mainGNU Gratuitous ARP Daemon - Summary

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Group identification
Id: 8854
System Name: garpd
Name: GNU Gratuitous ARP Daemon
Group Type: Official GNU software

This software is part of the GNU Project.

Broadcasts Gratuitous ARPs for a list of MAC address <-> IP address
mappings on specified interfaces at regular intervals.

A gratuitous ARP request is an AddressResolutionProtocol request
packet where the source and destination IP are both set to the IP of
the machine issuing the packet and the destination MAC is the
broadcast address ff:ff:ff:ff:ff:ff. Ordinarily, no reply packet will
occur. Gratuitous ARP reply is a reply to which no request has been

Gratuitous ARPs are useful to update ARP tables of switches, routers
and other hosts to route packets to a designated IP address.

Garpd was developed as a part of GNU FreeIPMI project. Some of the
IPMI implementations doesn't implement GARP broadcast functionality in
their NICS. When the host OS is down and BMC is active listening for
IPMI packets on the NIC, it needs to inform other switches/routers to
route packets to its NIC. Because Garpd is useful for other purposes
too, we decided to make it as a separate project.

Registration Date: Sun 22 Oct 2006 06:48:29 PM UTC
License: GNU General Public License v3 or later
Development Status: 5 - Production/Stable


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