ZyXEL GS1920 Series User Guide - Page 153
Overview, Configuring
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CHAPTER 20 Classifier 20.1 Overview This chapter introduces and shows you how to configure the packet classifier on the Switch. It also discusses Quality of Service (QoS) and classifier concepts as employed by the Switch. 20.1.1 What You Can Do Use the Classifier screen (Section 20.2 on page 153) to define the classifiers and view a summary of the classifier configuration. After you define the classifier, you can specify actions (or policy) to act upon the traffic that matches the rules. 20.1.2 What You Need to Know 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-ondemand. 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 to form a flow. Configure QoS on the Switch 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 on a classified traffic flow (refer to Chapter 21 on page 158 to configure policy rules). 20.2 Configuring the Classifier Use the Classifier screen to define the classifiers. After you define the classifier, you can specify actions (or policy) to act upon the traffic that matches the rules. To configure policy rules, refer to Chapter 21 on page 158. Click Advanced Application > Classifier in the navigation panel to display the configuration screen as shown. GS1920 Series User's Guide 153
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