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" <neil@tonal.clara.co.uk> wrote:
On 21/11/12 12:34, Ryan Malayter wrote:
On Nov 19, 2012, at 6:12 PM, "Scott Weeks" <surfer@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