OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:a6:b0:9c:a5:bb:4b
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:75:41:f0
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:26:ec:d5:8b:1f:5d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:82:ea:69:b4:0a:5e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:75:41:f0
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
