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.