OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:c6:cb:69:5d:7d:32
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:14:13:04
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:22:5e:c2:0f:ba:9f
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:12:37:85:30:cf:a7
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:14:13:04
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
