OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:7a:2b:ca:6f:3a:e5
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan20): addr:a6:cb:4d:f1:a7:2b
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:2a:64:02:28:f2:30
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:b6:91:bb
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:b6:91:bb
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
