OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:92:0b:56:43:ae:99
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan20): addr:1e:50:7e:43:1e:da
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:3a:a6:1d:a2:60:8a
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:fa:24:45
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:fa:24:45
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
