OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:d6:0e:ed:6e:7d:76
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan21): addr:72:85:a1:ab:ca:02
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:5a:40:2f:35:f5:25
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:1a:91:ad
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:1a:91:ad
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
