OFPST_PORT_DESC reply (xid=0x2):
 1(ovn-20150d-0): addr:b6:cd:2e:97:ba:75
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-int): addr:0a:8d:23:b7:0a:47
     config:     PORT_DOWN
     state:      LINK_DOWN
     speed: 0 Mbps now, 0 Mbps max
