I'm still having this issue. Here is another update. I noticed that the drift file for the system with the problem contained "0.000". On most other systems this contains a positive number (and on two a negative number). I deleted the drift file, resynch'ed the time with "ntpdate <hostname>", restarted the NTP daemon, and waited for the drift file to be recreated. It again contained "0.000" and the output of "ntpq -np looked like this:

remote refid st t when poll reach delay offset jitter ======================================================================== ====== 10.101.32.104 67.128.71.65 3 u 49 64 377 0.611 1871.40 987.132 *127.127.1.0 .LOCL. 10 l 48 64 377 0.000 0.000 0.001

I replaced the drift file with the contents of the file before the upgrade to CentOS, resynch'ed the time, and restarted the NTP daemon. But after a little while, the system is "bound" to itself again.

BTW, the output of the cron job running ntpdate once an hour showed that the system has a very steady drift of 14.9 seconds every hour. Does that seem excessive? NTP should be able to handle this, right?

Alfred

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