Sun Microsystems, Inc.
spacerspacer
spacer   www.sun.com docs.sun.com | | |  
spacer
black dot
   
A   B   C   D   E   F   G   H   I   J   K   L   M   N   O   P   Q   R   S   T   U   V   W   X   Y   Z
    
 
System Administration Commandsntptrace(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):

  • The server's host name
  • The server's stratum
  • The time offset between that server and the local host (as measured by ntptrace; this is why it is not always zero for localhost)
  • The host's synchronization distance
  • 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 attributes:

ATTRIBUTE TYPEATTRIBUTE VALUE
AvailabilitySUNWntpu

SEE ALSO

 

xntpd(1M), attributes(5)

BUGS

 

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


SunOS 5.9Go To TopLast Changed 19 Mar 1998

 
      
      
Copyright 2002 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms.