OFPST_PORT_DESC reply (xid=0x2):
 1(eth1): addr:fa:16:3e:ca:d5:ee
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:da:3d:45:d0:1b:59
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:52:cb:30:2c:72:d1
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:d6:17:89:ed:4a:6e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:ca:d5:ee
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
