NTPTRACE(8) FreeBSD System Manager's Manual (user) NTPTRACE(8)
NAME
ntptrace - Trace peers of an NTP server
SYNOPSIS
ntptrace [-flags] [-flag [value]] [--option-name[[=| ]value]] [host]
DESCRIPTION
ntptrace is a perl script that uses the ntpq utility program to follow
the chain of NTP servers from a given host back to the primary time
source. For ntptrace to work properly, each of these servers must
implement the NTP Control and Monitoring Protocol specified in RFC 1305
and enable NTP Mode 6 packets.
If given no arguments, ntptrace starts with localhost. Here is an example
of the output from ntptrace:
% ntptrace localhost: stratum 4, offset 0.0019529, synch distance 0.144135
server2ozo.com: stratum 2, offset 0.0124263, synch distance 0.115784 usndh.edu:
stratum 1, offset 0.0019298, synch distance 0.011993, refid 'WWVB'
On each line, the fields are (left to right): the host name, the host
stratum, the time offset between that host and the local host (as
measured by ntptrace; this is why it is not always zero for "localhost"),
the host synchronization distance, and (only for stratum-1 servers) the
reference clock ID. All times are given in seconds. Note that the stratum
is the server hop count to the primary source, while the synchronization
distance is the estimated error relative to the primary source. These
terms are precisely defined in RFC-1305.
OPTIONS
-n, --numeric
Print IP addresses instead of hostnames.
Output hosts as dotted-quad numeric format rather than converting
to the canonical host names.
-m number, --max-hosts=number
Maximum number of peers to trace. This option takes an integer
number as its argument. The default number for this option is:
99
This option has not been fully documented.
-r string, --host=string
Single remote host. The default string for this option is:
127.0.0.1
This option has not been fully documented.
-?, --help
Display usage information and exit.
-!, --more-help
Pass the extended usage information through a pager.
-v [{v|c|n --version [{v|c|n}]}]
Output version of program and exit. The default mode is `v', a
simple version. The `c' mode will print copyright information
and `n' will print the full copyright notice.
EXIT STATUS
One of the following exit values will be returned:
0 (EXIT_SUCCESS)
Successful program execution.
1 (EXIT_FAILURE)
The operation failed or the command syntax was not valid.
70 (EX_SOFTWARE)
libopts had an internal operational error. Please report it to
[email protected]. Thank you.
NOTES
This manual page was AutoGen-erated from the ntptrace option definitions.
FreeBSD 14.1-RELEASE-p8 March 3 2020 FreeBSD 14.1-RELEASE-p8