Operation Manual – ARPH3C S5500-EI Series Ethernet Switches Chapter 1 ARP Configuration1-61.2.5 ARP Configuration ExampleI. Network requirementsz Enable the ARP entry check.z Set the aging time for dynamic ARP entries to 10 minutes.z Set the maximum number of dynamic ARP entries that VLAN-interface 10 canlearn to 1000.z Add a static ARP entry, with the IP address being 192.168.1.1/24, the MACaddress being 000f-e201-0000, and the outbound port being GigabitEthernet1/0/10 of VLAN 10.II. Configuration procedure system-view[Sysname] arp check enable[Sysname] arp timer aging 10[Sysname] vlan 10[Sysname-vlan10] port gigabitethernet 1/0/10[Sysname-vlan10] quit[Sysname] interface vlan-interface 10[Sysname-vlan-interface10] arp max-learning-num 1000[Sysname-vlan-interface10] quit[Sysname] arp static 192.168.1.1 000f-e201-0000 10 gigabitethernet1/0/101.3 Configuring Gratuitous ARP1.3.1 Introduction to Gratuitous ARPA gratuitous ARP packet is a special ARP packet, in which the source IP address anddestination IP address are both the IP address of the sender, the source MAC addressis the MAC address of the sender, and the destination MAC address is a broadcastaddress.A device can implement the following functions by sending gratuitous ARP packets:z Determining whether its IP address is already used by another device.z Informing other devices of its MAC address change so that they can update theirARP entries.A device receiving a gratuitous ARP packet can add the information carried in thepacket to its own dynamic ARP mapping table if it finds no corresponding ARP entry forthe ARP packet in the cache.1.3.2 Configuring Gratuitous ARPFollow these steps to configure gratuitous ARP:
