OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:be:48:5d:16:00:58
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan21): addr:c6:6d:96:e1:69:7e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:16:a9:ef:30:05:38
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:08:29:a4
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:08:29:a4
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
