ZyXEL UAG4100 User Guide - Page 369
Maximize Bandwidth Usage, Bandwidth Management Behavior, Con d Rate Effect, Priority Effect
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Chapter 31 Bandwidth Management 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 A's traffic and policy B for server B's traffic. Figure 254 Bandwidth Management Behavior 1000 kbps BWM 1000 kbps 1000 kbps 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. Table 161 Configured Rate Effect POLICY CONFIGURED RATE A 300 kbps B 200 kbps MAX. B. U. No No PRIORITY 1 1 ACTUAL RATE 300 kbps 200 kbps 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 162 Priority Effect POLICY CONFIGURED RATE A 800 kbps B 1000 kbps MAX. B. U. Yes Yes PRIORITY 1 2 ACTUAL RATE 800 kbps 200 kbps UAG Series User's Guide 369