I'm seeing some funny behavior with NTP. My setup: I have an IRIG card feeding time source to a Symmetricon XLi time & frequency system box. The XLi is intended to be the NTP server for the rest of my servers.
The IRIG card is in one of the servers running Linux. As a test I had this server use the XLi as the NTP server, and they in a small program on the Linux box I compared the system time to the time on the IRIG card, to see how close the NTP can get to the IRIG reference. What I saw was very good performance of generally less than 1 ms match, however, at approximately 6 hour intervals, there was a 3 ms jump lasting about 10 minutes. I have a plot at http://home.twcny.rr.com/rkellog1/ntp5.jpg Does anyone have an explanation for this behavior? In this setup, the XLi is directly connected to the Linux server, and no one else is logged onto this isolated server. Thanks in advance. Rick _______________________________________________ questions mailing list [email protected] https://lists.ntp.isc.org/mailman/listinfo/questions
