OFPST_PORT_DESC reply (xid=0x2):
 1(eth1): addr:fa:16:3e:f4:58:d4
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:52:7f:9c:ee:08:71
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:4e:de:d2:0c:89:4c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:ee:b0:79:d3:04:35
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:f4:58:d4
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
