OFPST_PORT_DESC reply (xid=0x2):
 1(eth1): addr:fa:16:3e:ae:ef:b8
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:56:48:34:94:b4:54
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:56:b9:31:ad:1d:69
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:9a:42:bc:cd:12:1e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:ae:ef:b8
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
