OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:ba:3e:2d:44:0e:ac
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:b5:a7:b8
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:c6:29:ba:a0:0e:87
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:ba:84:ec:5b:43:01
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:b5:a7:b8
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
