RE: Leap second tonight

From: Deepak Jain (no email)
Date: Tue Mar 17 2009 - 15:54:28 EDT

  • Next message: NANOG Mail List Committee: "ADMIN: List FAQ/Monthly Post."

    >
    > As long as the end-user is made aware that the accuracy of said NTP
    > clock
    > is +/- 30.000 seconds (or whatever jitter might exist). Seems kind
    > of
    > ridiculous to use an NTP source that is, for many purposes, wildly
    > inaccurate. For my purposes, wildly is more than +/- 0.1 seconds.
    > Trying
    > to troubleshoot a problem, network or server, where the timestamps on
    > each
    > server/router/device vary inconsistently, is like walking on broken
    > fluorescent bulbs -- painful and dangerous to one's health.
    >

    Not being a time geek, since Cisco's were called out for being wild
    jitter-mongers... how much jitter are we talking about?

    Clock is synchronized, stratum 2, xxxxxxxxxxxxxxxxxxxxxxxx
    nominal freq is 250.0000 Hz, actual freq is 249.9989 Hz, precision is 2**18
    reference time is CD6A7CD4.45A9BB00 (19:47:32.272 UTC Tue Mar 17 2009)
    clock offset is 2.0581 msec, root delay is 29.62 msec
    root dispersion is 6.81 msec, peer dispersion is 3.30 msec

    Are we talking about +/- 30 seconds, or a problem bounded by +/- 30 msec?

    Deepak Jain
    AiNET


  • Next message: NANOG Mail List Committee: "ADMIN: List FAQ/Monthly Post."





    Hosted Email Solutions

    Invaluement Anti-Spam DNSBLs



    Powered By FreeBSD   Powered By FreeBSD