3Com 3C17203 - SuperStack 3 Switch 4400, Implementation Manual

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6
U
SING
T
RAFFIC
P
RIORITIZATION
Using the traffic prioritization capabilities of your Switch provides Quality
of Service (QoS) to your network through increased reliability of data
delivery. You can prioritize traffic on your network to ensure that high
priority data is transmitted with minimum delay.
Traffic can be controlled by a set of rules to obtain the required Quality of
Service for your network. The rules define different types of traffic and
specify how each type should be treated as it passes through the Switch,
for example, prioritized or discarded. Being able to define exactly how
you want your Switch to treat selected applications, devices, users and
types of traffic allows you to have more control over your network.
There are two different categories of rules:
■
Application-based rules — describe how to deal with traffic for a
specific application, for example, Netmeeting or Lotus Notes.
■
Device-based rules — describe how to deal with traffic that flows to
and from specific devices, for example, servers or server farms.
This chapter explains more about traffic prioritization.
■
What is Traffic Prioritization?
■
How Traffic Prioritization Works
■
Configuring Traffic Prioritization on the Switch
■
Important QoS Considerations
■
Default QoS Configurations
■
Example QoS Configurations
■
Other Configuration Examples and Guidelines
By default, the SuperStack 3 Switch 4400 SE supports a basic level of
QoS. To make advanced traffic prioritization available on the Switch 4400