H3C Technologies H3C SecPath F1000-E - Manual (Page 504)

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address or a manually configured secondary IP address of the sending interface on the subinterfaces.
In this way, when a VRRP failover occurs, devices in the VLANs having ambiguous VLAN termination
configured can use the gratuitous ARP packets to update their corresponding MAC entries in time.
NOTE:
For details about VRRP, refer to VRRP Configuration.
Configuring Periodic Sending of Gratuitous ARP Packets
Select Firewall > ARP Anti-Attack > Send Gratuitous ARP from the navigation tree to enter the
Send Gratuitous ARP page, as shown in
Figure 11 .
Figure 11 Configure periodic sending of gratuitous ARP packets
Table 3 describes the configuration items for periodic sending of gratuitous ARP packets.