ZyXEL p-660hwp Guia Do Utilizador

 Chapter 15 Bandwidth Management

P-660HWP-Dx User’s Guide

The following table shows the amount of bandwidth that each class gets.

Suppose that all of the classes except for the administration class need more bandwidth.

• Each class gets up to its budgeted bandwidth. The administration class only uses 1024 

kbps of its budgeted 2048 kbps. 

• The P-660HWP-Dx divides the total 3072 kbps total of unbudgeted and unused bandwidth 

equally among the other classes. 1024 kbps extra goes to each so the other classes each get 
a total of 3072 kbps. 

The following table describes the priorities that you can apply to traffic that the P-660HWP-
Dx forwards out through an interface.

You can set the bandwidth management speed for an interface higher than the interface’s 
actual transmission speed. Higher priority traffic gets to use up to its allocated bandwidth, 
even if it takes up all of the interface’s available bandwidth. This could stop lower priority 
traffic from being sent. The following 

is an example.

Table 88   Fairness-based Allotment of Unused and Unbudgeted Bandwidth Example

Root Class: 10240 kbps

Administration: 1024 kbps

Sales: 3072 kbps

Marketing: 3072 kbps

Research: 3072 kbps

Table 89   Bandwidth Management Priorities

High

Typically used for voice traffic or video that is especially sensitive to jitter (jitter 

is the variations in delay).

Mid 

Typically used for “excellent effort” or better than best effort and would include 

important business traffic that can tolerate some delay.

Low

This is typically used for non-critical “background” traffic such as bulk 

transfers that are allowed but that should not affect other applications and 

users. 

Table 90   Over Allotment of Bandwidth Example

Actual outgoing bandwidth available on the interface: 1000 kbps

Root Class: 1500 kbps  (same 

as Speed setting)

VoIP traffic (Service = SIP): 500 Kbps

High

NetMeeting traffic (Service = H.323): 500 kbps

High

FTP (Service = FTP): 500 Kbps

Medium