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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 attributes:

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.

Index

NAME

SYNOPSIS

DESCRIPTION

OPTIONS

EXAMPLES

ATTRIBUTES

SEE ALSO

BUGS

Партнёры:

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