11-02-2008
NTP treshold "synchronisation lost"
does anyone know how to change the treshold of 128ms in NTP.
in order to ignore these alarms:
Oct 27 14:44:15 rt1 ntpd[19830]: synchronisation lost
Oct 27 15:08:25 rt1 ntpd[19830]: time reset 0.688591 s
Oct 27 15:08:25 rt1 ntpd[19830]: synchronisation lost
Oct 27 15:28:45 rt1 ntpd[19830]: time reset 0.462257 s
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NTPD(8) System Manager's Manual NTPD(8)
NAME
ntpd - "Network Time Protocol daemon"
SYNOPSIS
ntpd [-dnSsv] [-f file]
DESCRIPTION
The ntpd daemon synchronizes the local clock to one or more remote NTP servers or local timedelta sensors. ntpd can also act as an NTP
server itself, redistributing the local time. It implements the Simple Network Time Protocol version 4, as described in RFC 2030, and the
Network Time Protocol version 3, as described in RFC 1305.
ntpd uses the adjtime(2) system call to correct the local system time without causing time jumps. Adjustments larger than 128ms are logged
using syslog(3) with LOG_INFO priority. The threshold value is chosen to avoid having local clock drift thrash the log files. Should ntpd
be started with the -d option, all calls to adjtime(2) will be logged.
When ntpd starts up, it reads settings from a configuration file, typically ntpd.conf(5).
The options are as follows:
-d Do not daemonize. If this option is specified, ntpd will run in the foreground and log to stderr.
-f file
Use file as the configuration file, instead of the default /etc/openntpd/ntpd.conf.
-n Configtest mode. Only check the configuration file for validity.
-S Do not set the time immediately at startup. This is the default.
-s Set the time immediately at startup if the local clock is off by more than 180 seconds. Allows for a large time correction, elimi-
nating the need to run rdate(8) before starting .
-v This option allows ntpd to send DEBUG priority messages to syslog.
When ntpd receives a SIGINFO signal, it will write its peer and sensor status to syslog.
FILES
/etc/openntpd/ntpd.conf
default ntpd configuration file
/var/lib/openntpd/ntpd.drift
drift file, written by ntpd periodically and used at startup to get the initial clock drift
SEE ALSO
date(1), adjfreq(2), adjtime(2), ntpd.conf(5), rdate(8), timed(8)
, Network Time Protocol (Version 3), March 1992.
, Simple Network Time Protocol (SNTP) Version 4, October 1996.
HISTORY
The ntpd program first appeared in OpenBSD 3.6 .
$Mdocdate: November 10 2007 $ NTPD(8)