ZyXEL Communications P-660HW-T - V2, User Manual

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P-660HW-T v2 User’s Guide
184 Chapter 13 Bandwidth Management
13.7 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.
13.8 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 102 Bandwidth Management: Summary
Table 70 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