OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:76:89:00:39:ab:dc
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan20): addr:66:24:42:82:9a:b5
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:a2:59:99:b2:d1:57
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:a2:ec:3a
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:a2:ec:3a
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
