System Administration Commands                       ntptrace(1M)



NAME
     ntptrace - trace a chain of NTP hosts back to  their  master
     time source

SYNOPSIS
     /usr/sbin/ntptrace [-n] [-m maxhosts] [server]

DESCRIPTION
     ntptrace 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  argu-
     ments, it starts with  localhost.

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



SunOS 5.11          Last change: 20 Oct 2007                    1






System Administration Commands                       ntptrace(1M)



         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  attri-
     butes:

     ____________________________________________________________
    |       ATTRIBUTE TYPE        |       ATTRIBUTE VALUE       |
    |_____________________________|_____________________________|
    | Availability                | SUNWntpu                    |
    |_____________________________|_____________________________|
    | Interface Stability         | Volatile                    |
    |_____________________________|_____________________________|

SEE ALSO
     ntpq(1M), ntpd(1M), ntpdc(1M), attributes(5))
































SunOS 5.11          Last change: 20 Oct 2007                    2