OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:e6:de:9f:a1:21:dc
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan21): addr:c6:0e:ee:28:81:39
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:e2:89:e9:ea:a8:ce
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:fe:68:89
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:fe:68:89
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
