OFPST_PORT_DESC reply (xid=0x2):
 1(eth1): addr:fa:16:3e:65:83:04
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:a2:a7:6a:03:4e:cb
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:82:ad:c8:3b:84:76
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:3e:8e:cd:52:4f:d2
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:65:83:04
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
