bprelay - BOOTP relay agent
/usr/sbin/bprelay [-f] [-d n] [-h hopcount] [-i interface,interface...] [-t
minutes] [-w seconds] server...
-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).
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.
Sets debug level to the numeric value n. Larger values of n provides
more debugging information.
Instructs bprelay to not forward packets if the value of the hops field
in the BOOTP packet exceeds hopcount.
Instructs bprelay to terminate if minutes have passed without any pack-
ets being received. This option is only honored if bprelay was started
Instructs bprelay to not forward packets until the secs field in the
BOOTP packet header exceeds this value.
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
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
Non-standard subnet masks for all networks administered by bprelay, must be
available either through /etc/netmasks or NIS.
Commands: inetd(8), joinc(8)
System calls: syslog(3)
RFC1497, RFC1542, RFC1534