Redirection Models - Alcatel-Lucent 7450 Quality Of Service Manual

Once an ingress queue group template is defined, a forwarding plane queue group with the
same name may be created on an ingress forwarding plane of an IOM, IMM, or XMA.
Forwarding plane queue groups are named objects that act as a container for a group of
policers. Queues are not supported in forwarding plane queue groups. Only hierarchical
policers are supported in the forwarding plane queue group, rather than queues. These
policers may be configured to use profile-aware behavior. The policers are created based on
the defined policer IDs within the associated queue group template. Multiple forwarding
plane queue groups of the same template name may be created on ingress if they have a
different instance identifier. These are termed queue group instances. Each instance of a
named queue group created on a forwarding plane is an independent set of policers structured
as per the queue group template. Forwarding plane queue groups are only supported with
Ethernet ports and may be created on IOMs, IMMs, or XMAs with ports in a LAG.

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.
Quality of Service Guide
Queue Sharing and Redirection
397