ZyXEL Communications HW-D Series User Manual

P-662H/HW-D Series User’s Guide

Chapter 19 Bandwidth Management

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• 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.

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

kbps of its budgeted 2048 kbps. 

• The ZyXEL Device 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 ZyXEL 
Device forwards out through an interface.

Click Advanced > Bandwidth MGMT to open the screen as shown next. 

Enable bandwidth management on an interface and set the maximum allowed bandwidth for 
that interface. 

Table 118   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 119   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.