ZyXEL VMG1312-B10A User Guide - Page 159

Chapter 10 Quality of Service (QoS) 10.6.1 Add/Edit a QoS Policer Click Add new Policer in the Policer Setup screen or the Edit icon next to a policer to show the following screen. Figure 75 Policer Setup: Add/Edit The following table describes the labels in this screen. Table 51 Policer Setup: Add/Edit LABEL Active Name Meter Type DESCRIPTION Select the check box to activate this policer. Enter the descriptive name of this policer. This shows the traffic metering algorithm used in this policer. The Simple Token Bucket algorithm uses tokens in a bucket to control when traffic can be transmitted. Each token represents one byte. The algorithm allows bursts of up to b bytes which is also the bucket size. The Single Rate Three Color Marker (srTCM) is based on the token bucket filter and identifies packets by comparing them to the Committed Information Rate (CIR), the Committed Burst Size (CBS) and the Excess Burst Size (EBS). Committed Rate Committed Burst Size The Two Rate Three Color Marker (trTCM) is based on the token bucket filter and identifies packets by comparing them to the Committed Information Rate (CIR) and the Peak Information Rate (PIR). Specify the committed rate. When the incoming traffic rate of the member QoS classes is less than the committed rate, the device applies the conforming action to the traffic. Specify the committed burst size for packet bursts. This must be equal to or less than the peak burst size (two rate three color) or excess burst size (single rate three color) if it is also configured. This is the maximum size of the (first) token bucket in a traffic metering algorithm. VMG1312-B Series User's Guide 159