OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:e6:29:05:97:9d:48
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan21): addr:96:17:af:b8:93:d8
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:c2:9f:cd:ae:d6:f0
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:fc:1c:5a
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:fc:1c:5a
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
