Enabling ARP logging

This feature enables a device to log ARP events when ARP cannot resolve IP addresses correctly. The log information helps administrators locate and solve problems. The device can log the following ARP events:

• On a proxy ARP-disabled interface, the target IP address of a received ARP packet is not one of the following IP addresses:

  • The IP address of the receiving interface.

  • The virtual IP address of the VRRP group.

  • The public IP address after NAT.

• The sender IP address of a received ARP reply conflicts with one of the following IP addresses:

  • The IP address of the receiving interface.

  • The virtual IP address of the VRRP group.

  • The public IP address after NAT.

The device sends ARP log messages to the information center. You can use the info-center source command to specify the log output rules for the information center. For more information about information center, see Network Management and Monitoring Configuration Guide.

1. Enter system view.

   system-view

2. Enable ARP logging.

   arp check log enable

   By default, ARP logging is disabled.