Applying Aggregate Rate Limit To A Vport - Alcatel-Lucent 7450 Quality Of Service Manual

Overview
Each subscriber host queue is port parented to the Vport which corresponds to the destination
DSLAM using the existing port-parent command:
CLI Syntax:
This command can parent the queue to either a port or to a Vport. These operations are
mutually exclusive in CLI as explained above. When parenting to a Vport, the parent Vport
for a subscriber host queue is not explicitly indicated in the above command. It is determined
indirectly. The determination of the parent Vport for a given subscriber host queue is
described in the 7750 SR OS Triple Play Guide.
Subscriber host queues, SLA profile schedulers, subscriber profile scheduler and PW SAPs
(in IES or VPRN services) can be parented to a VPORT.

Applying Aggregate Rate Limit to a VPORT

The user can apply an aggregate rate limit to the Vport and apply a port scheduler policy to
the port.
This model allows the user to over subscribe the Ethernet port. The application of the agg-
rate option is mutually exclusive with the application of a port scheduler policy, or a
scheduler policy to a VPORT.
When using this model, a subscriber host queue with the port-parent option enabled is
scheduled within the context of the port's port scheduler policy. More details are provided in
the 7750 SR OS Triple Play Guide.
Applying a Scheduler Policy to a VPORT
The user can apply a scheduler policy to the VPORT. This is allows scheduling control of
subscriber tier 1 schedulers in a scheduler policy applied to the egress of a subscriber or SLA
profile, or to a PW SAP in an IES or VPRN service. This feature applies only to the 7450 ESS
and 7750 SR.
The advantage of using a scheduler policy under a VPORT, compared to the use of a port
scheduler (with or without an agg-rate rate), is that it allows a port parent to be configured at
the VPORT level as well as allowing the user to oversubscribe the Ethernet port.
534
configure>qos>sap-egress>queue>port-parent [weight
weight] [level level] [cir-weight cir-weight] [cir-
level cir-level]
Quality of Service Guide