OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:a2:cb:38:f2:cd:5a
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan21): addr:22:ad:2c:f3:f4:ab
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:de:5b:17:c7:fa:9a
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:89:7d:15
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:89:7d:15
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
