OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:be:50:b7:f5:1e:a1
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:00:9d:9d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:d2:a8:40:65:bd:bb
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:92:8c:ed:37:91:a3
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:00:9d:9d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
