ntptrace(1M) System Administration Commands ntptrace(1M)NAMEntptrace - trace a chain of NTP hosts back to their master time source
SYNOPSIS
/usr/sbin/ntptrace [-n] [-m maxhosts] [server]
DESCRIPTIONntptrace determines from where a given Network Time Protocol (NTP)
server gets its time, and follows the chain of NTP servers back to
their master time source. If given no arguments, it starts with local‐
host.
OPTIONS
The following options are supported:
-n Turns off the printing of host names; instead, host IP
addresses are given.
-m maxhosts Sets the maximum number of levels up the chain that will
be followed.
EXAMPLES
Example 1 Sample Output From the ntptrace Command
The following example shows the output from the ntptrace command:
% ntptrace
localhost: stratum 4, offset 0.0019529, synch distance 0.144135
server2.bozo.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):
o The server's host name
o The server's stratum
o The time offset between that server and the local host (as
measured by ntptrace; this is why it is not always zero for
localhost)
o The host's synchronization distance
o The reference clock ID (only for stratum-1 servers)
All times are given in seconds. Synchronization distance is a measure
of the goodness of the clock's time.
NOTES
Source for ntptrace is available on http://src.opensolaris.org.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
┌─────────────────────────────┬─────────────────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├─────────────────────────────┼─────────────────────────────┤
│Availability │service/network/ntp │
├─────────────────────────────┼─────────────────────────────┤
│Interface Stability │Volatile │
└─────────────────────────────┴─────────────────────────────┘
SEE ALSOntpq(1M), ntpd(1M), ntpdc(1M), attributes(5))
ntptrace(1M)
