1ntptrace(8)                 System Manager's Manual                ntptrace(8)
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NAME

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

10       ntptrace [ -n ] [ -m maxhosts ] [ server ]
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DESCRIPTION

14       ntptrace  is a perl script that uses the ntpq utility program to follow
15       the chain of NTP servers from a given host back  to  the  primary  time
16       source.  For  ntptrace  to  work  properly,  each of these servers must
17       implement the NTP Control and Monitoring Protocol specified in RFC 1305
18       and enable NTP Mode 6 packets.
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20       If given no arguments, ntptrace starts with localhost. Here is an exam‐
21       ple of the output from ntptrace:
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23       % ntptrace
24       localhost: stratum 4, offset 0.0019529, synch distance 0.144135
25       server2ozo.com: stratum 2, offset 0.0124263, synch distance 0.115784
26       usndh.edu: stratum 1, offset 0.0019298, synch distance 0.011993, refid 'WWVB'
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28       On each line, the fields are (left to right): the host name,  the  host
29       stratum,  the time offset between that host and the local host (as mea‐
30       sured by ntptrace; this is why it is not always zero for  "localhost"),
31       the host synchronization distance, and (only for stratum-1 servers) the
32       reference clock ID. All times are given in seconds. Note that the stra‐
33       tum  is  the server hop count to the primary source, while the synchro‐
34       nization distance is  the  estimated  error  relative  to  the  primary
35       source. These terms are precisely defined in RFC-1305.
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OPTIONS

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

45       This  program  makes  no  attempt to improve accuracy by doing multiple
46       samples.
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SEE ALSO

50       ntpd(8)
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52       HTML documentation in ntp-doc package.
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54       This file was automatically generated from HTML source.
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