ProCurve 2610-PWR Technical Information download pdf (Page 193)

Quality of Service (QoS): Managing Bandwidth More Effectively

Introduction

QoS Feature Default Menu CLI Web

TCP/UDP Priority Disabled — page 6-21 Refer to the Online Help.

IP-Device Priority Disabled — page 6-28 “

Type-of-Service IP Disabled — page 6-34 “

Precedence Mode

VLAN-ID Priority Disabled — page 6-46 “

Source-Port Priority Disabled — page 6-52 “

DSCP Policy Table Various — page 6-58 “

As the term suggests, network policy refers to the network-wide controls you

can implement to:

■ Ensure uniform and efficient traffic handling throughout your network,

while keeping the most important traffic moving at an acceptable speed,

regardless of current bandwidth usage.

■ Exercise control over the priority settings of inbound traffic arriving in

and travelling through your network.

Adding bandwidth is often a good idea, but it is not always feasible and does

not completely eliminate the potential for network congestion. There will

always be points in the network where multiple traffic streams merge or where

network links will change speed and capacity. The impact and number of these

congestion points will increase over time as more applications and devices

are added to the network.

When (not if) network congestion occurs, it is important to move traffic on

the basis of relative importance. However, without Quality of Service (QoS)

prioritization, less important traffic can consume network bandwidth and

slow down or halt the delivery of more important traffic. That is, without QoS,

most traffic received by the switch is forwarded with the same priority it had

upon entering the switch. In many cases, such traffic is “normal” priority and

competes for bandwidth with all other normal-priority traffic, regardless of

its relative importance to your organization’s mission. This section gives an

overview of QoS operation and benefits, and describes how to configure QoS

in the console interface.

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ProCurve 2610-PWR Technical Information Page 193