Dell X1000 Networking X-Series Switches User Guide - Page 238

Aggregate Policer

Page 238 highlights

FILE LOCATION: C:\Users\gina\Desktop\Checkout_new\Dell Astute\User Guide\Dell_Astute_Network_Admin_QoS.fm This is done by using the ACLs in the class map(s) to match the desired pattern of traffic, and by using a policer to apply QoS on the matching traffic. A policer is configured with a QoS specification. There are two kinds of policers: • Single Policer - A single policer applies the QoS to a single class map, and to a single flow, based on the policer's QoS specification. When a class map, using a single policer, is bound to multiple ports, each port has its own instance of the single policer; each applying the QoS on the class map (flow) at ports that are otherwise independent of each other. A single policer is created in the Policy Table and Policy Class Maps pages. • 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 Aggregated 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. Aggregate Policer A policer is assigned to a class map when a class map is added to a policy. To define an aggregate policer: DELL CONFIDENTIAL - PRELIMINARY 8/9/16 - FOR PROOF ONLY 238 Network Administration: Quality of Service

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238
Network Administration: Quality of Service
FILE LOCATION:
C:\Users\gina\Desktop\Checkout_new\Dell Astute\User
Guide\Dell_Astute_Network_Admin_QoS.fm
DELL CONFIDENTIAL – PRELIMINARY 8/9/16 - FOR PROOF ONLY
This is done by using the ACLs in the class map(s) to match the desired
pattern of traffic, and by using a policer to apply QoS on the matching traffic.
A policer is configured with a QoS specification. There are two kinds of
policers:
Single Policer
— A single policer applies the QoS to a single class map,
and to a single flow, based on the policer's QoS specification. When a class
map, using a single policer, is bound to multiple ports, each port has its
own instance of the single policer; each applying the QoS on the class map
(flow) at ports that are otherwise independent of each other. A single
policer is created in the
Policy Table
and
Policy Class Maps
pages.
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
Aggregated 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.
Aggregate Policer
A policer is assigned to a class map when a class map is added to a policy
.
To define an aggregate policer: