No relevant resource is found in the selected language.

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies. Read our privacy policy>Search


To have a better experience, please upgrade your IE browser.


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.
Rate and give feedback:
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).
Services Are Interrupted Due to Incorrect IP Address Wildcard Mask

Services Are Interrupted Due to Incorrect IP Address Wildcard Mask

Fault Description

A traffic policy has been configured on a device to filter packets. To filter the packets from a certain IP address, the administrator adds a rule to the ACL used by the traffic policy following the ACL configuration guidelines. The new rule uses this source IP address as the matching condition. However, the IP address wildcard mask in the rule is incorrectly configured. As a result, all IP packets are discarded and services are interrupted.


  1. Run the display this command in the ACL view to check the new rule.

    The new rule is as follows:

    rule 100 permit ip source

    The IP address wildcard mask is, which is not an inverse mask. This rule is equivalent to "rule 100 permit ip/rule 100 permit ip source any", meaning that packets from any IP address are matched.

    The traffic policy using this ACL has been applied to a large number of interfaces, so all IP packets received by these interfaces are discarded. Services are interrupted.

  2. Run the rule (advanced ACL view) command in the ACL view to modify the IP address wildcard mask in the new rule.

    The modified rule is as follows:

    rule 100 permit ip source //indicates the IP address of a single host only when the IP address wildcard mask is

    Services are recovered, and packets from source IP address are discarded.

Updated: 2019-09-23

Document ID: EDOC1000178319

Views: 150824

Downloads: 82

Average rating:
This Document Applies to these Products
Related Documents
Related Version
Previous Next