OFPST_PORT_DESC reply (xid=0x2):
 1(vlan22): addr:a2:38:2e:04:eb:45
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(eth1): addr:fa:16:3e:ed:de:7e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:82:a9:74:a5:16:d2
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:b6:9c:6b:71:e7:7a
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:ed:de:7e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
