OFPST_PORT_DESC reply (xid=0x2):
 1(eth1): addr:fa:16:3e:8e:17:17
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:d2:d7:07:9a:16:93
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:5e:3e:40:4f:52:21
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:ca:05:5a:e9:ed:2a
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:8e:17:17
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
