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ntptrace(ADMN)


ntptrace -- trace a chain of NTP servers back to the primary source

Syntax

ntptrace [-vdn] [-o version] [-r retries] [-t timeout] [server]

Description

ntptrace determines where a given Network Time Protocol (NTP) server gets its time from, and follows the chain of NTP servers back to their master time source. If given no arguments, it 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 from left to right: 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


-d
Turn on some debugging output.

-n
Turn off the printing of host names; instead, host IP addresses are given. This may be useful if a name server is down.

-o version
Specify the NTP vesion for outgoing query packets as the integer version, which can be 1, 2, or 3. The default is 1 to allow ntptrace to communicate with older implementations of NTP.

-r retries
Set the number of retransmission attempts for each host (default = 5).

-t timeout
Set the retransmission timeout in seconds (default = 2).

-v
Print verbose information about the NTP servers.

Limitations

This program makes no attempt to improve accuracy by doing multiple samples.

See also

ntpd(ADMN), ntpdc(ADMN)

RFC 1305


© 2003 Caldera International, Inc. All rights reserved.
SCO OpenServer Release 5.0.7 -- 11 February 2003