[ntp:questions] Using SNTP request always with T1 as zero

Harlan Stenn stenn at ntp.isc.org
Mon Apr 16 22:46:37 UTC 2007

>>> In article <1176719807.676167.124350 at q75g2000hsh.googlegroups.com>, "Mastuac" <jordi_pn at yahoo.es> writes:

Mastuac> Hello, I'm implementing sntp on a small micro.  Is there any
Mastuac> problem if I send the sntp request message with the Originate
Mastuac> Timestamp (T1) always as zero?  So the offset would be t= (T2 - 0)
Mastuac> + (T3 - T4 ).  The only utility of T1 is to allow the client to
Mastuac> distinguish from delayed server responses?

Do the math.  Look at all 4 terms.

I think you will figure it out pretty quickly.

If all else fails, give it a try and see how well it works.


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