On Thu, Oct 28, 2010 at 11:07 UTC, Parvin, Richard <[email protected]> wrote: > I've noticed that a lot of people use iburst on thier server lines. I'm > wondering why.
http://www.eecis.udel.edu/~mills/ntp/html/confopt.html#server As explained on the "Poll Program" page that links to, iburst reduces the time to initial sync. ntpd requires three exchanges with a source to partially fill the 8-sample clock filter register before it will draw any conclusions. Without iburst, that means a few minutes at the default initial poll interval of 64s. iburst accelerates the process by sending a series of six requests 2 seconds apart when starting up, and also after a server has become unreachable. The first packet must elicit a response or the rest are not sent. The visible result when using iburst on all your server lines is it takes a few seconds instead of a few minutes for ntpd to take the wheel (and possibly step the clock, if out more than 128ms by default). Cheers, Dave Hart _______________________________________________ questions mailing list [email protected] http://lists.ntp.org/listinfo/questions
