OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:4e:ef:38:d8:2f:a9
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan21): addr:4e:5e:f4:4e:71:20
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:0e:50:18:45:d3:f7
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:40:22:10
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:40:22:10
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
