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CLI-based Configuration Guide - Security

AR500, AR510, AR531, AR550, AR1500, and AR2500 V200R010

This document provides the basic concepts, configuration procedures, and configuration examples in different application scenarios of the network management feature supported by the device.
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Limiting the Rate of ICMP Packets

Limiting the Rate of ICMP Packets

Applicable Environment

The device receives a large number of ICMP packets from the network, and these packets consume a lot of CPU resources. Limiting the rate at which ICMP packets are received can help reduce the burden of the CPU, ensuring nonstop service transmission. After this function is configured, the device discards excess packets.

NOTE:

After rate limiting of ICMP packets is configured, the device may fail to respond to ping packets. To make suppression of ICMP packets take effect, disable the fast ICMP reply function.

Procedure

  • Configuring the global rate limit for ICMP packets
    1. Run system-view

      The system view is displayed.

    2. Run icmp rate-limit enable

      The global ICMP packet rate limiting function is enabled.

      By default, the global ICMP packet rate limiting function is disabled on a device.

    3. (Optional) Run icmp rate-limit threshold threshold-value

      The global rate limit for ICMP packets is set.

      By default, the global rate limit for ICMP packets is 100 pps.

  • Configuring the rate limit for ICMP packets on a specified interface
    1. Run system-view

      The system view is displayed.

    2. Run interface interface-type interface-number

      The interface view is displayed.

    3. Run icmp rate-limit enable

      The ICMP packet rate limiting function is enabled on the interface.

      By default, the ICMP packet rate limiting function is disabled on a device.

    4. (Optional) Run icmp rate-limit threshold threshold-value

      The highest rate at which ICMP packets are received on the interface is set.

      By default, the rate limit for ICMP packets on an interface is 100 pps.

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Updated: 2019-05-20

Document ID: EDOC1100034236

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