Rate Limiting

Examples of Adaptive Rate Limiting Applications

The following sections show some examples of how you can use Adaptive Rate Limiting. The CLI commands for implementing each application are shown in “Complete CLI Examples” on page 4-18.

Adaptive Rate Policies For an Uplink

Figure 4.2 shows an example of how you can use the Adaptive Rate Limiting. In this example, four rate policies are applied to the device’s uplink to the Internet. In this case, the uplink is a trunk group consisting of two one- Gigabit Ethernet ports.

Internet

Internet access router

Rate policies are applied to a trunk group of two one- Gigabit ports (ports 1/1 and 1/2)

Rate Policies on Trunk Group (ports 1/1 and 1/2)

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Inbound TCP traffic

-Normal Burst - set IP precedence to 5 and forward -Excess Burst - set IP precedence to 0 and forward

Inbound FTP traffic

-Normal Burst - set IP precedence to 5 and forward -Excess Burst - drop

Outbound DNS traffic

-Normal Burst - set IP precedence to 5 and forward -Excess Burst - drop

All other IP traffic

-Normal Burst - set IP precedence to 5 and forward -Excess Burst - drop

Figure 4.2 Adaptive Rate Limiting applied to uplink

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