ZyXEL Communications Corporation VMG1312T10C Manuel D’Utilisation

Chapter 9 Quality of Service (QoS)

VMG1312-T10C User’s Guide

Click Add new Policer in the Policer Setup screen or the Edit icon next to a policer to show the 
following screen. 

Policer Setup: Add/Edit 

The following table describes the labels in this screen. 

Rule

These are the rates and burst sizes against which the policer checks the traffic of the 
member QoS classes.

Action

This shows the how the policer has the Device treat different types of traffic belonging to 
the policer’s member QoS classes.

Modify

Click the Edit icon to edit the policer.

Click the Delete icon to delete an existing policer. Note that subsequent rules move up by 
one when you take this action.

Network Setting > QoS > Policer Setup (continued)

Policer Setup: Add/Edit

Active

Select the check box to activate this policer.

Name

Enter the descriptive name of this policer.

Meter Type

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).

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).