Checking and Modifying Configuration of the "Discarding Gratuitous ARP Packets" Function on H3C Switches

This section describes how to check and modify configuration of the "discarding gratuitous ARP packets" function on H3C switches in NAS scenarios. The following uses H3C S5820V2-52QF-U switches as an example.

Upgrade Requirements

When H3C switches are interconnected in the network, you need to disable the "discarding gratuitous ARP packets" function on H3C switches before performing an online upgrade.

Procedure

Go to the 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 undo gratuitous-arp-learning enable 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:
gratuitous-arp-learning enable
Run the following command to save the configuration:
save
Run the following command to exit the system-view view:
quit