OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:da:5f:2b:3a:b1:ad
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:95:79:c7
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:8e:a9:34:d6:40:7e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:aa:6d:04:a5:aa:d1
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:95:79:c7
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
