ZyXEL Communications P-2602R-DxA Series User Manual

P-2602R/RL-DxA Series User’s Guide

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Chapter 16 Bandwidth Management

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. 

• 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. 

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.

Table 67   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

Table 68   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