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IEEE Standard for Ethernet
Amendment Standard - Active.
This amendment to IEEE Std 802.3-2022 modifies Clause 30, Clause 45, and Clause 90, and adds Annex 90A to enhance support for time synchronization protocols by providing options for sub-nanosecond reporting of the transmit and receive path data delays, selection of the data delay measurement point, and dynamic reporting of path data delay variation.
(The PDF of this standard is available at no charge compliments of the IEEE GET program at https://ieeexplore.ieee.org/browse/standards/get-program/page/series?id=68.)
Define optional enhancements to Ethernet support for time synchronization protocols to provide improved timestamp accuracy.
These enhancements are intended to support ITU-T Recommendation G.8273.2 'Class C' and 'Class D' system time error performance requirements.
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