OFPST_PORT_DESC reply (xid=0x2):
 1(ovn-17c313-0): addr:52:56:b1:7a:cd:b3
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(ovn-3b3b3f-0): addr:4e:4e:38:8d:f6:4a
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-int): addr:96:18:0a:c7:98:89
     config:     PORT_DOWN
     state:      LINK_DOWN
     speed: 0 Mbps now, 0 Mbps max
