Operation Manual – ARPH3C S7500 Series Ethernet Switches Chapter 1 ARP Configuration1-9To do… Use the command… RemarksEnter system view system-view —Enable gratuitous ARPpackets to be sentperiodicallyarp gratuitous-updatingenableRequiredBy default, this function isdisabled on the switch.Set a gratuitous ARPupdate intervalarp timergratuitous-updatingupdating-intervalOptionalThe gratuitous ARPupdate interval defaults tofive minutes after thisfunction is enabled.Note: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 primary andall the secondary IP addresses of the VLAN interface.1.2.7 Configuring Gratuitous ARP LearningFollow these steps to enable gratuitous ARP learning:To do… Use the command… RemarksEnter system view system-view —Enable gratuitous ARPlearninggratuitous-arp-learningenableRequiredDisabled by default.1.2.8 Configuring ARP Attack DetectionFollow these steps to configure ARP attack detection:To do… Use the command… RemarksEnter system view system-view —Set the maximum numberof IP addresses to bebound to a MAC addressin a VLANarp mac-arp-map limitnumberRequiredBy default, the maximumnumber is 2.
