OFPST_PORT_DESC reply (xid=0x2):
 1(vlan21): addr:0a:42:02:68:72:cb
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan20): addr:0a:42:a9:2a:e3:9b
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:d6:ea:89:c4:74:69
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:ab:f8:12
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:ab:f8:12
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
