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Configuration Guide - Security

S1720, S2700, S5700, and S6720 V200R011C10

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, URPF, keychain, MPAC, separating the management plane from the service plane, security risks, PKI.
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Configuring the Alarm Function for Potential ARP Attacks

Configuring the Alarm Function for Potential ARP Attacks


After rate limiting on ARP packets based on the source IP address is enabled, if the number of ARP packets the device receives per second exceeds the limit, the device discards the excess ARP packets. The device considers the excess ARP packets as potential attacks. The device sends ARP alarms indicating potential attacks to the NMS. To avoid excessive alarms when ARP attacks occur, reduce the alarm quantity by setting a proper interval for sending alarms.


The configuration takes effect only on the alarm for ARP rate limit based on source IP addresses (corresponding to arp speed-limit source-ip). The other ARP alarms are generated at a fixed interval of 5 seconds.


  1. Run the system-view command to enter the system view.
  2. Run the arp anti-attack log-trap-timer time command to set the interval for sending ARP alarms.

    The default interval for sending alarms is 0, indicating that the device does not send ARP alarms.

Updated: 2019-10-21

Document ID: EDOC1000178177

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