OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:e6:c6:40:6b:a6:04
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan21): addr:2e:1b:c0:56:29:cd
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:ba:86:c8:6d:6e:83
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:57:27:20
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:57:27:20
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
