OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:46:75:e4:ca:a7:f3
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:e1:af:0b
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:0e:9d:e5:22:bd:96
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:6e:6d:28:f0:99:e7
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:e1:af:0b
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
