OFPST_PORT_DESC reply (xid=0x2):
 1(eth1): addr:fa:16:3e:4b:fb:38
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:8e:5b:91:b1:97:17
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:76:ef:80:7c:63:65
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:12:80:12:86:f1:92
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:4b:fb:38
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
