OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:2e:c3:ac:ad:6c:1a
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan20): addr:d2:02:72:06:36:e7
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:62:d9:50:4b:20:8f
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:b3:99:ba
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:b3:99:ba
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
