Checking and Modifying Configuration of the "Discarding Gratuitous ARP Packets" Function on Huawei Switches

This section describes how to check and modify configuration of the "discarding gratuitous ARP packets" function on Huawei switches in NAS scenarios. The following uses Huawei CE6850-48S4Q-EI switches as an example.

Upgrade Requirements

When Huawei switches are interconnected in the network, you need to disable the "discarding gratuitous ARP packets" function on Huawei switches before performing an online upgrade.

Procedure

Go to the command-line interface (CLI) and run the following command to check whether the "discarding gratuitous ARP packets" function is enabled on the switches:
display current-configuration

Check whether arp anti-attack gratuitous-arp drop is displayed in the command output. If yes, the "discarding gratuitous ARP packets" function is enabled on the switches. Otherwise, the function is disabled.
If the "discarding gratuitous ARP packets" function is enabled on the switches, an online upgrade cannot be performed.

Suggestions

If the "discarding gratuitous ARP packets" function is enabled on the switches, contact technical support engineers to evaluate the impact of modification and then perform the following operations:

Run the following command to go to the system-view view:
system-view
Run the following command to disable the "discarding gratuitous ARP packets" function:
undo arp anti-attack gratuitous-arp drop
Run the following command to exit the system-view view:
quit
Run the following command to save the configuration:
save