.\" -*- nroff -*"
.TH ptpd 8 "August 9, 2010" "version 1.1.0" "Precision Time Protocol daemon"
.SH NAME
ptpd \- Precision Time Protocol daemon
.SH SYNOPSIS
.B ptpd

[-?]
[-c]
[-S]
[-f FILE]
[-R FILE]
[-d]
[-D]
[-x]
[-M NUMBER]
[-t]
[-T ttl]
[-a NUMBER,NUMBER]
[-w NUMBER]
[-b NAME]
[-u ADDRESS]
[-l NUMBER,NUMBER]
[-o NUMBER]
[-e NUMBER]
[-y NUMBER]
[-m NUMBER]
[-g]
[-p]
[-s NUMBER]
[-i NAME]
[-v NUMBER]
[-n NAME]
[-k NUMBER,NUMBER]

.SH DESCRIPTION
Implements version 1 of the Precision Time Protocol (PTP) as defined
by the IEEE 1588 standard. PTP was developed to provide very precise
time coordination of LAN connected computers.
.PP
PTPd is a complete implementation of the IEEE 1588 specification for a
standard (non-boundary) 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.
.PP
For more information, see http://ptpd.sourceforge.net/
.SH OPTIONS
.TP
.B \-?
display a short help text
.TP
.B \-c
run in command line (non-daemon) mode
.TP
.B \-S
log information to syslog
.TP
.B \-f FILE
send output to FILE
.TP
.B \-R FILE
record quality data to FILE
.TP
.B \-d
display stats
.TP
.B \-D
display stats in .csv format
.TP
.B \-x
do not reset the clock if off by more than one second
.TP
.B \-M NUMBER
do not reset the clock if off by more than NUMBER nanoseconds
.TP
.B \-t
do not adjust the system clock
.TP
.B \-T
set multicast TTL for packets.  Defaults to 1.
.TP
.B \-a NUMBER,NUMBER
specify clock servo P and I attenuations
.TP
.B \-w NUMBER
specify one way delay filter stiffness
.TP
.B \-b NAME
bind PTP to network interface NAME
.TP
.B \-u ADDRESS
don't multicast, send messages unicast to ADDRESS
.TP
.B \-l NUMBER,NUMBER
specify inbound, outbound latency in nsec
.TP
.B \-o NUMBER
specify current UTC offset
.TP
.B \-e NUMBER
specify epoch NUMBER
.TP
.B \-y NUMBER
specify sync interval in 2^NUMBER sec
.TP
.B \-m NUMBER
specify max number of foreign master records
.TP
.B \-g
run as slave only
.TP
.B \-p
make this a preferred clock
.TP
.B \-s NUMBER
specify system clock stratum
.TP
.B \-i NAME
specify system clock identifier
.TP
.B \-v NUMBER
specify system clock allen variance
.TP
.B \-n NAME
specify PTP subdomain name (not related to IP or DNS)
.TP
.B \-k NUMBER,NUMBER
send a management message of key, record, then exit

.SH AUTHORS
.PP
Originally written and maintained by Kendall Correll
<kendall_c@users.sourceforge.net>
.PP
Steven Kreuzer <skreuzer@freebsd.org> 
.PP
George Neville-Neil <gnn@freebsd.org>
.PP
This manual page was originally written by Andrew Straw
<strawman@astraw.com> for the Debian Project (but may be used by
others).