OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:a6:e7:a5:f3:aa:bc
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:91:17:64
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:82:2b:99:0e:0b:53
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:06:bc:12:70:39:59
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:91:17:64
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
