OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:52:df:83:69:c9:6e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:03:e5:89
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:e2:f5:2a:7e:23:9f
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:b6:b8:09:19:90:04
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:03:e5:89
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
