ZyXEL Communications Corporation VMG1312B10A Manuale Utente

Chapter 10 Quality of Service (QoS)

VMG1312-B10A User’s Guide

Click Add new Queue or the edit icon in the Queue Setup screen to configure a queue. 

Queue Setup: Add 

The following table describes the labels in this 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.

Queue Setup: Add

Active

Select to enable or disable this queue.

Name

Enter the descriptive name of this queue.

Interface

Select the interface to which this queue is applied.

This field is read-only if you are editing the queue.

Priority

Select the priority level (from 1 to 7) of this queue.

The smaller 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 8) of this queue. 

If two queues have the same priority level, the 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 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.

OK

Click OK to save your changes.

Cancel

Click Cancel to exit this screen without saving.