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7 over allotment of bandwidth, 8 configuring summary, Figure 153 bandwidth management: summary – ZyXEL Communications P-2608HWL-Dx Series User Manual

Page 282: Table 110 over allotment of bandwidth example

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P-2608HWL-Dx Series User’s Guide

282

Chapter 21 Bandwidth Management

21.7 Over Allotment of Bandwidth

You can set the bandwidth management speed for an interface higher than the interface’s
actual transmission speed. Higher priority traffic gets to use up to its allocated bandwidth,
even if it takes up all of the interface’s available bandwidth. This could stop lower priority
traffic from being sent. The following is an example.

If you use VoIP and NetMeeting at the same time, the device allocates up to 500 Kbps of
bandwidth to each of them before it allocates any bandwidth to FTP. As a result, FTP can only
use bandwidth when VoIP and NetMeeting do not use all of their allocated bandwidth.

Suppose you try to browse the web too. In this case, VoIP, NetMeeting and FTP all have
higher priority, so they get to use the bandwidth first. You can only browse the web when
VoIP, NetMeeting, and FTP do not use all 1000 Kbps of available bandwidth.

21.8 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.

Figure 153 Bandwidth Management: Summary

Table 110 Over Allotment of Bandwidth Example

BANDWIDTH CLASSES, ALLOTMENTS

PRIORITIES

Actual outgoing bandwidth available on the interface: 1000 kbps

Root Class: 1500 kbps (same

as Speed setting)

VoIP traffic (Service = SIP): 500 Kbps

High

NetMeeting traffic (Service = H.323): 500 kbps

High

FTP (Service = FTP): 500 Kbps

Medium