ZyXEL Communications 4728F User Manual

Chapter 21 Policy Rule

XGS-4526/4528F/4728F User’s Guide

Classifier(s)

This field displays the active classifier(s) you configure in the Classifier 
screen. 

Select the classifier(s) to which this policy rule applies. To select more 
than one classifier, press [SHIFT] and select the choices at the same time. 

Parameters

Set the fields below for this policy. You only have to set the field(s) that is related to the 
action(s) you configure in the Action field. 
General 

Egress 

Port

Type the number of an outgoing port. 

Priority

Specify a priority level. 

DSCP

Specify a DSCP (DiffServ Code Point) number between 0 and 63.

TOS

Specify the type of service (TOS) priority level.

Metering

You can configure the desired bandwidth available to a traffic flow. Traffic 
that exceeds the maximum bandwidth allocated (in cases where the 
network is congested) is called out-of-profile traffic. 

Bandwidth Specify the bandwidth in kilobit per second (Kbps). Enter a number 

between 1 and 1000000.

Out-of-

Profile 

DSCP

Specify a new DSCP number (between 0 and 63) if you want to replace or 
remark the DSCP number for out-of-profile traffic. 

Action

Specify the action(s) the Switch takes on the associated classified traffic flow.   
Forwarding

Select No change to forward the packets.

Select Discard the packet to drop the packets.

Select Do not drop the matching frame previously marked for 
dropping to retain the frames that were marked to be dropped before.

Priority

Select No change to keep the priority setting of the frames. 

Select Set the packet’s 802.1p priority to replace the packet’s 802.1p 
priority field with the value you set in the Priority field. 

Select Send the packet to priority queue to put the packets in the 
designated queue. 

Select Replace the 802.1p priority field with the IP TOS value to 
replace the packet’s 802.1p priority field with the value you set in the TOS 
field.

Diffserv

Select No change to keep the TOS and/or DSCP fields in the packets. 

Select Set the packet’s TOS field to set the TOS field with the value you 
configure in the TOS field. 

Select Replace the IP TOS with the 802.1p priority value to replace 
the TOS field with the value you configure in the Priority field.

Select Set the Diffserv Codepoint field in the frame to set the DSCP 
field with the value you configure in the DSCP field.

Table 53   Advanced Application > Policy Rule (continued)