OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:ae:f6:72:91:f8:51
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:73:ea:58
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:2e:67:9d:ba:d3:54
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:b6:66:00:85:dd:67
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:73:ea:58
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
