OFPST_PORT_DESC reply (xid=0x2):
 1(eth1): addr:fa:16:3e:88:95:ee
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:be:15:db:6d:a4:74
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:52:4f:55:4e:5e:36
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:da:2a:b6:38:08:35
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:88:95:ee
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
