Switches - Juniper JUNOS OS 10.3 - SOFTWARE Manual

Complete Software Guide for Junos
Understanding Junos OS EZQoS for CoS Configurations on EX Series Switches
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3166
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OS for EX Series Ethernet Switches, Release 10.3
Junos operating system (Junos OS) EZQoS on Juniper Networks EX Series Ethernet
Switches eliminates the complexities involved in configuring class of service (CoS) across
the network. EZQoS offers templates for key traffic classes.
Junos OS CoS allows you to divide traffic into classes and offer various levels of throughput
and packet loss when congestion occurs. You can use CoS to ensure that different types
of traffic (voice, video, and data) get the bandwidth and consideration they need to meet
user expectations and business objectives.
Configuring CoS requires careful consideration of your service needs and thorough planning
and design to ensure consistency across all switches in a CoS domain. To configure CoS
manually, you must define and fine-tune all CoS components such as classifiers, rewrite
rules, forwarding classes, schedulers, and scheduler-maps and then apply these
components to the interfaces. Therefore, configuring CoS can be a fairly complex and
time-consuming task.
EZQoS works by automatically assigning preconfigured values to all CoS parameters
based on the typical application requirements. These preconfigured values are stored in
a template with a unique name. You can change the preconfigured values of these
parameters to suit your particular application needs.
For using EZQoS, you must identify which switch ports are being used for a specific
application (such as VoIP, video, and data) and manually apply the corresponding
application-specific EZQoS template to these switch ports.
NOTE: Currently, we provide an EZQoS template for configuring CoS for VoIP.
NOTE: We recommend that you do not use the term
classifier.
Junos OS CoS for EX Series Switches Overview on page 3146
Configuring Junos OS EZQoS for CoS (CLI Procedure) on page 3221
for defining a
EZQoS
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