RFC Errata
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: INDEPENDENTSee Also: RFC 4330 w/ inline errata
Errata ID: 2263
Status: Verified
Type: Technical
Publication Format(s) : TEXT
Reported By: Scott Barnes
Date Reported: 2010-05-15
Verifier Name: Nevil Brownlee
Date Verified: 2013-05-23
Section 5 says:
4. The server reply should be discarded if any of the LI, Stratum, or Transmit Timestamp fields is 0 or the Mode field is not 4 (unicast) or 5 (broadcast).
It should say:
4. The server reply should be discarded if any of the VN, Stratum, or Transmit Timestamp fields is 0 or the Mode field is not 4 (unicast) or 5 (broadcast).
Notes:
Zero is a legal value for the LI field under normal conditions. Zero is not legal for VN field, however.