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HP-UX 11i Version 3: February 2007

Technical documentation

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rarpd — Reverse Address Resolution Protocol daemon


rarpd [-d] [-f config_file] [interface_name]


rarpd, the Reverse Address Resolution Protocol daemon, implements the server portion of the Reverse Address Resolution Protocol [1]. It responds to RARP requests providing the requested client IP address. Rarpd can be started during boot-time initialization. To do so, set the RARPD variable with RARPD=1 in /etc/rc.config.d/netconf.

Options are:


Print debugging information.

-f config_file

Use the specified config_file database instead of /etc/rarpd.conf.


Respond to requests over just this interface.

The configuration file database contains hardware address to IP address mappings. Other than comment lines (which begin with a '#') and blank lines, all lines are considered client entries. A client entry is of the form:

hardware_address WHITE_SPACE ip_address

where hardware_address consists of (:) colon-separated hexadecimal bytes, and ip_address consists of (.) dot-seperated decimal bytes. For example:

# # hardware addr IP addr # # ethernet clients 08:00:09:26:ec:19 08:00:09:17:0a:93 # # 100VG clients 08:00:09:63:5d:f5 # # FDDI clients 08:00:09:09:53:4c

There must be exactly 6 hardware address bytes. There must be exactly 4 protocol address bytes.

The following signals have the specified effect when sent to the rarpd process using the kill(1) command:


Causes server to read the config file and reload database.


Dumps current data base and cache to /var/tmp/rarpd.db.


Exit status is 1 if the command fails, and error messages are written to stderr and/or syslog. Typically, the daemon will continue answering requests until externally interrupted.



The rarpd daemon supports only ethernet, 100VG and FDDI network interfaces.


The rarpd daemon supports only 4 byte Internet Protocol addresses.


The rarpd and rarpc programs cannot be run on the same interface at the same time.


rarpd was developed by HP.



[1] R. Finlayson, T. Mann, J.C. Mogul, M. Theimer, "Reverse Address Resolution Protocol", RFC 903.

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