OFPST_PORT_DESC reply (xid=0x2):
 1(eth1): addr:fa:16:3e:7e:bd:78
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan21): addr:c6:f5:72:53:67:d4
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:ba:80:64:c0:33:97
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:46:24:6f:0d:01:d2
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:7e:bd:78
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
