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  4. send_arp(8)

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SEND_ARP(8) System Manager's Manual 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



  

  
Optional. Indicates the network device to send the arp broadcast on. If
      omitted, the program defaults to eth0.

  

  
The original IP address (specified in nnn.nnn.nnn.nnn format) that the MAC
      address specified in "old-mac-addr" had mapped to it.

  

  
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.

  

  
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.

  

  
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>







  

    Thu May 10 2001
    4th Berkeley Distribution