NTP Interleaved Modes
RFC 9769, “NTP Interleaved Modes”, is a Proposed Standard document published in May 2025 by M. Lichvar, A. Malhotra. It updates RFC 5905. The canonical text is published by the RFC Editor.
Abstract
This document specifies interleaved modes for the Network Time Protocol (NTP). These new modes improve the accuracy of time synchronization by enabling the use of more accurate transmit timestamps that are available only after the transmission of NTP messages. These enhancements are intended to improve timekeeping in environments where high accuracy is critical. This document updates RFC 5905 by defining these new operational modes.
What “Proposed Standard” means
An entry-level standards-track specification: stable, peer-reviewed and a solid basis for implementation, though it may still evolve before becoming an Internet Standard.
The canonical text of RFC 9769 is hosted at rfc-editor.org. Available in HTML,TXT,PDF,XML.
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