OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:ca:d9:b0:7a:2d:5c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:e9:a2:f8
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:36:0d:2d:dc:30:9b
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:32:e1:b3:37:a7:da
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:e9:a2:f8
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
