OFPST_PORT_DESC reply (xid=0x2):
 1(vlan21): addr:3e:6f:cc:e9:74:27
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan20): addr:56:73:a2:7a:a5:0c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:f2:71:be:a3:fc:f2
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan23): addr:5e:ad:e5:cd:1d:7c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 5(eth1): addr:fa:16:3e:6a:24:b7
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:6a:24:b7
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
