Dell X1000 Series User Manual

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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:

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Dell X1000 Series Specifications

General

PoE	No
Management	Unmanaged
Switching Capacity	16 Gbps (8-Port), 32 Gbps (16-Port)
Forwarding Rate	11.9 Mpps (8-Port), 23.8 Mpps (16-Port)
Jumbo Frame Support	9KB
Type	Unmanaged
Ports	8
Mounting	Desktop
MAC Address Table Size	8K
Power Consumption	8.5W (16-Port)
Series	X1000 Series