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P-662H/HW-D Series User’s Guide

Chapter 19 Bandwidth Management 297

• 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.

19.6.2.2 Fairness-based Allotment of Unused and Unbudgeted Bandwidth

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.

19.6.3 Bandwidth Management Priorities

The following table describes the priorities that you can apply to traffic that the ZyXEL

Device forwards out through an interface.

19.7 Configuring Summary

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

BANDWIDTH CLASSES AND ALLOTMENTS

Root Class: 10240 kbps Administration: 1024 kbps

Sales: 3072 kbps

Marketing: 3072 kbps

Research: 3072 kbps

Table 119 Bandwidth Management Priorities

PRIORITY LEVELS: TRAFFIC WITH A HIGHER PRIORITY GETS THROUGH FASTER WHILE

TRAFFIC WITH A LOWER PRIORITY IS DROPPED IF THE NETWORK IS CONGESTED.

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.

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