OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:be:c8:02:b0:a2:80
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan21): addr:0e:b9:a4:8e:bd:29
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:5a:a7:f7:bf:04:9e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:24:33:1c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:24:33:1c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
