This MIB module defines objects to manage Converged Data Link
(CDL).

CDL provides OAM&P (Operation, Administration, Maintenance and
Provisioning) in Ethernet packet-based optical networks without
a SONET/SDH layer.

The CDL functionality can be divided into the following
categories:

APS/Defect Indications:
   The CDL frame carries defect indication bits and provides
   signalling mechanism support for automatic protection
   switching.

Message Channel:
   The message channel is used to carry control (e.g. routing,
   signalling) and management traffic.

Packet-by-packet multiplexing of multiple data flows:
   CDL uses one or two octets to identify the elementary 
   packet stream that this packet belongs to. This allows 
   more than one elementary packet stream to share the 
   bandwidth on a CDL enabled interface.

This MIB defines objects to manage Defect Indications and the
Packet-by-packet Multiplexing feature.

The CDL Message channel is modeled as a separate interface and
should be controlled using the IF-MIB and other MIBs for
managing IP. This MIB does not provide a mechanism to manage
the CDL message channel.

APS configuration and monitoring can be done using the
CISCO-APS-MIB and CISCO-APS-EXT-MIB.