OFPST_PORT_DESC reply (xid=0x2):
 1(ovn-b65d15-0): addr:8a:04:12:0e:8a:3a
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(patch-br-int-to): addr:4a:f6:1a:fd:e2:33
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-int): addr:7a:9b:75:c2:36:bd
     config:     PORT_DOWN
     state:      LINK_DOWN
     speed: 0 Mbps now, 0 Mbps max
