Zyxel UAG4100 [369/617] Bandwidth management behavior

Zyxel UAG4100 [369/617] Bandwidth management behavior
Chapter 31 Bandwidth Management
UAG Series User’s Guide
369
Maximize Bandwidth Usage
Maximize bandwidth usage allows applications with maximize bandwidth usage enabled to “borrow”
any unused bandwidth on the out-going interface.
After each application gets its configured bandwidth rate, the UAG uses the fairness- based
scheduler to divide any unused bandwidth on the out-going interface amongst applications that
need more bandwidth and have maximize bandwidth usage enabled.
Unused bandwidth is divided equally. Higher priority traffic does not get a larger portion of the
unused bandwidth.
Bandwidth Management Behavior
The following sections show how bandwidth management behaves with various settings. For
example, you configure LAN1 to WAN policies for FTP servers A and B. Each server tries to send
1000 kbps, but the WAN is set to a maximum outgoing speed of 1000 kbps. You configure policy A
for server As traffic and policy B for server Bs traffic.
Figure 254 Bandwidth Management Behavior
Configured Rate Effect
In the following table the configured rates total less than the available bandwidth and maximize
bandwidth usage is disabled, both servers get their configured rate.
Priority Effect
Here the configured rates total more than the available bandwidth. Because server A has higher
priority, it gets up to it’s configured rate (800 kbps), leaving only 200 kbps for server B.
Table 161 Configured Rate Effect
POLICY CONFIGURED RATE MAX. B. U. PRIORITY ACTUAL RATE
A 300 kbps No 1 300 kbps
B 200 kbps No 1 200 kbps
Table 162 Priority Effect
POLICY CONFIGURED RATE MAX. B. U. PRIORITY ACTUAL RATE
A 800 kbps Yes 1 800 kbps
B 1000 kbps Yes 2 200 kbps
1000 kbps
1000 kbps
BWM
1000 kbps

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