06-10-2008
Can you force local NTP server to be accepted as "suitable"?
Is there some way to force the NTP server on a brand-new install to be "suitable" to sync other servers from? (I'm more concerned with synchronization between machines, and less concerned with what the actual time they sync to is)
For example, whenever I install fresh from the Fedora DVDs and try to time-sync between servers (ntpdate -u [IP_of_my_new_system]), I get an error like:
Quote:
no suitable servers found
These machines are not attached to the internet, and I don't want to wait every time (dunno how long is required, but I usually wait an hour or so) for the NTP server to accept itself as valid.
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LEARN ABOUT CENTOS
ntptrace
ntptrace(8) System Manager's Manual ntptrace(8)
NAME
ntptrace - trace a chain of NTP servers back to the primary source
SYNOPSIS
ntptrace [ -n ] [ -m maxhosts ] [ server ]
DESCRIPTION
ntptrace is a perl script that uses the ntpq utility program to follow the chain of NTP servers from a given host back to the primary time
source. For ntptrace to work properly, each of these servers must implement the NTP Control and Monitoring Protocol specified in RFC 1305
and enable NTP Mode 6 packets.
If given no arguments, ntptrace starts with localhost. Here is an example of the output from ntptrace:
% ntptrace
localhost: stratum 4, offset 0.0019529, synch distance 0.144135
server2ozo.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 host name, the host stratum, the time offset between that host and the local host (as
measured by ntptrace; this is why it is not always zero for "localhost"), the host synchronization distance, and (only for stratum-1
servers) the reference clock ID. All times are given in seconds. Note that the stratum is the server hop count to the primary source, while
the synchronization distance is the estimated error relative to the primary source. These terms are precisely defined in RFC-1305.
OPTIONS
-n Turns off the printing of host names; instead, host IP addresses are given. This may be useful if a nameserver is down.
BUGS
This program makes no attempt to improve accuracy by doing multiple samples.
SEE ALSO
ntpd(8)
The official HTML documentation.
This file was automatically generated from HTML source.
ntptrace(8)