NTPD seems to be not syncing !!! Post: 94738

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Operating Systems Linux NTPD seems to be not syncing !!! Post 94738 by Perderabo on Tuesday 3rd of January 2006 01:35:06 PM

01-03-2006

Administrator Emeritus

This configuration looks like it is intended as the ntp server for your organization. It obtains the time from external sources. And it is will to distribute the time to other boxes. So there might be other boxes that use this box as their ntp server. Or maybe this box is the only system in your organization.

server 127.127.1.0 # local clock
fudge 127.127.1.0 stratum 10

This is a NOT great idea in your situation. You have specified, that in the special case where no other servers can be contacted, to use the local clock as if it were a server. Well, you have also stated that your local clock is off by 15 minutes. Any other boxes that get ntp through this box will try to sync to this box's local clock. If you remove those lines, if this box can't contact a server, you have no ntp service. Everyone just uses their local clocks. If this box does not serve others, there is no harm, but I still would not do it. This should be done only on systems with great internals clocks.

driftfile /etc/ntp/drift
You are using a driftfile. That is good.

server 132.249.20.60 # billthecat.sdsc.edu
server 204.152.184.72 # clock.isc.org
I did not find the first site on the lists. The second site is a stratum 1. I would just use the second entry. If you use multiple servers, you need at least 3. Two servers does not work very well.

Read the NTP FAQ, especially the part about NTP in real life.

Perderabo

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LEARN ABOUT OSF1

ntptrace

ntptrace(8)						      System Manager's Manual						       ntptrace(8)

NAME

       ntptrace - Traces a chain of NTP hosts back to their master time source

SYNOPSIS

       /usr/sbin/ntptrace [-dnv] [-r retries] [-t timeout] [server]

OPTIONS

       Turns  on  some	debugging output.  Turns off the printing of host names; instead, host IP addresses are given.	This may be necessary if a
       nameserver is down.  Sets the number of retransmission attempts for each host; default = 5.  Sets the retransmission timeout (in  seconds);
       default = 2.  Prints verbose information about the NTP servers.

DESCRIPTION

       The  ntptrace  command 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.

       The following is an example of the output from ntptrace: % 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 host name, the host's 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's synchronization distance, and (only for stratum-1
       servers) the reference clock ID.  All times are given in seconds. (Synchronization distance is a measure of the	goodness  of  the  clock's
       time.)

SEE ALSO

       Commands: xntpd(8), xntpdc(8)

																       ntptrace(8)