Quality of service, Qos features and components – Dell PowerEdge VRTX User Manual

Page 423

Template Last Updated - 2010

423

D E L L CO N F I D E N T I A L – P R E L I MI N A RY 4/ 1 8 /1 3 - F O R PR O O F O N LY

Quality of Service

This section provides information for configuring Quality of Service (QoS).
It contains the following topics:

QoS Features and Components

The QoS feature is used to optimize network performance. It provides

classification of incoming traffic into traffic classes, based on one or more

attributes, including:

–

Device configuration

–

Ingress interface

–

Packet contents

QoS includes the following features:

• Traffic Classification — Classifies each incoming packet, as belonging to

a specific traffic flow, based on the packet contents and/or interface. The

classification is done by an ACL (Access Control List), and only traffic

that meets the ACL criteria is subject to classification.

• Assignment to Hardware Queues — Assigns incoming packets to

forwarding queues. Packets are sent to a particular queue for handling as a

function of the traffic class to which they belong.

•

Other Traffic Class-Handling Attribute — Applies QoS mechanisms to

various classes, including bandwidth management.