OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:ea:1b:96:79:90:fe
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:33:1c:ad
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:da:ea:ce:f3:5f:94
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:e6:a1:8e:c6:0c:77
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:33:1c:ad
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
