OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:82:cb:a0:7c:67:22
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:8c:59:45
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:da:77:7b:49:3c:ff
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:6e:d7:d4:7b:2e:a8
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:8c:59:45
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
