NTPTRACE(1)							   NTPTRACE(1)



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

SYNOPSIS
       ntptrace [ -vdn ] [ -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 (left to right): the host name,  the  host
       stratum,  the time offset between that host and the local host (as mea
       sured 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 stra
       tum  is	the server hop count to the primary source, while the synchro
       nization distance is  the  estimated  error  relative  to  the  primary
       source. These terms are precisely defined in RFC-1305.

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



Network Time Protocol		October 7, 2006 		   NTPTRACE(1)