Redirection Models - Alcatel-Lucent 7950 Quality Of Service Manual

Extensible routing system

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Redirection Models

Two models are supported for forwarding class redirection. In the first, the actual instance of a

queue group to use for forwarding class redirection is named in the QoS policy. This is termed

policy-based redirection.

In the second model, the forwarding class queue or policers to apply redirection to are identified in

the ingress or egress QoS policy. However, the specific named queue group instance is not

identified until a QoS policy is applied to a SAP. This is termed SAP-based redirection.

Policy-based redirection allows different forwarding classes in the same QoS policy to be

redirected to different queue groups, but it requires at least one QoS policy to be configured per

queue group instance.

SAP-based redirection can require less QoS policies to be configured since the policy does not

have to name the queue group. However, if redirected, all forwarding classes of a given SAP must

use the same named queue group instance.

Policy based redirection is applicable to port queue groups on access ingress and access and

network egress, while SAP based redirection is applicable to forwarding plane queue groups on

access and network ingress, and port queue groups on access and network egress.

7950 XRS Quality of Service Guide