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IETF RFC 7821
[ACTIVE]

UDP Checksum Complement in the Network Time Protocol (NTP)

Metadata

Publisher
IETF
Doc Type
Experimental
Pages
14
Abstract
The Network Time Protocol (NTP) allows clients to synchronize to a time server using timestamped protocol messages. To facilitate accurate timestamping, some implementations use hardware-based timestamping engines that integrate the accurate transmission time into every outgoing NTP packet during transmission. Since these packets are transported over UDP, the UDP Checksum field is then updated to reflect this modification. This document proposes an extension field that includes a 2-octet Checksum Complement, allowing timestamping engines to reflect the checksum modification in the last 2 octets of the packet rather than in the UDP Checksum field. The behavior defined in this document is interoperable with existing NTP implementations.
Publication Date
2016-03-01
Status Note
Experimental
DOI
10.17487/RFC7821
Link
https://doi.org/10.17487/RFC7821
Author(s)
Tal Mizrahi
Keyword(s)
NTP, UDP, Checksum, Timestamping
Latest version of IETF RFC 7821

Document Versions — IETF RFC 7821

  • ▶ IETF RFC 7821 (2016-03-01)
    THIS DOC [ACTIVE] [LATEST VERSION]

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IETF RFC 7821, UDP Checksum Complement in the Network Time Protocol (NTP). Available at https://doi.org/10.17487/RFC7821
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IETF RFC 7821, UDP Checksum Complement in the Network Time Protocol (NTP). Available at https://doi.org/10.17487/RFC7821

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IETF RFC 7821, UDP Checksum Complement in the Network Time Protocol (NTP). Available at https://doi.org/10.17487/RFC7821
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<span class="citation"><cite>IETF RFC 7821</cite>, UDP Checksum Complement in the Network Time Protocol (NTP). Available at <a href="https://doi.org/10.17487/RFC7821" target="_blank" rel="noopener">https://doi.org/10.17487/RFC7821</a></span>

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IETF RFC 7821, UDP Checksum Complement in the Network Time Protocol (NTP)
doi: 10.17487/RFC7821
url: https://doi.org/10.17487/RFC7821
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<li>
<cite id="bib-rfc7821">IETF RFC 7821</cite>, UDP Checksum Complement in the Network Time Protocol (NTP)
<span class="doi">10.17487/RFC7821</span>
</li>

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