OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:b6:6e:d1:aa:79:61
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:47:e2:b0
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:92:4c:d5:fc:2b:34
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:fa:4a:39:a9:74:b4
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:47:e2:b0
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
