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Chapter 10 Quality of Service (QoS)
ADSL Series User’s Guide
169
10.4 The Class Setup Screen
Use this screen to add, edit or delete QoS classifiers. A classifier groups traffic into data flows
according to specific criteria such as the source address, destination address, source port number,
destination port number or incoming interface. For example, you can configure a classifier to select
traffic from the same protocol port (such as Telnet) to form a flow.
You can give different priorities to traffic that the ZyXEL Device forwards out through the WAN
interface. Give high priority to voice and video to make them run more smoothly. Similarly, give low
priority to many large file downloads so that they do not reduce the quality of other applications.
Click Network Setting > QoS > Class Setup to open the following screen.
Figure 81 Network Setting > QoS > Class Setup
The following table describes the labels in this screen.
Priority Select the priority level (from 1 to 7) of this queue.
The larger the number, the higher the priority level. Traffic assigned to higher priority
queues gets through faster while traffic in lower priority queues is dropped if the network is
congested.
Weight Select the weight (from 1 to 15) of this queue.
If two queues have the same priority level, the ZyXEL Device divides the bandwidth across
the queues according to their weights. Queues with larger weights get more bandwidth
than queues with smaller weights.
Rate Limit Specify the maximum transmission rate (in Kbps) allowed for traffic on this queue.
Apply Click Apply to save your changes.
Back Click Back to return to the previous screen without saving.
Table 43 Queue Setup: Add/Edit
LABEL DESCRIPTION
Table 44 Network Setting > QoS > Class Setup
LABEL DESCRIPTION
Add new Classifier Click this to create a new classifier.
Order This field displays the order number of the classifier.
Status Select the check box to enable the classifier.
Class Name This is the name of the classifier.
Classification Criteria This shows criteria specified in this classifier, for example the interface from which
traffic of this class should come and the source MAC address of traffic that matches
this classifier.
Forward to This is the interface through which traffic that matches this classifier is forwarded out.
DSCP Mark This is the DSCP number added to traffic of this classifier.