OFPST_PORT_DESC reply (xid=0x2):
 2(ovn-4b6d97-0): addr:da:ee:9f:3e:1b:40
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-int): addr:7e:98:fc:e5:a5:43
     config:     PORT_DOWN
     state:      LINK_DOWN
     speed: 0 Mbps now, 0 Mbps max
