ZyXEL Communications P-660HN-51 - 17.5 The Class Setup Screen

Chapter 17 Quality of Service (QoS)
P-660HN-51 User’s Guide
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17.5 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 Advanced > QoS > Class Setup to open the following screen.
Figure 97 Advanced > QoS > Class Setup
The following table describes the labels in this screen.
Weight Select the weight (from 1 to 8) 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.
Buffer
Management
This field displays Drop Tail (DT). Drop Tail (DT) is a simple queue management algorithm
that allows the Zyxel Device buffer to accept as many packets as it can until it is full.
Once the buffer is full, new packets that arrive are dropped until there is space in the
buffer again (packets are transmitted out of it).
Rate Limit Specify the maximum transmission rate (in Kbps) allowed for traffic on this queue.
Apply Click Apply to save your changes.
Cancel Click Cancel to exit this screen without saving.
Table 72 Queue Setup: Add (continued)
LABEL DESCRIPTION
Table 73 Advanced > QoS > Class Setup
LABEL DESCRIPTION
Add new Classifier Click this to create a new classifier.
# This is the index number of the entry.
Status This field displays whether the classifier is active or not. A yellow bulb signifies that
this classifier is active. A gray bulb signifies that this classifier is not active.
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.