OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:be:00:b3:bf:a7:ce
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan20): addr:06:e0:d0:05:c0:4a
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:26:38:9f:81:d8:f2
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:6d:48:d1
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:6d:48:d1
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
