SEND_ARP(8)SEND_ARP(8)NAME
send_arp - tool to notify network of a new IP address / MAC address
mapping
SYNOPSIS
send_arp takes the supplied data and sends it out as an arp broadcast
on the specified network device. This tool is mostly used by software
(such as piranha) that manipulates virtual IP addresses and needs to
notify the network that the device servicing an IP address has changed.
send_arp [-i ARG"]old-ip-addrold-mac-addrnew-ip-addrnew-mac-addr"
DESCRIPTION
send_arp sends out an arp broadcast on the specified network device
(defaults to eth0), reporting an old and new IP address mapping to a
MAC address. This is most useful in situations involving virtual IP
addresses, where the network device servicing that address has changed,
and other network arp caches need to be notified about it. All the data
is specified in the command line and is simply passed along in an arp
message frame. Since the old and new data specified can contain the
same information, this tool can also be used to refresh arp caches or
send periodic broadcasts.
send_arp simply takes the specified arguments and places them in an
ethernet arp broadcast.is a daemon used by pulse to monitor the running
status of the specified services on clustered servers. This tool has
NO error checking and should not be run without the direct supervision
of pulse!
OPTIONS-iARG Optional. Indicates the network device to send the arp broadcast
on. If omitted, the program defaults to eth0.
old-ip-addr
The original IP address (specified in nnn.nnn.nnn.nnn format)
that the MAC address specified in "old-mac-addr" had mapped to
it.
old-mac-addr
The MAC address that was servicing the IP address specified in
"old-ip-addr". The MAC address is specified in hex, and can be
formatted with or without colon (":") separators.
new-ip-addr
The new IP address (specified in nnn.nnn.nnn.nnn format) that
the MAC address specified in "new-mac-addr" now has mapped to
it.
new-mac-addr
The MAC address that is now servicing the IP address specified
in "new-ip-addr". The MAC address is specified in hex, and can
be formatted with or without colon (":") separators.
AUTHOR
send_arp: Yuri Volobuev 1997
man page: Keith Barrett <kbarrett@redhat.com>
4th Berkeley Distribution Thu May 10 2001 SEND_ARP(8)