OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:36:dc:36:fb:b6:44
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:14:39:e8
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:76:7a:96:9d:24:d0
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:46:57:a6:3c:9f:18
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:14:39:e8
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
