OFPST_PORT_DESC reply (xid=0x2):
 1(ovn-9878c2-0): addr:ce:24:e1:85:13:1a
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(patch-br-int-to): addr:3e:39:f1:e4:54:a2
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 16(tap313ade57-d0): addr:fe:16:3e:17:8c:8c
     config:     0
     state:      0
     current:    10MB-FD COPPER
     speed: 10 Mbps now, 0 Mbps max
 17(tap6240fb5f-d0): addr:d6:69:d2:a7:41:25
     config:     0
     state:      0
     current:    10GB-FD COPPER
     speed: 10000 Mbps now, 0 Mbps max
 19(tap396a4331-ad): addr:fe:16:3e:6f:88:f8
     config:     0
     state:      0
     current:    10MB-FD COPPER
     speed: 10 Mbps now, 0 Mbps max
 20(tap06c2002a-90): addr:06:8c:73:f0:a8:8a
     config:     0
     state:      0
     current:    10GB-FD COPPER
     speed: 10000 Mbps now, 0 Mbps max
 LOCAL(br-int): addr:da:e4:42:e2:15:ed
     config:     PORT_DOWN
     state:      LINK_DOWN
     speed: 0 Mbps now, 0 Mbps max
