ZyXEL Communications VMG1312-T10C, User Manual

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Chapter 9 Quality of Service (QoS)
VMG1312-T10C User’s Guide
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9.5.1 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 85
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.
Table 44
Network Setting > QoS > Policer Setup (continued)
LABEL DESCRIPTION
Table 45
Policer Setup: Add/Edit
LABEL DESCRIPTION
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).