ntptrace - trace a chain of NTP servers back to the primary source
ntptrace [ -n ] [ 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 argu-
ments, it starts with localhost. Here is an example of the output from 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 stra-
tum-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 synchronization distance is
the estimated error relative to the primary source. These terms are precisely defined in
-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.
Sets the number of retransmission attempts for each host (default = 5).
Sets the retransmission timeout (in seconds) (default = 2).
-v Prints verbose information about the NTP servers.
This program makes no attempt to improve accuracy by doing multiple samples.
Network Time Protocol October 7, 2006 NTPTRACE(1)