OFPST_PORT_DESC reply (xid=0x2):
 1(ovn-77f798-0): addr:1a:d1:81:54:69:2f
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(ovn-7f21a3-0): addr:22:0d:2f:25:c5:83
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-int): addr:ba:20:4a:f8:77:8c
     config:     PORT_DOWN
     state:      LINK_DOWN
     speed: 0 Mbps now, 0 Mbps max
