OFPST_PORT_DESC reply (xid=0x2):
 1(eth1): addr:fa:16:3e:c3:12:b9
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:06:11:66:01:64:ff
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:82:53:47:e8:bf:5a
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:ce:ce:78:0b:b1:f7
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:c3:12:b9
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
