OFPST_PORT_DESC reply (xid=0x2):
 1(eth1): addr:fa:16:3e:bd:e2:e6
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:8a:f0:bc:f0:64:14
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:d2:68:56:5f:cb:c5
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:c2:44:95:9c:75:44
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:bd:e2:e6
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
