Extreme Networks Summit1 Quality of Service QoS, Overview of Quality of Service, Building Blocks

8Quality of Service (QoS)

This chapter describes the concept of Quality of Service (QoS) and explains how to implement QoS on the Summit.

OVERVIEW OF QUALITY OF SERVICE

QoS is a feature of the Summit that allows you to specify different service levels for outbound traffic. QoS is an effective control mechanism for networks that have heterogeneous traffic patterns. Using QoS, you can specify the service that a traffic type receives.

The main benefit of QoS is that it allows you to have control over the types of traffic that receive enhanced service from the switch. For example, if video traffic requires a higher priority than data traffic, using QoS you can assign a different QoS profile to those VLANs that are transmitting video traffic.

BUILDING BLOCKS

Quality of Service is determined by one or more of the following building blocks:

•QoS mode — Indicates whether the switch should use egress or ingress traffic classifications. Ingress is the default.

•QoS profile — Includes bandwidth and priority parameters.

•Traffic classification —A method of grouping traffic that has one or more attributes in common.

SUMMIT SWITCH INSTALLATION AND USER GUIDE 8-1