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 arp(1M)							     arp(1M)




 NAME
      arp - address resolution display and control

 SYNOPSIS
      arp hostname

      arp -a[n] [system] [core]

      arp [-d | -D] hostname

      arp -f filename

      arp -s hostname hw_address [temp] [pub] [rif rif_address]

      arp -sfc hostname nport_id

 DESCRIPTION
      The arp command displays and modifies the Internet-to-Ethernet and
      Internet-to-Fibre Channel address translation tables used by the
      Address Resolution Protocol (ARP).

    Options
      arp has the following keyletter options:

	   hostname  (first form above) Display the current ARP entry for
		     hostname, which must appear in the hostname database
		     (see hosts(4)), or for the DARPA Internet address
		     expressed in Internet standard "dot" notation.

	   -a[n]     Display all current ARP entries by reading the table
		     from file core (default /dev/kmem) based on the kernel
		     file system (default /stand/vmunix).  The -an option
		     provides the same information as the -a option except
		     that network addresses are not displayed symbolically.

	   -d	     If an ARP entry exists for the host called hostname,
		     delete it. This option cannot be used to delete a
		     permanent ARP entry whose IP address is an interface on
		     the local system.

	   -D	     (Not recommended). Delete a permanent ARP entry whose
		     IP address is an interface on the local system.  The
		     removal of such an ARP entry may result in loss or
		     limitation of network connectivity with remote
		     machines. The local system will no longer respond to
		     ARP requests for this IP address.	Consequently,
		     communication with remote systems is possible only when
		     that communication is initiated by the local system.
		     This option should be used with extreme caution.





 Hewlett-Packard Company	    - 1 -   HP-UX Release 11i: November 2000






 arp(1M)							     arp(1M)




	   -f	     Read file filename and set multiple entries in the ARP
		     tables.  Fibre Channel entries in the file should be of
		     the form:

			  -sfchostname nport_id

		     Other entries in the file should be of the form:

			  hostname hw_address
			  [temp]
			  [pub]
			  [rif
			  rif_address]

		     The argument meanings are the same as for the -s
		     option.

	   -s	     Create an ARP entry for the host called hostname with
		     the hardware station address hw_address.  The hardware
		     station address is given as six hexadecimal bytes
		     separated by colons.  If an ARP entry already exists
		     for hostname, the existing entry is updated with the
		     new information.

		     The entry is permanent unless the word temp is given in
		     the command.

		     If the word pub is specified, the entry is published,
		     which means that this system will act as an ARP server
		     responding to requests for hostname even though the
		     host address is not its own.

		     The word rif specifies source routing information used
		     for token ring networks.  This information allows you
		     to specify the particular bridge route which the token
		     ring packet should be delivered.  rif_address is given
		     as an even number of hexadecimal bytes separated by
		     colons, up to a maximum of 16 bytes.

	   -sfc	     Create a permanent ARP entry for the Fibre Channel host
		     called hostname with the N_Port address nport_id. The
		     N_Port address is given as three hexadecimal bytes
		     separated by colons.  If an ARP entry already exists
		     for hostname, the existing entry is updated with the
		     new information.

      You need superuser privilege to use the -d, -D, -f, -s and -sfc
      options.

 AUTHOR
      arp was developed by HP and the University of California, Berkeley.



 Hewlett-Packard Company	    - 2 -   HP-UX Release 11i: November 2000






 arp(1M)							     arp(1M)




 SEE ALSO
      ifconfig(1M), inet(3N), hosts(4), arp(7P).




















































 Hewlett-Packard Company	    - 3 -   HP-UX Release 11i: November 2000