OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:ce:2e:5c:50:19:ed
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:a1:30:ec
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:56:e3:29:2d:91:c7
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:d6:69:0b:ca:5e:ca
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:a1:30:ec
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
