OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:ba:e5:3d:02:a3:f6
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:e9:7c:e8
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:3a:9d:5c:ec:af:5b
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:42:a2:47:4d:ea:21
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:e9:7c:e8
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
