OFPST_PORT_DESC reply (xid=0x2):
 1(eth1): addr:fa:16:3e:c4:a9:40
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:8a:dd:e6:5c:2a:53
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:16:84:6b:93:d6:68
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:92:28:3c:86:98:74
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:c4:a9:40
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
