Command Manual – ARPH3C S7500 Series Ethernet Switches Chapter 1 ARP Configuration Commands1-2ViewSystem viewParametersNoneDescriptionUse the arp gratuitous-updating enable command to enable gratuitous ARP packetsto be sent periodically.Use the undo arp gratuitous-updating enable command to disable gratuitous ARPpackets from being sent periodically. With this function enabled, the switch periodicallybroadcasts gratuitous ARP packets from the current interface IP address within theVLAN whose interfaces are configured with an IP address.By default, the switch is disabled from sending gratuitous ARP packets periodically.With VRRP enabled on a VLAN interface of a switch:z If the switch is the master switch, it sends gratuitous ARP messages with the IPaddress of the VRRP virtual router.z If it is not the master switch, it sends gratuitous ARP messages with the primaryand all the secondary IP addresses of the VLAN interface.Examples# Enable the switch to send gratuitous ARP packets periodically. system-viewSystem View: return to User View with Ctrl+Z.[H3C] arp gratuitous-updating enable1.1.3 arp mac-arp-map limitSyntaxarp mac-arp-map limit numberundo arp mac-arp-map limitViewSystem viewParametersnumber: Maximum number of IP addresses to be bound to a MAC address of a VLAN,in the range 1 to 8192.