OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:02:69:e9:e8:7f:f5
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan20): addr:e6:c8:6c:f8:a7:44
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:e2:ed:c3:03:a8:39
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:40:cb:dc
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:40:cb:dc
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
