This object reflects the current status of the CDL flow defect
indications received from the CDL network, at this interface.
Note that the end-to-end path forward defect indication is
implicit, i.e. it is not signalled using a bit. An end-to-end
path forward defect is inferred when no CDL Ethernet or Idle
packets are received with the flow identifier value specified
by coCdlFromCdlNetFlowIdentifier, over a pre-determined length
of time.