OFPST_PORT_DESC reply (xid=0x2):
 1(ovn-bdec20-0): addr:52:ca:94:b1:fe:39
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-int): addr:66:0b:0f:05:96:b3
     config:     PORT_DOWN
     state:      LINK_DOWN
     speed: 0 Mbps now, 0 Mbps max
