OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:02:c0:9b:c5:6d:a4
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:11:6a:6d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:e2:fa:ad:9d:20:c7
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:ce:ab:4a:ed:59:1f
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:11:6a:6d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
