Qos Policies - Alcatel-Lucent 7450 Quality Of Service Manual

All non-profiled and profiled packets are forwarded through the same ingress access queue
to prevent out-of-sequence forwarding. Profiled packets in-profile are counted against the
total packets flowing through the queue that are marked in-profile. This reduces the amount
of CIR available to non-profiled packets causing fewer to be marked in-profile. Profiled
packets out-of-profile are counted against the total packets flowing through the queue that are
marked in-profile. This ensures that the amount of non-profiled packets marked out-of-profile
is not affected by the profiled out-of-profile packet rate.

QoS Policies

Service ingress, service egress, and network QoS policies are defined with a scope of either
template or exclusive. Template policies can be applied to multiple SAPs or IP interfaces,
whereas, exclusive policies can only be applied to a single entity.
On most systems, the number of configurable SAP ingress and egress QOS policies per
system is larger than the maximum number that can be applied per FP. The tools dump
resource-usage card fp output displays the actual number of policies applied on a given FP
(noting that the default SAP ingress policy is always applied once for internal use). The tools
dump resource-usage system output displays the usage of the policies at a system level. The
show qos sap-ingress and show qos sap-egress commands can be used to show the number
of polices configured.
One service ingress QoS policy and one service egress QoS policy can be applied to a specific
SAP. One network QoS policy can be applied to a specific IP interface. A network QoS policy
defines both ingress and egress behavior.
Router QoS policies are applied on service ingress, service egress, and network interfaces and
define:
Classification rules for how traffic is mapped to queues
The router supports thousands of queues. The exact numbers depend on the hardware being
deployed.
There are several types of QoS policies:
Quality of Service Guide
• The number of forwarding class queues
• The queue parameters used for policing, shaping, and buffer allocation
• QoS marking/interpretation
• Service ingress
• Service egress
• Network (for ingress and egress)
QoS Policies
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