OFPST_PORT_DESC reply (xid=0x2):
 2(ovn-91f2a2-0): addr:22:bb:b5:66:c8:aa
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-int): addr:32:29:70:2c:b9:ce
     config:     PORT_DOWN
     state:      LINK_DOWN
     speed: 0 Mbps now, 0 Mbps max
