Operation Manual – ARPH3C S3100 Series Ethernet Switches Chapter 1 ARP Configuration1-11Operation Command RemarksConfigure the port stateauto-recovery intervalarp protective-downrecover interval intervalOptionalBy default, when the portstate auto-recoveryfunction is enabled, theport state auto-recoveryinterval is 300 seconds.Note:z You need to enable the port state auto-recovery feature before you can configurethe port state auto-recovery interval.z You are not recommended to configure the ARP packet rate limit function on theports of an aggregation group.1.3 Gratuitous ARP Packet ConfigurationTable 1-8 Configure the gratuitous ARP packetOperation Command RemarksEnter system view system-view —Enable the gratuitousARP packet learningfunctiongratuitous-arp-learningenableRequiredBy default, the gratuitous ARPpacket learning function isdisabled.Note:The sending of gratuitous ARP packets is enabled as long as an S3100 switchoperates. No command is needed for enabling this function. That is, the device sendsgratuitous ARP packets whenever a VLAN interface is enabled (such as when a link isenabled or an IP address is configured for the VLAN interface) or whenever the IPaddress of a VLAN interface is changed.1.4 Displaying and Debugging ARPAfter the above configuration, you can execute the display command in any view todisplay the running of the ARP configuration, and to verify the effect of theconfiguration.You can execute the reset command in user view to clear ARP entries.