Reference Guide

Quality of Service 493
• Aggregate Policer — An aggregate policer applies QoS to one or more class
maps, and to one or more flows. An aggregation policer can support class
maps from various policies. An aggregate policer applies QoS to all its
flow(s) in aggregation, regardless of policies and ports. An aggregate policer
is created in the
Aggregate Policer pages.
An aggregate policer is defined if the policer is to be shared with more than
one class.
Each policer is defined with its own QoS specification, and is composed of a
combination of the following parameters:
• Committed Information Rate (CIR) — A maximum allowed rate of
traffic, measured in Kbps.
•
Committed Burst Size (CBS) — An amount of traffic, measured in bytes,
which is allowed to pass as a temporary burst, even if it is above the
defined maximum rate.
•
Exceed Action — An action to be applied to frames that are over the limits
(called out-of-profile traffic). These frames can be forwarded as is,
dropped, or forwarded, after rewriting their DSCP value with a value that
marks them as lower-priority frames for all subsequent handling within the
device.
A policer is assigned to a class map when a class map is added to a policy.
To define an aggregate policer:
1
Click Quality of Service > QoS Advanced Mode > Aggregate Policer to
display the
Aggregate Policer: Summary page.
The existing aggregate policers are displayed.
2 To add an aggregate policer, click Add , and enter the fields.
–
Aggregate Policer Name — Enter the name of the Aggregate Policer.
–
Committed Information Rate (CIR) — Enter the maximum
bandwidth allowed in bits per second. See the description of this field
in Bandwidth.
–
Committed Burst Size (CBS) — Enter the maximum burst size
(even if it goes beyond the CIR) in bytes. See the description of this in
the Bandwidth.