OFPST_PORT_DESC reply (xid=0x2):
 1(eth1): addr:fa:16:3e:d8:4f:3e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:5e:0e:75:52:3f:0a
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:f2:17:fb:2b:3a:1f
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:ee:e2:5b:dc:8c:34
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:d8:4f:3e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
