timed(1M)                                                  timed(1M)


       NAME
             timed - time server daemon

       SYNOPSIS
             in.timed [-t] [-M] [-n network] [-i network]

       DESCRIPTION
             The time server daemon timed is normally invoked at boot time
             from the STREAMS TCP/IP startup script.  timed synchronizes
             the host's time with the time of other machines in a local
             area network running timed.  These time servers will slow down
             the clocks of some machines and speed up the clocks of others
             to bring them to the average network time.  The average
             network time is computed from measurements of clock
             differences using the ICMP timestamp request message.

             The service provided by timed is based on a master-slave
             scheme.  When timed is started on a machine, it asks the
             master for the network time and sets the host's clock to that
             time.  After that, it accepts synchronization messages
             periodically sent by the master, and calls adjtime(2) to
             perform the needed corrections on the host's clock.

             timed also communicates with netdate(1M) in order to set the
             date globally, and with timedc(1M), the timed control program.

          Files
             /var/adm/timed.log                 tracing file for timed
             /var/adm/timed.masterlog           log file for master timed
             /etc/inet/if.ignore                network interfaces to be ignored

       USAGE
             If the machine running the master crashes, then the slaves
             will elect a new master from among slaves running with the -M
             flag.  A timed running without the -M flag will remain a
             slave.

             The -t  flag enables timed to trace the messages it receives
             in the file /var/adm/timed.log.  Tracing can be turned on or
             off by the program timedc.

             Normally, timed checks for a master time server on each
             network to which it is connected, except as modified by the
             options described below.  It will request synchronization
             service from the first master server located.  If permitted by
             the -M flag, it will provide synchronization service on any


                           Copyright 1994 Novell, Inc.               Page 1

      timed(1M)                                                  timed(1M)


            attached networks on which no current master server was
            detected.  Such a server propagates the time computed by the
            top-level master.  The -n  flag, followed by the name of a
            network to which the host is connected [see networks(4)],
            overrides the default choice of the network addresses made by
            the program.  Each time the -n flag appears, that network name
            is added to a list of valid networks.  All other networks are
            ignored.

            The -i flag, followed by the name of a network to which the
            host is connected [see networks(4)], overrides the default
            choice of the network addresses made by the program.  Each
            time the -i flag appears, that network name is added to a list
            of networks to ignore.  All other networks are used by the
            time daemon.

         Warnings
            The -n and -i flags are meaningless if used together.

      REFERENCES
            adjtime(2), date(1), gettimeofday(2), gettimeofday(3BSD),
            ICMP(7), if.ignore(4), netdate(1M), networks(4), timedc(1M)


























                          Copyright 1994 Novell, Inc.               Page 2