ZyXEL Communications OLT2406, User Manual

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Chapter 71 Classifier
OLT2406 User’s Guide
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Classifier
71.1 Classifier and QoS Overview
This chapter introduces and shows you how to configure the packet classifier on the OLT.
Quality of Service (QoS) refers to both a network's ability to deliver data with minimum delay, and the
networking methods used to control the use of bandwidth. Without QoS, all traffic data is equally likely
to be dropped when the network is congested. This can cause a reduction in network performance and
make the network inadequate for time-critical application such as video-on-demand.
A classifier groups traffic into data flows according to specific criteria such as the source address,
destination address, source port number, destination port number or incoming port number. For
example, you can configure a classifier to select traffic from the same protocol port (Such as Telnet) to
form a flow.
Configure QoS on the OLT to group and prioritize application traffic and fine-tune network performance.
Setting up QoS involves two separate steps:
1
Configure classifiers to sort traffic into different flows.
2
Configure policy rules to define actions to be performed for a classified traffic flow (Refer to Chapter 73
on page 517 to configure policy rules).