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Fat AP and Cloud AP V200R008C00 CLI-based Configuration Guide

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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Configuring Traffic Suppression

Configuring Traffic Suppression

Traffic suppression prevents broadcast storms and ensures device forwarding performance.

Configuring Traffic Suppression on an Interface

Context

To limit the rate of incoming and outgoing packets and prevent broadcast storms, configure traffic suppression on an interface.

Pre-configuration Tasks
Before configuring traffic suppression on an interface, complete the following task:
  • Configuring link layer protocol parameters for interfaces to ensure that the link layer protocol status on the interfaces is Up

Procedure

  1. Run:

    system-view

    The system view is displayed.

  2. Run:

    interface interface-type interface-number

    The interface view is displayed.

  3. Run:

    { broadcast-suppression | multicast-suppression | unicast-suppression } packets packets-per-second

    Traffic suppression is configured.

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 an 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.

      The AP can limit the rate at which ICMP packets are received on GE interfaces and Eth-Trunk interfaces.

    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 an 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.

Checking the Configuration

Procedure

  • Run the display flow-suppression interface interface-type interface-number command to check the traffic suppression configuration.
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Updated: 2019-01-11

Document ID: EDOC1000176006

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