rarpd(1M)        SYSTEM ADMINISTRATION COMMANDS         rarpd(1M)



NAME
     rarpd - DARPA Reverse Address Resolution Protocol server

SYNOPSIS
     rarpd interface [ hostname ]

     /usr/sbin/rarpd -a

DESCRIPTION
     rarpd starts a daemon that responds to Reverse Address Reso-
     lution 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  Protocol  (IP)  address.  The booting machine pro-
     vides its Ethernet Address in a RARP request message.  Using
     the  ethers  and  hosts  databases, rarpd maps this Ethernet
     Address into the corresponding IP address which  it  returns
     to  the booting machine in an RARP reply message.  The boot-
     ing machine must be listed in both databases  for  rarpd  to
     locate  its IP address.  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  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 interface.   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, rarpd must be run separately  for  each
     interface  on  which  RARP  service  is  to be supported.  A
     machine that is a router may invoke  rarpd  multiple  times,
     for example:

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

     In the second synopsis, 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), boot(8).

     Finlayson, Ross, Timothy Mann,  Jeffrey  Mogul,  and  Marvin
     Theimer,  A  Reverse  Address  Resolution Protocol, RFC 903,



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rarpd(1M)        SYSTEM ADMINISTRATION COMMANDS         rarpd(1M)



     Network Information Center, SRI International,  Menlo  Park,
     Calif., June 1984.





















































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