Propagating CoS shaping rate adjustments that are based on multicast traffic

You can set up CoS shaping rate adjustments that are based on multicast traffic to be propagated to the parent in the scheduler hierarchy. For service providers that are using interface sets to deliver services such as voice and data and multicast VLANs (M-VLANs) to deliver broadcast television, you can set up CoS so that when a subscriber begins receiving multicast traffic, the shaping rate of the subscriber interface is adjusted to account for the multicast traffic. You can now set up the CoS multicast adjustment to be propagated from the subscriber interface to the interface set, which is the parent in the scheduler hierarchy. This feature prevents oversubscription of the subscriber, which can result in dropped traffic and service disruption.