OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:ae:6b:f6:5c:9c:0c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:5b:07:5f
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:fa:20:3e:9b:41:41
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:ca:5f:65:63:a1:d6
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:5b:07:5f
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
