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Example: Configuring Hierarchical CoS Shaping-Rate Adjustments for Subscriber Local Loops

This example shows how you can enable shaping-rate adjustments for static logical interface sets that represent subscriber local loops:

  1. Configure static logical interface sets to serve as CoS hierarchical scheduler nodes for subscriber local loops.

    This example uses a single scheduler node that represents two subscriber local loops. The scheduler node is a static logical interface composed of two logical interfaces. The underlying physical interface is port 0 on a Gigabit Ethernet EQ MPC in slot 4, PIC 0:

  2. Begin configuring hierarchical CoS on the static logical interface set that serves as the hierarchical scheduler node for the group of subscriber local loops.

  3. Configure the traffic-control profiles that can be applied to the scheduler node:

    In this example, the tcp-premium-with-4-queues traffic-control profile is applied to the interface set. The other profile provides a lower shaping rate and no guaranteed rate.

  4. Configure the scheduler map smap-premium-4q that is referenced in the traffic-control profile for the scheduler node:

  5. Configure the four schedulers (referenced in the scheduler map) that define the four output queues for the scheduler node:

  6. Enable ANCP to communicate with the DSLAM to adjust the CoS shaping rate for the scheduler node.

    You must enable the ANCP feature for performing CoS traffic shaping adjustments, configure the DSLAM as an ANCP neighbor, and specify the DSLAM-assigned identifier for the subscriber local loop represented by the scheduler node Optionally specify byte or percentage adjustments for frame-mode DSL types.


    If ANCP is not yet enabled, the process starts when you commit a configuration that contains the protocols ancp stanza.

  7. You can display the configured shaping rate and the adjusted shaping rate for each logical interface set configured for hierarchical CoS, issue the show class-of-service interface-set operational command.