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RFC 4330, "Simple Network Time Protocol (SNTP) Version 4 for IPv4, IPv6 and OSI", January 2006

Note: This RFC has been obsoleted by RFC 5905

Source of RFC: INDEPENDENT

Errata ID: 6436
Status: Rejected
Type: Technical
Publication Format(s) : TEXT
Reported By: Ellen Marie Dash
Date Reported: 2021-02-22
Rejected by: Adrian Farrel
Date Rejected: 2021-02-24

Section 5 says: 

   The roundtrip delay d and system clock offset t are defined as:

      d = (T4 - T1) - (T3 - T2)     t = ((T2 - T1) + (T3 - T4)) / 2.

It should say:

   The roundtrip delay d and system clock offset t are defined as:

      d = (T4 - T1) - (T3 - T2)     t = ((T2 - T1) + (T4 - T3)) / 2.

Notes:

In the equation for "t", the values T3 and T4 are swapped. This can cause the value to be off by over 120 years.
--VERIFIER NOTES--
Note that:
- RFC 4330 has been obsoleted by RFC 5905 so raising errata reports against it is no longer
valuable
- RFC 5905 contains the same text as reported here
- There is already an errata report (https://www.rfc-editor.org/errata_search.php?eid=5020)
against RFC 5905 reporting this problem.

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