D-Link DWS-3160-24TC Cli Reference Manual page 332

DWS-3160 Series Gigabit Ethernet Unified Switch CLI Reference Guide
match the system's own IP address. In this case, the system knows that somebody out there uses
an IP address that is conflict with the system. In order to reclaim the correct host of this IP address,
the system can send out the gratuitous ARP request packet for this duplicate IP address.
Format
config gratuitous_arp send dup_ip_detected [enable | disable]
Parameters
enable - Enable sending of gratuitous ARP when duplicate IP is detected.
disable - Disable sending of gratuitous ARP when duplicate IP is detected.
Restrictions
Only Administrators, Operators and Power-Users can issue this command.
Example
To enable send gratuitous ARP request when duplicate IP is detected:
DWS-3160-24PC:admin# config gratuitous_arp send dup_ip_detected enable
Command: config gratuitous_arp send dup_ip_detected enable
Success.
DWS-3160-24PC:admin#
31-3 config gratuitous_arp learning
Description
This command is used to enable or disable learning of ARP entry in ARP cache based on the
received gratuitous ARP packet. Normally, the system will only learn the ARP reply packet or a
normal ARP request packet that asks for the MAC address that corresponds to the system's IP
address. The gratuitous ARP packet is sent by a source IP address that is identical to the IP that
the packet is queries for.
NOTE: With the gratuitous ARP learning, the system will not learn new entry but
only do the update on the ARP table based on the received gratuitous ARP packet.
Format
config gratuitous_arp learning [enable | disable]
Parameters
enable - Enable learning of ARP entry based on the received gratuitous ARP packet.
disable - Disable learning of ARP entry based on the received gratuitous ARP packet. This is the
default option.
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