OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:ee:37:df:00:1c:55
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:40:df:05
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:4e:9e:da:a0:8b:49
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:d2:95:0e:cd:3c:9e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:40:df:05
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
