OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:02:81:e6:6f:42:05
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:29:8f:74
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:9a:d1:52:76:0d:a3
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:22:27:29:43:e0:01
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:29:8f:74
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
