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bprelay(8)


NAME

  bprelay - BOOTP relay agent


SYNOPSIS

  /usr/sbin/bprelay [-f] [-d n] [-h hopcount] [-i interface,interface...] [-t
  minutes] [-w seconds] server...


OPTIONS

  -f  Foreground mode.	In this mode, bprelay does not run as a daemon.	 All
      messages are written to stdout and stderr, although warnings and errors
      are still sent to syslog(3).

  -i interface...
      Without this option, bprelay listens on all interfaces on which the
      underlying protocol supports broadcasting.  With this option, bprelay
      listens only to those interfaces specified.  Any non-existent or
      invalid interface name are ignored.

  -d n
      Sets debug level to the numeric value n.	Larger values of n provides
      more debugging information.

  -h hopcount
      Instructs bprelay to not forward packets if the value of the hops field
      in the BOOTP packet exceeds hopcount.

  -t minutes
      Instructs bprelay to terminate if minutes have passed without any
      packets being received.  This option is only honored if bprelay was
      started from inetd(8).

  -w seconds
      Instructs bprelay to not forward packets until the secs field in the
      BOOTP packet header exceeds this value.


DESCRIPTION

  The bprelay daemon forwards DHCP or BOOTP packets to the specified list of
  servers (server).  Servers may be identified either by their IP addresses
  or by their names.  The bprelay agent normally runs as a daemon process,
  and may be started either from the shell command line interface or by
  inetd(8).

  The purpose of bprelay is to provide the same service as that found in
  router hardware, but to run on UNIX workstations.  The bprelay agent
  listens for DHCP/BOOTP packets on each of the interfaces specified in the
  command line, and relays each packet to the servers specified.  As a rule,
  bprelay forwards each and every packet to every server specified, but it
  omits servers whose IP address is found to be on the same IP network as the
  receiving interface since those servers will presumably hear the original
  broadcast.


RESTRICTIONS

  Non-standard subnet masks for all networks administered by bprelay, must be
  available either through /etc/netmasks or NIS.


SEE ALSO

  Commands: inetd(8), joinc(8)

  System calls: syslog(3)

  RFC1497, RFC1542, RFC1534

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