Chapter 14 Quality of Service (QoS)

Table 62 QoS Queue Setup: Add

LABEL

DESCRIPTION

Weight

Select the weight (from 1 to 8) of this queue.

 

If two queues have the same priority level, the P-870HN-51D divides the

 

bandwidth across the queues according to their weights. Queues with

 

larger weights get more bandwidth than queues with smaller weights.

 

 

Buffer

This field displays Drop Tail (DT). Drop Tail (DT) is a simple queue

Management

management algorithm that allows the P-870HN-51D 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.

 

 

Back

Click Back to return to the previous screen without saving.

 

 

Apply

Click Apply to save your changes back to the P-870HN-51D.

 

 

Cancel

Click Cancel to begin configuring this screen afresh.

 

 

14.5 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 P-870HN-51D 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 QoS > Class Setup to open the following screen.

Figure 90 QoS Class Setup

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P-870HN-51D User’s Guide