OFPST_PORT_DESC reply (xid=0x2):
 1(vlan21): addr:06:3e:5a:a9:08:97
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan20): addr:a2:1a:c4:4b:a4:f7
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:52:5b:66:1c:72:5c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:e6:f1:6e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:e6:f1:6e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
