OFPST_PORT_DESC reply (xid=0x2):
 1(eth1): addr:fa:16:3e:ab:cf:09
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:ee:74:00:56:05:9e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:8e:89:2a:0b:09:b8
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:02:4e:c4:91:ae:12
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:ab:cf:09
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
