rarpd(1M)                                                         rarpd(1M)

NAME
     rarpd, in.rarpd - DARPA Reverse Address Resolution Protocol server

SYNOPSIS
     /usr/sbin/in.rarpd interface [hostname]

     /usr/sbin/in.rarpd -a

DESCRIPTION
     in.rarpd starts a daemon that responds to Reverse Address Resolution
     Protocol (RARP) requests. The daemon forks a copy of itself that runs
     in background. It must be run as root.

     RARP is used by machines at boot time to discover their Internet Pro-
     tocol (IP) address. The booting machine provides its Ethernet Address
     in a RARP request message. Using the ethers and hosts databases,
     in.rarpd maps this Ethernet Address into the corresponding IP address
     which it returns to the booting machine in an RARP reply message. The
     booting machine must be listed in both databases for in.rarpd to
     locate its IP address. in.rarpd issues no reply when it fails to
     locate an IP address.

     In the first synopsis, the interface parameter names the network
     interface upon which in.rarpd is to listen for requests. The interface
     parameter takes the "name unit" form used by ifconfig(1M). The second
     argument, hostname, is used to obtain the IP address of that inter-
     face. An IP address in "decimal dot" notation may be used for host-
     name. If hostname is omitted, the address of the interface will be
     obtained from the kernel. When the first form of the command is used,
     in.rarpd must be run separately for each interface on which RARP ser-
     vice is to be supported. A machine that is a router may invoke
     in.rarpd multiple times, for example:

          /usr/sbin/in.rarpd emd1 host
          /usr/sbin/in.rarpd emd2 host-backbone

     In the second synopsis, in.rarpd locates all of the network interfaces
     present on the system and starts a daemon process for each one that
     supports RARP.

FILES
     /etc/ethers
     /etc/hosts

SEE ALSO
     ifconfig(1M), ethers(4), hosts(4), netconfig(4).

     Finlayson, Ross, Timothy Mann, Jeffrey Mogul, and Marvin Theimer, A
     Reverse Address Resolution Protocol, RFC 903, Network Information
     Center, SRI International, Menlo Park, Calif., June 1984.





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