OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:ca:1c:93:0d:37:4c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:37:a6:9c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:ca:5c:96:9e:6b:79
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:de:62:72:01:9e:09
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:37:a6:9c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
