OFPST_PORT_DESC reply (xid=0x2):
 1(ovn-1f936b-0): addr:92:4d:9e:17:25:12
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(tap24e0cf3f-16): addr:fe:16:3e:6b:e8:fe
     config:     0
     state:      0
     current:    10MB-FD COPPER
     speed: 10 Mbps now, 0 Mbps max
 3(tap6e3c6c60-20): addr:8a:4d:87:ca:b2:38
     config:     0
     state:      0
     current:    10GB-FD COPPER
     speed: 10000 Mbps now, 0 Mbps max
 4(patch-br-int-to): addr:12:96:74:2a:2b:83
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-int): addr:f6:3b:58:f2:e4:8d
     config:     PORT_DOWN
     state:      LINK_DOWN
     speed: 0 Mbps now, 0 Mbps max
