Figure 17: Schedulers On Sap Or Multi-Service Site Receive Bandwidth From Port Priority Levels - Alcatel-Lucent 7450 ESS OS Quality Of Service Manual

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Due to the nature of the two scheduler policy, bandwidth is allocated on a per-service or per-

subscriber basis as opposed to a per-class basis. A common use of the two policy model is for a

carrier-of-carriers mode of business. In essence, the goal of a carrier is to provide segments of

bandwidth to providers who purchase that bandwidth as services. While the carrier does not

concern itself with the interior services of the provider, it does however care how congestion

affects the bandwidth allocation to each provider's service. As an added benefit, the two policy

approach provides the carrier with the ability to preferentially allocate bandwidth within a service

or subscriber context through the service or subscriber level policy without affecting the overall

bandwidth allocation to each service or subscriber.

allocation using the two scheduler policy model. While the figure shows services grouped by

scheduling priority, it is expected that many service models will place the services in a common

port priority and use weights to provide a weighted distribution between the service instances.

Higher weights provide for relatively higher amounts of bandwidth.

Figure 17: Schedulers on SAP or Multi-Service Site Receive Bandwidth From Port Priority Levels

7450 ESS OS Quality of Service Guide

QoS Scheduler Policies

shows a per-service bandwidth

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Rate Limiting

Rate Limiting