OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:4a:f7:df:6b:51:74
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan20): addr:32:29:8e:94:4e:a7
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:fe:51:f8:db:b6:13
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:bd:86:39
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:bd:86:39
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
