OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:22:72:83:2e:9d:14
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan21): addr:76:56:0a:cb:6f:27
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:a2:10:a9:9c:01:fe
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:48:cc:42
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:48:cc:42
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
