NAME

       ptpd - Precision Time Protocol daemon (1588-2008)

SYNOPSIS

       ptpd  [?]   [-B]  [-c]  [-C]  [-S] [-f FILE] [-R FILE] [-d] [-D] [-P] [-x] [-O NUMBER] [-M
       NUMBER] [-t] [-T ttl] [-a NUMBER,NUMBER] [-w NUMBER] [-b NAME]  [-u  ADDRESS]  [-I  group]
       [-U]  [-e]  [-h]  [-l  NUMBER,NUMBER]  [-o NUMBER] [-i NUMBER] [-n NUMBER] [-y NUMBER] [-m
       NUMBER] [-V NUMBER] [-g] [-v NUMBER] [-r NUMBER] [-N NUMBER] [-s NUMBER] [-p  NUMBER]  [-q
       NUMBER] [-G] [-W] [-Y NUMBER] [-L] [-j]

DESCRIPTION

       Implements  the  Precision  Time Protocol (PTP) Version 2 as defined by the IEEE 1588-2008
       standard. PTP was developed to provide very precise time  coordination  of  LAN  connected
       computers.

       PTPd  is  a  complete  implementation  of  the  IEEE  1588 v2 specification for a standard
       (ordinary) clock. PTPd has been tested with and is known to work properly with other  IEEE
       1588  implementations.  The  source  code  for  PTPd is freely available under a BSD-style
       license. Thanks to contributions from users, PTPd is becoming  an  increasingly  portable,
       interoperable, and stable IEEE 1588 implementation.

       For more information, see http://ptpd.sourceforge.net/

OPTIONS

       -?     display a short help text

       -B     enable debugging if it has been previously compiled in

       -c     run in command line (non-daemon) mode

       -C     run in command line mode and display statistics and logs

       -S     do not log information to syslog

       -f FILE
              send output to FILE

       -R FILE
              record a quality FILE

       -D     display stats in .csv format

       -x     do not reset the clock if off by more than one second

       -M NUMBER
              do not accept delay values of more than NUMBER nanoseconds

       -O NUMBER
              do not reset the clock if offset is more than NUMBER nanoseconds

       -P     display packets received for debugging purposes

       -t     do not adjust the system clock

       -T     set multicast TTL for packets.  Defaults to 1.

       -a NUMBER,NUMBER
              specify clock servo P and I attenuations

       -w NUMBER
              specify one way delay filter stiffness

       -b NAME
              bind PTP to network interface NAME

       -u ADDRESS
              also send uni-cast to ADDRESS

       -I     multicast group for PTP_EXPERIMENTAL mode

       -U     enable hybrid mode which uses both unicast and multicast, requires PTP_EXPERIMENTAL

       -e     run in ethernet mode (currently unimplemented)

       -h     run in End to End mode

       -l NUMBER,NUMBER
              specify inbound, outbound latency in nsec

       -o NUMBER
              specify current UTC offset

       -i NUMBER
              specify PTP domain number

       -n NUMBER
              specify announce interval in 2^NUMBER sec

       -y NUMBER
              specify sync interval in 2^NUMBER sec

       -m NUMBER
              specify max number of foreign master records

       -N NUMBER
              announce receipt timeout

       -V     limit displaying statistics by setting the seconds between log messages

       -g     run as slave only

       -v NUMBER
              specify system clock allen variance

       -r NUMBER
              specify system clock accuracy

       -s NUMBER
              specify system clock class

       -p NUMBER
              specify priority1 attribute

       -q NUMBER
              specify priority2 attribute

       -G     run as master with connection to NTP

       -W     run as master without NTP

       -Y NUMBER
              set an initial delay request value

       -L     enable running multiple ptpd daemons

       -j     turn off IGMP refresh messages

AUTHORS

       Gael Mace <gael_mace@users.sourceforge.net> & Alexandre Van Kempen.

       Steven Kreuzer <skreuzer@freebsd.org>

       George Neville-Neil <gnn@freebsd.org>

       This manual page was written by Gael Mace for any Linux environment project.