ZyXEL ISG50-PSTN User Guide - Page 400
Con d Rate Effect, Priority Effect, Maximize Bandwidth Usage Effect
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Chapter 25 Bandwidth Management 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 261 Bandwidth Management Behavior 1000 kbps ISG 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 129 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 130 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 Maximize Bandwidth Usage Effect With maximize bandwidth usage enabled, after each server gets its configured rate, the rest of the available bandwidth is divided equally between the two. So server A gets its configured rate of 300 kbps and server B gets its configured rate of 200 kbps. Then the ISG50 divides the remaining bandwidth (1000 - 500 = 500) equally between the two (500 / 2 = 250 kbps for each). The priority has no effect on how much of the unused bandwidth each server gets. So server A gets its configured rate of 300 kbps plus 250 kbps for a total of 550 kbps. Server B gets its configured rate of 200 kbps plus 250 kbps for a total of 450 kbps. Table 131 Maximize Bandwidth Usage Effect POLICY CONFIGURED RATE MAX. B. U. A 300 kbps Yes B 200 kbps Yes PRIORITY 1 2 ACTUAL RATE 550 kbps 450 kbps 400 ISG50 User's Guide
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