OFPST_PORT_DESC reply (xid=0x2):
 1(vlan21): addr:82:cd:ba:2e:47:6e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan20): addr:a2:db:c8:fc:32:ad
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:62:00:fa:51:0e:67
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan23): addr:ca:33:9e:39:72:e3
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 5(eth1): addr:fa:16:3e:3b:05:3b
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:3b:05:3b
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
