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 'WVB'



SunOS 5.11          Last change: 19 Mar 1998                    1






System Administration Commands                       ntptrace(1M)



     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.


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



     
           ATRIBUTE TYPE               ATRIBUTE VALUE       
    
     Availability                 SUNWntpu                    
    


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

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
















SunOS 5.11          Last change: 19 Mar 1998                    2