OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:ea:df:9a:8d:c8:be
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan21): addr:be:76:00:8e:00:17
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:3a:91:a8:82:0e:bc
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:d4:9a:20
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:d4:9a:20
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
