OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:36:7d:ba:c6:d5:91
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan21): addr:12:34:35:2a:98:02
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:f2:97:c9:9c:36:ed
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:9e:1b:a0
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:9e:1b:a0
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
