OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:4a:7f:d9:b3:e9:5c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:4a:a0:1a
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:e2:bf:13:71:f8:a8
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:46:89:cd:13:73:5f
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:4a:a0:1a
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
