OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:86:a0:e7:da:80:a6
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:f9:f1:9e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:a6:e5:8d:69:cb:26
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:32:2e:80:a1:3b:9a
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:f9:f1:9e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
