OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:ee:d7:65:89:04:23
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan21): addr:16:d5:82:12:98:5e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:ba:69:a2:bb:3a:2e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:3d:17:90
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:3d:17:90
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
