd9faf41e-a8): addr:fe:16:3e:61:28:24
     config:     0
     state:      0
     current:    10MB-FD COPPER
     speed: 10 Mbps now, 0 Mbps max
 9(tap4769a004-50): addr:b2:7a:ea:1c:30:2f
     config:     0
     state:      0
     current:    10GB-FD COPPER
     speed: 10000 Mbps now, 0 Mbps max
 12(patch-br-int-to): addr:f2:32:60:de:6c:e3
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-int): addr:2e:d0:7d:d9:b1:73
     config:     PORT_DOWN
     state:      LINK_DOWN
     speed: 0 Mbps now, 0 Mbps max
