OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:de:b9:b5:cd:99:50
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan21): addr:e6:55:8b:0f:c1:8d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:8e:80:aa:58:79:81
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:95:0a:e5
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:95:0a:e5
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
