Panasonic GA-ML Series, Manual

Page: 184 / 496

182
6 L3 Features
6.2 Gratuitous ARP
6.2 Gratuitous ARP
Use the following window to implement the settings on gratuitous ARP
and display its settings. Gratuitous ARP request packets are the ARP
request packets whose destination MAC address is a broadcast address;
an IP address of the source and destination for gratuitous ARP packets is
configured on an IP address of a transmission device. The device uses ARP
request packets to accurately check if the IP address has duplications with
other hosts. Alternatively, the device reconfigures or loads the ARP cache
entries of the host connected to an interface, in advance.
Choose L3 Features > Gratuitous ARP to display the following window.
Figure 6-4 Gratuitous ARP
In the section of Gratuitous ARP Global Settings , you can configure the
following parameters.
Click Apply to reflect the change.
Parameter Overview
IP Gratuitous ARP
State This parameter enables or disables to transmit
gratuitous ARP request packets.
Gratuitous ARP
Trap State This parameter enables or disables the trap state of a
gratuitous ARP function.
IP Gratuitous ARP
Dad-Reply State This parameter enables or disables the IP gratuitous
ARP Dad-Reply state.
Gratuitous ARP
Learning State This parameter enables or disables the gratuitous ARP
learning state.
Normally, this system learns the ARP
entries, only, from the normal ARP-request packets,
which require a MAC address and an IP address of the
ARP entry from ARP request packets or a switch.
Use
this option to enable or disable to learn the ARP entries
based on the gratuitous ARP packets received. A source
IP address transmits gratuitous ARP packets to become
the same with the IP address where packets are (on) the
queried state.