OFPST_PORT_DESC reply (xid=0x2):
 1(eth1): addr:fa:16:3e:8c:f3:5f
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:d6:2c:57:f4:41:fd
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:a2:63:bc:11:7d:1f
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:22:ba:5a:cb:cc:46
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:8c:f3:5f
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
