CoCdlNodeBehavior

• Base type Enumeration

A network element can take on one of three roles for each CDL enabled interface: endOfHop endOfAggPath cdlRegenerator endOfHop: Indicates that this network element acts as a CDL Hop Terminating Network Element but not as a CDL Aggregate Path Terminating Network Element, at this interface. A CDL Hop Terminating Network Element is a network element that terminates (generates in one direction and consumes in another direction) OAM information associated with a Hop at an interface. A network element will be designated a Hop Terminating Network Element at an interface only if it meets one of the following conditions: (1) It is an Aggregate Path Terminating Network Element, (2) It carries out Hop-by-hop Automatic Protection Switching (APS), or (3) It has been configured to be a Hop Terminating Network Element. This may be desirable at administrative boundaries between networks, for example, in order to limit the span of the hop-by-hop backward defect indication to the interface between the two networks. endOfAggPath: Indicates that this network element acts as a CDL Aggregate Path Terminating Network Element that terminates (generates in one direction and consumes in another direction) OAM information associated with an Aggregate Path (as well as OAM information associated with a Hop), at this interface. A network element will be designated an Aggregate Path Terminating network element at an interface only if it: (1) applies/removes the CDL Ethernet encapsulation, or (2) demultiplexes the arriving aggregate packet stream into elementary packet streams, and multiplexes two or more elementary packet streams into the departing packet stream. cdlRegenerator: A CDL Regenerator transmits a regenerated input packet stream. It monitors integrity of the CDL header and generates CDL alarms (FDI-H) if the incoming packet stream fails. It also terminates the CDL Message Channel.