OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:f2:df:10:e5:7f:ce
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:ea:ab:77
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:ea:14:48:e5:29:18
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:12:00:26:53:75:43
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:ea:ab:77
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
