OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:3a:f0:bf:38:5f:e3
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:9d:9b:d4
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:da:dd:c3:78:5d:dd
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:72:ed:9e:00:f5:ca
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:9d:9b:d4
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
