OFPST_PORT_DESC reply (xid=0x2):
 1(eth1): addr:fa:16:3e:5c:ef:cb
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:06:73:fc:d4:10:f6
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:0a:6e:cf:69:39:21
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:b2:3a:a0:10:94:e6
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:5c:ef:cb
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
