Alcatel-Lucent 7450 Quality Of Service Manual page 511

Ethernet service switch; service router; extensible routing system

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preferentially allocate bandwidth within a service or subscriber or multi-service site context

through the service or subscriber or multi-service site level policy without affecting the

overall bandwidth allocation to each service or subscriber or multi-service site.

shows a per-service bandwidth 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 22: Schedulers on SAP or Multi-Service Site Receive Bandwidth From Port Priority Levels

Direct Service or Subscriber or Multi-service site Queue Association to Port

Scheduler Parents

The second model of bandwidth allocation on an egress access port is to directly associate a

service or subscriber or multi-service site queue to a port-level scheduler. This model allows

the port scheduler hierarchy to allocate bandwidth on a per class or priority basis to each

service or subscriber or multi-service site queue. This allows the provider to manage the

available egress port bandwidth on a service tier basis ensuring that during egress port

congestion, a deterministic behavior is possible from an aggregate perspective. While this

Quality of Service Guide

Rate Limiting

Rate Limiting

Rate Limiting

QoS Scheduler Policies