QoS Policer Setup
Use this screen to view QoS policers that allow you to limit the transmission rate of incoming traffic and apply actions, such as drop, pass, or modify, to the DSCP value of matched traffic. Click Network Setting > QoS > Policer Setup. The screen appears as shown.
Network Setting > QoS > Policer Setup
The following table describes the labels in this screen.
Network Setting > QoS > Policer Setup 
LABEL
Description
Add New Policer
Click this to create a new entry.
#
This is the index number of the entry.
Status
This field displays whether the policer is active or not. A yellow bulb signifies that this policer is active. A gray bulb signifies that this policer is not active.
Name
This field displays the descriptive name of this policer.
Regulated Classes
This field displays the name of a QoS classifier
Meter Type
This field displays the type of QoS metering algorithm used in this policer.
Rule
These are the rates and burst sizes against which the policer checks the traffic of the member QoS classes.
Action
This shows how the policer has the Zyxel 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.
Add or 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.
Network Setting > QoS > Policer Setup > Add New Policer/Edit
The following table describes the labels in this screen.
Network Setting > QoS > Policer Setup > Add New Policer/Edit 
LABEL
Description
Active
Click this switch to enable the policer.
Name
Enter a descriptive name for this policer. You can use up to 16 printable characters except [ " ], [ ` ], [ ' ], [ < ], [ > ], [ ^ ], [ $ ], [ | ], [ & ], or [ ; ]. Spaces are allowed.
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).
Committed Rate
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.
Committed Burst Size
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.
Excess Burst Size
Specify the additional amount of bytes that are admitted at the committed rate besides the committed burst size.
This is the maximum size of the second token bucket in the srTCM.
This field is only available when you select Single Rate Three Color in the Meter Type field.
Peak Rate
Specify the maximum rate at which packets are admitted to the network.
The peak rate should be greater than or equal to the committed rate. This is to specify how many bytes of tokens are added to the second bucket every second in the trTCM.
This field is only available when you select Two Rate Three Color in the Meter Type field.
Peak Burst Size
Specify the maximum amount of bytes that are admitted at the committed rate.
This is the maximum size of the second token bucket in the trTCM.
This field is only available when you select Two Rate Three Color in the Meter Type field.
Conforming Action
Specify what the Zyxel Device does for packets within the committed rate and burst size (green-marked packets).
Pass: Send the packets without modification.
DSCP Mark: Change the DSCP mark value of the packets. Enter the DSCP mark value to use.
Partial Conforming Action
Specify the action that the Zyxel Device takes on yellow-marked packets.
Select Pass to forward the packets.
Select Drop to discard the packets.
Select DSCP Mark to assign a specified DSCP number (between 0 and 63) to the packets and forward them. The packets are dropped if there is congestion on the network.
This field is only available when you select Single/Two Rate Three Color in the Meter Type field.
Non-Conforming Action
Specify what the Zyxel Device does for packets that exceed the excess burst size or peak rate and burst size (red-marked packets).
Drop: Discard the packets.
DSCP Mark: Change the DSCP mark value of the packets. Enter the DSCP mark value to use. The packets may be dropped if there is congestion on the network.
Regulated Classes Member Setting
Available Class
Selected Class
Select a QoS classifier to apply this QoS policer to traffic that matches the QoS classifier.
Highlight a QoS classifier in the Available Class box and use the > button to move it to the Selected Class box.
To remove a QoS classifier from the Selected Class box, select it and use the < button.
Cancel
Click Cancel to exit this screen without saving any changes.
OK
Click OK to save your changes.