3Com Switch 7750 SeriesCommand Reference Guide – ARP Chapter 1 ARP Configuration Commands1-14DescriptionUse the gratuitous-arp-learning enable command to enable the gratuitous ARPpacket learning function.Use the undo gratuitous-arp-learning enable command to disable the gratuitousARP packet learning function.By default, the gratuitous ARP packet learning function is enabled.With the gratuitous ARP packet learning function enabled, a switch operates as followswhen receiving a gratuitous ARP packet:If the cache of the switch contains ARP mapping entries that match the packet, theswitch updates the ARP mapping entries using the sender hardware address carried inthe gratuitous ARP packet.If no ARP mapping entry in the cache matches the packet, an ARP mapping entrycorresponding to the packet is created.Example# Enable the gratuitous ARP packet learning function on the switch named 3ComA.<3ComA> system-viewSystem View: return to User View with Ctrl+Z.[3ComA] gratuitous-arp-learning enable1.1.19 reset arpSyntaxreset arp [ dynamic | static | interface interface-type interface-number ]ViewUser viewParameterdynamic: Clears dynamic ARP mapping entries.static: Clears static ARP mapping entries.interface-type: Port type.interface-number: Port number.DescriptionUse the reset arp command to clear specific ARP mapping entries.Related command: arp static, display arp.
