OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:76:21:96:01:66:a1
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:02:52:46:d8:cb:aa
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:9e:13:b3:e5:45:04
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan23): addr:d2:8f:3a:b7:bd:35
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 5(eth1): addr:fa:16:3e:cb:69:1c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:cb:69:1c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
