OFPST_PORT_DESC reply (xid=0x2):
 1(vlan21): addr:3e:ae:2b:2f:4d:66
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan20): addr:aa:61:af:cf:8c:6f
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:ce:c6:f2:d8:b8:a4
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:05:77:c9
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:05:77:c9
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
