Can you force local NTP server to be accepted as "suitable"?


 
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Old 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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ntptrace(1M)						  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 '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 local- host) 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. SunOS 5.11 19 Mar 1998 ntptrace(1M)