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Configuration Guide - Security

S7700 and S9700 V200R011C10

This document describes the configurations of Security, including ACL, reflective ACL, local attack defense, MFF, attack defense, traffic suppression and storm control, ARP security, port security, DHCP snooping, ND snooping, PPPoE+, IPSG, SAVI, URPF, keychain, separating the management plane from the service plane, security risks.
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Setting the Packet Sampling Ratio for Attack Source Tracing

Setting the Packet Sampling Ratio for Attack Source Tracing

Context

Attack source tracing identifies attacks by sampling received packets. A proper packet sampling ratio can reduce the errors in attack packet identification and packet rate calculation. A small sampling ratio makes the attack source tracing result accurate, but increases CPU usage.

For example, when the sampling ratio is set to 1, the attack source tracing result is accurate, but the CPU usage is high because every packet is analyzed. Therefore, balance between the attack defense precision and CPU usage when setting a sampling ratio.

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. Run auto-defend enable

    Attack source tracing is enabled.

    By default, attack source tracing is enabled.

  4. Run auto-defend attack-packet sample sample-value

    The sampling ratio for attack source tracing is set.

    By default, the packet sampling ratio is 5.

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Updated: 2019-04-01

Document ID: EDOC1000178319

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