ZyXEL p-660hwp Manual Do Utilizador

Chapter 15 Bandwidth Management

P-660HWP-Dx User’s Guide

Here is an example of a P-660HWP-Dx 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 P-660HWP-Dx 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 P-660HWP-Dx also divides the remaining 1024 kbps among the classes that require more 
bandwidth. Therefore, the P-660HWP-Dx 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 P-660HWP-
Dx 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. 

• Research requires more bandwidth but only gets its budgeted 2048 kbps because all of the 

unbudgeted and unused bandwidth goes to the higher priority sales and marketing classes. 

Table 86   Maximize Bandwidth Usage Example

Root Class: 10240 kbps

Administration: 2048 kbps

Sales: 2048 kbps

Marketing: 2048 kbps

Research: 2048 kbps

Table 87   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