[ntp:questions] Offsets in NTP vs. SNTP
Dennis Hilberg Jr
dont at spam.me
Sun Jul 29 19:09:47 UTC 2007
Brian Garrett wrote:
> I have never seen this question answered anywhere, so I hope someone here
> can either answer, or point me in the right direction in TFM that I didn't R
> :)
>
> When I use an SNTP client on my Windows XP box, after one or two settings
> the client displays an offset of a few milliseconds (usually <5). However,
> if I then immediately check the offset with NTP (using either the NIST app
> available on their website or Meinberg's NTP monitor), I get an offset in
> the 20-30ms range. Why would the two offsets be different? The delay
> hasn't changed. I know the two protocols function differently but they
> should still be reading the same time, no?
>
> TIA,
> Brian Garrett
>
>
You might try reading this:
http://www.meinberg.de/english/faq/faq_37.htm
You also might read RFC 2030, which defines SNTP:
http://www.faqs.org/rfcs/rfc2030.html
--
Dennis Hilberg Jr <timekeeper(at)dennishilberg(dot)com>
NTP Server Information: http://saturn.dennishilberg.com/ntp.html
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