ZyXEL Communications P-660H-T Series User Manual

P-660H/HW-T Series User’ Guide

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Chapter 16 Media Bandwidth Management Advanced Setup

bandwidth filter. You can configure up to one bandwidth filter per bandwidth class. You can 
also configure bandwidth classes without bandwidth filters. However, it is recommended that 
you configure child-classes with filters for any classes that you configure without filters. The 
Prestige leaves the bandwidth budget allocated and unused for a class that does not have a 
filter itself or child-classes with filters. View your configured bandwidth classes and child-
classes in the Class Setup screen (see 

 for details).

The total of the configured bandwidth budgets for child-classes cannot exceed the configured 
bandwidth budget speed of the parent class. 

Bandwidth management allows you to define how much bandwidth each class gets; however, 
the actual bandwidth allotted to each class decreases or increases in proportion to actual 
available bandwidth. 

These examples show bandwidth management allotments on a WAN interface that is 
configured for 640Kbps.

The bandwidth classes in the following example are based solely on application. Each 
bandwidth class (VoIP, Web, FTP, E-mail and Video) is allotted 128kbps.

Figure 88   Application-based Bandwidth Management Example

The following example uses bandwidth classes based solely on LAN subnets. Each bandwidth 
class (Subnet A and Subnet B) is allotted 320kbps.