OFPST_PORT_DESC reply (xid=0x2):
 1(eth1): addr:fa:16:3e:17:2a:55
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:e6:5c:9f:6d:16:48
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:ca:70:04:bd:e3:fd
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:72:7d:fc:e0:08:9e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:17:2a:55
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
