OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:c6:c1:ae:7a:8f:76
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan20): addr:12:c7:91:d8:0b:c7
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:6a:ef:33:c1:bf:8a
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:59:12:6b
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:59:12:6b
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
