ZyXEL Communications Corporation 5VZ-A2011 User Manual

Chapter 16 Quality of Service (QoS)

CellPipe 7130 RG User’s Guide

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

Figure 89   QoS Queue Setup: Add 

The following table describes the labels in this screen.  

Table 70   QoS Queue Setup: Add

Active

Select to enable or disable this queue.

Name

Enter a descriptive name of up to 15 printable English keyboard 
characters, including spaces.

Interface

Select the interface to which this queue is applied.

Priority

Select the priority level (from 1 to 4) 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 CellPipe 7130 RG 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 CellPipe 7130 RG 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). 

Scheduler 
Algorithm

As of writing, this is set to PQWFQ by default. This stands for Priority 
Queue Weighted Fair Queuing, which is a packet-based scheduling 
algorithm that allocates more bandwidth to critical applications.