OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:b6:53:9f:05:91:3d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:92:ab:db:f4:57:90
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:46:03:fb:bb:ff:dc
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:13:83:4b
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:13:83:4b
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
