Chapter 20 Bandwidth Management
4If the bandwidth requirements of all of the traffic classes are met and there is still some unbudgeted bandwidth, the ZyWALL assigns it to traffic that does not match any of the classes.
20.10Over Allotment of Bandwidth
It is possible to 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.
Table 130 Over Allotment of Bandwidth Example
BANDWIDTH CLASSES, ALLOTMENTS | PRIORITIES | ||
Actual outgoing bandwidth available on the interface: 1000 kbps |
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Root Class: 1500 kbps (same | VoIP traffic (Service = SIP): 500 Kbps | 7 | |
as Speed setting) |
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NetMeeting traffic (Service = H.323): 500 kbps | 7 | ||
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| FTP (Service = FTP): 500 Kbps | 3 | |
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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.
20.11 Configuring Summary
Click ADVANCED > BW MGMT to open the Summary screen.
Enable bandwidth management on an interface and set the maximum allowed bandwidth for that interface.
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ZyWALL 2WG User’s Guide | |
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