rarpd(ADMN)                     19 June 1992                     rarpd(ADMN)


 Name

    rarpd - DARPA Reverse Address Resolution Protocol daemon


 Syntax

    /etc/rarpd [ -a ] [ -d ] [if [hostname]]


 Description

    rarpd starts a daemon that responds to Reverse Address Resolution Proto-
    col (RARP) requests. The  daemon forks a copy of itself, and requires
    root privileges.

    Machines use RARP at boot time to discover their (32 bit) IP address
    given their (48 bit) Ethernet address. The booting machine sends its Eth-
    ernet address in a RARP request message. For the request to be answered,
    a machine's name-to-IP-address entry must exist in the /etc/hosts file or
    must be available from the domain name server and its name-to-Ethernet-
    address entry must exist in the /etc/ethers file. Using the above two
    sources, rarpd maps this Ethernet address into the corresponding IP
    address.  Furthermore, the server that runs this daemon must have entries
    in both files.


 Options


    -a        invoke the daemon on all the configured interfaces, excluding
              interfaces marked down; interfaces on which arp has been dis-
              abled; the loopback interface; point to point interfaces; and
              interfaces not supporting broadcast packets.


    -d        print debug information to stdout.


    if        is the interface parameter string of the form ``name unit'',
              for example ``wde0''.


    hostname  is the interface's corresponding hostname.


    The if, hostname pair should be the same as the arguments passed to the
    ifconfig(ADMN) command.


 Files

    /etc/ethers
    /etc/hosts


 See also

    ethers(SFF), hosts(SFF), ifconfig(ADMN)