OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:de:72:96:f4:c2:89
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:9d:e9:2c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:e6:71:9b:14:6b:31
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:22:83:e2:63:fc:d7
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:9d:e9:2c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
