ZyXEL Prestige 660HW-D1 Wireless Router 91-004-593003B Manual Do Utilizador

P-660H/HW-D Series User’s Guide

189

Chapter 13 Bandwidth Management

Here is an example of a ZyXEL Device that has maximize bandwidth usage enabled on an 
interface. The following table shows each bandwidth class’s bandwidth budget. The classes 
are set up based on subnets. The interface is set to 10240 kbps. Each subnet is allocated 2048 
kbps. The unbudgeted 2048 kbps allows traffic not defined in any of the bandwidth filters to 
go out when you do not select the maximize bandwidth option.

The ZyXEL Device divides up the unbudgeted 2048 kbps among the classes that require more 
bandwidth. If the administration department only uses 1024 kbps of the budgeted 2048 kbps, 
the ZyXEL Device also divides the remaining 1024 kbps among the classes that require more 
bandwidth. Therefore, the ZyXEL Device divides a total of 3072 kbps of unbudgeted and 
unused bandwidth among the classes that require more bandwidth. 

The following table shows the priorities of the bandwidth classes and 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 sales and marketing are first to get extra bandwidth because they have the highest 

priority (6). If they each require 1536 kbps or more of extra bandwidth, the ZyXEL 
Device divides the total 3072 kbps total of unbudgeted and unused bandwidth equally 
between the sales and marketing departments (1536 kbps extra to each for a total of 3584 
kbps for each) because they both have the highest priority level. 

Table 70   Maximize Bandwidth Usage Example

Root Class: 10240 kbps

Administration: 2048 kbps

Sales: 2048 kbps

Marketing: 2048 kbps

Research: 2048 kbps

Table 71   Priority-based Allotment of Unused and Unbudgeted Bandwidth Example

Root Class: 10240 kbps

Administration: Priority 4, 1024 kbps

Sales: Priority 6, 3584 kbps

Marketing: Priority 6, 3584 kbps

Research: Priority 5, 2048 kbps