OFPST_PORT_DESC reply (xid=0x2):
 1(vlan21): addr:0a:1e:61:17:64:87
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan20): addr:76:60:8a:6d:9b:30
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:c2:89:df:2f:5d:29
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:4b:d7:dc
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:4b:d7:dc
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
