System Administration Commands                       ntptrace(1M)

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

SYNOPSIS
     /usr/sbin/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.

OPTIONS
     The following options are supported:

     -d              Turns on some debugging output.



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



     -r retries      Sets the number of  retransmission  attempts
                     for each host.



     -t timeout      Sets   the   retransmission   timeout    (in
                     seconds); default = 2.



     -v              Prints verbose information  about  the   NTP
                     servers.



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.

ATTRIBUTES
     See attributes(5) for descriptions of the  following  attri-
     butes:

     ____________________________________________________________
    |       ATTRIBUTE TYPE        |       ATTRIBUTE VALUE       |
    |_____________________________|_____________________________|
    | Availability                | SUNWntpu                    |
    |_____________________________|_____________________________|


SEE ALSO
     xntpd(1M), attributes(5)

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