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Configuration Guide - Security

CloudEngine 8800, 7800, 6800, and 5800 V200R005C10

This document describes the configurations of Security, including ACL, local attack defense, MFF, attack defense, traffic suppression and storm control, ARP security, Port security, DHCP snooping, ND snooping, PPPoE+, IPSG, SAVI, separating the management plane from the service plane, security risks.
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Configuring Rules for the Switch to Limit the Rate of Packets in Enhanced Mode

Configuring Rules for the Switch to Limit the Rate of Packets in Enhanced Mode

Context

After an attack defense policy is created, the device can limit the rate of packets or discard packets in either of the following modes:
  • Non-enhanced mode: The device uses the CPU to limit the rate of packets or discard packets, which greatly affects CPU performance.
  • Enhanced mode: The device uses a built-in chip to limit the rate of packets or discard packets, which therefore does not affect CPU performance and is not affected by other packets sent to the CPU, improving performance of corresponding features.

To reduce impact on the CPU and improve performance of corresponding features, you can configure rules for the device to limit the rate of packets in enhanced mode.

NOTE:

This function can only be configured on the CE6875EI.

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run cpu-defend policy policy-name

    The attack defense policy view is displayed.

  3. Configure rules for the switch to limit the rate of packets in enhanced mode.

    • Run car enp packet-type packet-type pps pps-value

      The rate limit of packets in enhanced mode is configured.

      By default, the rate limit of packets in enhanced mode is 20,000 pps. You can run the display cpu-defend configuration enp command to view the rate limit of packets.

    • Run deny enp packet-type packet-type

      Packets discarded by the device in enhanced mode are configured.

      By default, the device does not discard packets, and uses the default value of the devicename-default policy to limit the rate of packets. You can run the display cpu-defend configuration enp command to view the rate limit of packets.

    If both the car enp packet-type packet-type pps pps-value and deny enp packet-type packet-type commands are run for a specified type of packets, the command configured later takes effect.

  4. Run commit

    The configuration is committed.

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Updated: 2019-04-20

Document ID: EDOC1100074765

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