OFPST_PORT_DESC reply (xid=0x2):
 1(eth1): addr:fa:16:3e:6e:bc:fd
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:fa:3d:eb:bf:b2:84
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:06:f4:ba:8c:74:25
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:2a:43:6d:69:af:42
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:fa:16:3e:6e:bc:fd
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
