Guys: We were synchronized against multiple sources. Unfortunately the Navy NTP source contaminated multiple downstream sources.
Unless you can trace all your sources, if these sources all have a root source you will break. Sid Rao | CTI Group | +1 (317) 262-4677 On Nov 21, 2012, at 8:01 AM, "Neil Harris" <n...@tonal.clara.co.uk> wrote: > On 21/11/12 12:34, Ryan Malayter wrote: >> >> On Nov 19, 2012, at 6:12 PM, "Scott Weeks" <sur...@mauigateway.com> wrote: >> >>> Lesson learned: Use more than one NTP source. >> The lesson is: use MORE THAN TWO diverse NTP sources. >> >> A man with two watches has no idea what the time it actually is. > > Per David Mills, from the discussion linked upthread, this should be FOUR OR > MORE... > > "Every critical server should have at least four sources, no two from the > same organization and, as much as possible, reachable only via diverse, > nonintersecting paths." > > Four, so that the remaining three can reach consensus even if one fails. > > -- Neil > > >
