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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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The Blacklist Does Not Take Effect

The Blacklist Does Not Take Effect

Fault Description

The configured blacklist does not take effect.

Common Causes

Possible causes are as follows:
  • Packets do not match the rules in the blacklist.
  • ACL resources are insufficient.


  1. Run the display cpu-defend policy [ policy-name ] command to check the attack defense policy.
  2. Check the ACL of the blacklist in the displayed attack defense policy information, and run the display acl acl-number command to check whether service packets match the ACL rule.
  3. If service packets do not match the ACL rule, run the rule command in the ACL view to modify the ACL rule. If service packets match the ACL rule, the blacklist may fail to be applied because ACL resources are insufficient.
Updated: 2019-04-20

Document ID: EDOC1100074765

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