OFPST_PORT_DESC reply (xid=0x2):
 1(ovn-b1977f-0): addr:a6:9c:06:e7:2e:bb
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-int): addr:3a:19:c3:01:2b:01
     config:     PORT_DOWN
     state:      LINK_DOWN
     speed: 0 Mbps now, 0 Mbps max
