Access Queue Group Statistics; Port Queue Groups; Forwarding Plane Queue Groups - Alcatel-Lucent 7450 Quality Of Service Manual

Queue Sharing and Redirection

Access Queue Group Statistics

Port Queue Groups

When a forwarding class is redirected to a ingress or egress port queue group queue, the
packets sent to the queue are statistically tracked by a set of counters associated with the
queue group queue and not with any of the counters associated with the SAP.
This means that it is not possible to perform accounting within a queue group based on the
source SAPs feeding packets to the queue. The statistics associated with the SAP will not
reflect packets redirected to a port queue group queue.
The set of statistics per queue are eligible for collection in a similar manner as SAP queues.
The collect-stats command enables or disables statistics collection in to a billing file based on
the accounting policy applied to the queue group.

Forwarding Plane Queue Groups

When a forwarding class is redirected to a forwarding plane queue group queue or policer,
the packets sent to the queue or policer are statistically tracked by a set of counters associated
with the queue group queue/policer and not with any of the counters associated with the SAP.
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• If an egress QoS policy containing one or more redirections is applied to a SAP, but
either no queue group instance is specified at association time, or a named queue
group instance is specified and either the queue group name or the instance identifier
does not correspond to a queue group that has been created on the egress port, then
the association will be rejected.
• If all of the redirections in an egress QoS policy are to queue ids that do not exist in
the named queue group instance, then the association will be rejected.
• If a policer local to a SAP feeds into a SAP based queue group queue instance, and
the queue ID to use is not explicitly specified in the egress QoS policy (through the
command policer policer-id port-redirect-group-queue) and is instead inferred from
the forwarding class of the policer, but that forwarding class does not exist in the
queue group template, then no error is generated. Instead, the queue with the lowest
queue ID is used in the queue group instance. If at a later time, a user attempts to add
a queue with a given queue-id to a policer redirect for a given forwarding class in the
egress QoS template, then the system will check that the corresponding queue-id
exists in any queue group instances associated with any SAPs using the QoS policy.
Quality of Service Guide