Description: Enables/disables CDL on this interface. When this object is set to 'true', CDL is enabled on this interface. When this object is set to 'false', CDL is disabled on this interface.

When CDL is enabled, the following actions are taken: 1) When a non-CDL packet is progressed to this interface for transmission, the Ethernet packet is modified to carry the CDL header. Similarly, when a received packet is progressed from this interface to a non-CDL interface, the CDL header is removed from the Ethernet packet. 2) Processing of CDL defect indications is activated. 3) The CDL Message Channel used to carry control (e.g. routing, signalling) and management traffic is activated. The SNMP agent creates an interface that represents the CDL Message Channel. The interface representing the CDL Message Channel is shown as a higher layer interface, with ifType 'propPointToPointSerial', residing above this CDL enabled interface in the ifStackTable in the IF-MIB. 4) The CDL APS Channel is activated, if supported and APS is configured for this interface. 5) Transport of multiple data flows (i.e. packet-by-packet multiplexing) is activated, if this capability is supported on this interface.

When CDL is disabled, only traditional (non-CDL) Ethernet packets are transported, all packets on this interface are treated as one Ethernet data flow, and the interface representing the CDL message channel is deleted.