OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:f2:fe:66:82:00:a6
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan20): addr:76:08:e7:89:fc:e2
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:5a:e4:09:4a:8e:37
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:b6:a1:57
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:b6:a1:57
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
