OFPST_PORT_DESC reply (xid=0x2):
 1(vlan21): addr:a6:49:7e:f9:77:0d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan20): addr:92:ca:7e:c4:45:d1
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:a6:40:cd:fc:a6:c4
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(eth1): addr:fa:16:3e:4a:ce:58
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:4a:ce:58
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
