OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:4e:27:7b:79:12:21
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan21): addr:fa:24:d6:bc:ac:64
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:de:3e:3b:45:29:77
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:2e:6c:24
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:2e:6c:24
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
