OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:ae:a7:11:3c:92:bf
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:15:7c:48
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:b2:db:08:59:e1:02
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:e6:90:e9:88:0b:c5
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:15:7c:48
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
