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NetBSD 6.1.5 - man page for ntptrace (netbsd section 8)

NTPTRACE(8)			   BSD System Manager's Manual			      NTPTRACE(8)

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

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

     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 (left to right): the host name, the host stratum, the time off-
     set 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 esti-
     mated error relative to the primary source. These terms are precisely defined in RFC-1305.

     -d      Turns on some debugging output.

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

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

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

     -v      Prints verbose information about the NTP servers.

     David L. Mills (mills@udel.edu)

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

BSD					  March 29, 2000				      BSD

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