OFPST_PORT_DESC reply (xid=0x2):
 1(eth1): addr:fa:16:3e:c8:ae:a0
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:4a:38:f3:f6:f7:c8
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:4e:de:9b:a6:cf:77
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:b6:75:f1:06:c1:63
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:c8:ae:a0
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
