OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:9e:e9:1c:09:4c:f0
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:c9:43:09
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:e2:2a:9a:ec:57:71
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:ca:67:0e:5e:02:a4
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:c9:43:09
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
