Alcatel-Lucent 7450 Quality Of Service Manual page 198

Service Egress QoS Policy
The number of configuration combinations of a policer and one of the above methods is
capped at 63 within a given SAP egress QoS policy. For two or more definitions to be counted
as a single combination, their action statement must have the same policer ID, the same queue
ID (if specified in either statement), the same port-redirect-queue-group (if specified in
either statement) and the parameter use-fc-mapped-queues (if specified in either statement).
The forwarding class and profile used are irrelevant when considering the number of
combinations. For example, it is possible to configure 32 policers with traffic exiting queue
1 but then, only 31 of the same policers are exiting queue 2; this would use all 63
combinations. A resource is also allocated per FP where each combination configured
corresponds to an egress bypass entry used in the FP per sap-instance or per subscriber-sap-
sla instance which use the egress qos policy. The number of egress bypass entries available
on an FP, together with the number allocated and the number free, can be seen using the
following tools command.
*A:PE>tools>dump>resource-usage# card 1 fp 1
===============================================================================
Resource Usage Information for Card Slot #1 FP #1
===============================================================================
-------------------------------------------------------------------------------
...
...
This is supported on all FP2- and higher-based hardware, excluding when a HS-MDA is used.
QPPB processing takes precedence over this feature.
This could be used, for example, when it is required that egress traffic with a DSCP value EF
is to be policed instead of shaped in a queue on a given SAP. The traffic could be classified
based on its DSCP value and directed to policer 1 while the remainder of the customer's
traffic is processed using egress queue 1. This is shown in
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• A SAP queue configured within the SAP egress QoS policy.
• The queue to which the forwarding class for the traffic is mapped. This could be a
queue group, SAP, or subscriber queue. This requires the use of the use-fc-mapped-
queue parameter in the criteria action statement. If the forwarding class is modified
in the action statement then new forwarding class selects the queue to be used.
Egress Qos Bypass
Total Allocated
262143 0
Figure 13.
Quality of Service Guide
Free
262143