Egress Cfhp Queuing - Alcatel-Lucent 7450 Quality Of Service Manual

Post-CFHP Queuing and Scheduling
multicast path to be used. Each table entry maintains a bandwidth counter that is used to
monitor the aggregate traffic per multicast path. This can be optimized by enabling IMPM on
any forwarding complex which allows the system to redistribute this traffic across the IMPM
paths on all forwarding complexes to achieve a more even capacity distribution. Be aware
that enabling IMPM will cause routed and VPLS (IGMP and PIM) snooped IP multicast
groups to be managed by IMPM.
Any discards performed in the ingress shared queues will be reflected in the ingress child
policer's discard counters and reported statistics assuming a discard counter capable stat-
mode is configured for the child policer.

Egress CFHP Queuing

When CFHP is being performed at egress, queuing of the CFHP output packets is
accomplished through egress queue group queues. The system maintains a special egress
queue group template (policer-output-queues) that is automatically applied to all Ethernet
access ports that are up. The number of queues, queue types (expedite or best-effort), queue
parameters and the default forwarding class mappings to the queues are managed by the
template. On each Ethernet port, the queue parameters may be overridden.
When a SAP egress QoS policy is applied to an Ethernet SAP and the policy contains a
forwarding class mapping to a CFHP child policer, the default behavior for queuing the
CFHP output is to use the egress Ethernet port's policer-output-queues queue group and the
forwarding class mapping within the group to choose the egress queue. Optionally, the SAP
egress QoS policy may also explicitly define which egress queue to use within the default
queue group or even map the policer output to a different, explicitly created queue group on
the port.
Any discards performed in the egress queue group queues will be reflected in the egress child
policer's discard counters and reported statistics assuming a discard counter capable stat-
mode is configured for the child policer. Exceed profile traffic from the policer will be
counted as out-of-profile traffic in the egress queue group queues.
Policer to Local Queue Mapping
Egress policers can be optionally mapped to a local queue instead of a queue group queue
where required.
The syntax for assigning one such egress policer mapped to local queue is as below:
*A:Dut-A>config>qos>sap-egress$ pwc
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852 Quality of Service Guide