OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:3e:a0:52:c7:65:5f
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:d7:42:bf
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:fa:91:55:e2:c1:73
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:4e:74:0b:61:d1:58
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:d7:42:bf
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
