TP-Link T1600G-28PS Jetstream Smart Switches User Guide - Page 534

Configuring ARP ARP Configurations ■■ Viewing ARP Entries On privileged EXEC mode or any other configuration mode, you can use the following command to view ARP entries: show arp [ip] [mac] ip: Specify the IP address of your desired ARP entry. mac: Specify the MAC address of your desired ARP entry. show ip arp { fastEthernet port | gigabitEthernet port | ten-gigabitEthernet port | port-channel lagid | vlan vid } Verify the active ARP entries associated with a Layer 3 interface. port: Specify the number of the routed port. lagid: Specify the ID of the LAG. vid: Specify the VLAN interface ID. 2.2.2 Configuring the Gratuitous ARP ■■ Configuring Gratuitous ARP Globally Follow these steps to add static ARP entries: Step 1 configure Enter global configuration mode. Step 2 gratuitous-arp intf-status-up enable Enable the Layer 3 interface to send a gratuitous ARP packet to detect if its IP address is used by other devices. It is enabled by default Step 3 gratuitous-arp dup-ip-detected enable (Optional) Enable the Layer 3 interface to send a gratuitous packet when the interface received a gratuitous ARP packet with the same IP address with its own. It is disabled by default. Step 4 gratuitous-arp learning enable (Optional) Enable the switch to learn MAC address entries from gratuitous ARP packets. Generally, the switch only learn MAC address entries form normal ARP packets. With this option enabled, the switch will also learn MAC address entries from gratuitous ARP packets. By default, it is disabled. Step 5 show gratuitous-arp Show the gratuitous ARP configuration. Step 6 end Return to privileged EXEC mode. Step 7 copy running-config startup-config Save the settings in the configuration file. This example shows how to enable Send on IP Interface Status Up, Send on Duplicate IP Detected and Gratuitous ARP Learning features: User Guide 509