IEEE 802.3cx:2023
Active Standard amendment
Most Recent

IEEE 802.3cx:2023

IEEE Standard for Ethernet Amendment 6: Media Access Control (MAC) Service Interface and Management Parameters to Support Improved Precision Time Protocol (PTP) Timestamping Accuracy
Most recent standard

Summary

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 in support of ITU-T Recommendation G.8273.2 'Class C' and 'Class D' system time error performance requirements.

Notes

Active

Technical characteristics

Publisher Institute of Electrical and Electronics Engineers (IEEE)
Publication Date 04/21/2023
Edition
Page Count 79
EAN ---
ISBN ---
Weight (in grams) ---
Brochures https://dev.normadoc.fr/media/cache/app_product_document_thumbnail/c7/e3/16857e29f8df6518976959b7f961.png
No products.

Previous versions

IEEE 802.3-2022/Cor 1:2024

IEEE 802.3-2022/Cor 1:2024

IEEE Draft Standard for Ethernet - Corrigendum 1 - Multi-Gigabit Automotive Medium Dependent Interface (MDI) Return Loss
15/01/2025
Active
Most Recent
IEEE P802.3cw

IEEE P802.3cw

IEEE Draft Standard for Ethernet Amendment: Physical Layers and Management Parameters for 400 Gb/s Operation over DWDM (dense wavelength division multiplexing) systems
19/12/2023
Active
Most Recent
IEEE 802.3cy:2023

IEEE 802.3cy:2023

IEEE Standard for Ethernet Amendment 8: Physical Layer Specifications and Management Parameters for 25 Gb/s - Electrical Automotive Ethernet
11/08/2023
Active
Most Recent
IEEE 802.3cz:2023

IEEE 802.3cz:2023

IEEE Standard for Ethernet Amendment 7: Physical Layer Specifications and Management Parameters for Multi-Gigabit Glass Optical Fiber Automotive Ethernet
28/04/2023
Active
Most Recent
IEEE 802.3cx:2023

IEEE 802.3cx:2023

IEEE Standard for Ethernet Amendment 6: Media Access Control (MAC) Service Interface and Management Parameters to Support Improved Precision Time Protocol (PTP) Timestamping Accuracy
21/04/2023
Active
Most Recent
IEEE 802.3de:2022

IEEE 802.3de:2022

IEEE Standard for Ethernet - Amendment 5: Enhancements to the MAC Merge and Time Synchronization Service Interface for Point-to-Point 10 Mb/s Single Pair Ethernet
30/12/2022
Active
Most Recent
IEEE 802.3ck:2022

IEEE 802.3ck:2022

IEEE Standard for Ethernet Amendment 4: Physical Layer Specifications and Management Parameters for 100 Gb/s, 200 Gb/s, and 400 Gb/s Electrical Interfaces Based on 100 Gb/s Signaling
28/12/2022
Active
Most Recent
IEEE 802.3cs:2022

IEEE 802.3cs:2022

IEEE Standard for Ethernet Amendment 2: Physical Layers and Management Parameters for Increased-Reach Point-to-Multipoint Ethernet Optical Subscriber Access (Super-PON)
18/11/2022
Active
Most Recent
IEEE 802.3cp:2021

IEEE 802.3cp:2021

IEEE Standard for Ethernet -- Amendment 14: Bidirectional 10 Gb/s, 25 Gb/s, and 50 Gb/s Optical Access PHYs
16/07/2021
Superseded
Historical
IEEE 802.3ct:2021

IEEE 802.3ct:2021

IEEE Standard for Ethernet Amendment 13: Physical Layers and Management Parameters for 100 Gb/s Operation over DWDM Systems
09/07/2021
Superseded
Historical
IEEE 802.3cv:2021

IEEE 802.3cv:2021

IEEE Standard for Ethernet Amendment 12: Maintenance #15: Power over Ethernet
28/05/2021
Superseded
Historical
IEEE 802.3cu:2021

IEEE 802.3cu:2021

IEEE Standard for Ethernet - Amendment 11: Physical Layers and Management Parameters for 100 Gb/s and 400 Gb/s Operation over Single-Mode Fiber at 100 Gb/s per Wavelength
26/02/2021
Superseded
Historical
IEEE 802.3cr:2021

IEEE 802.3cr:2021

IEEE Standard for Ethernet Amendment 10: Maintenance #14: Isolation
24/02/2021
Superseded
Historical
IEEE 802.3ca:2020

IEEE 802.3ca:2020

IEEE Standard for Ethernet Amendment 9: Physical Layer Specifications and Management Parameters for 25 Gb/s and 50 Gb/s Passive Optical Networks
03/07/2020
Superseded
Historical
IEEE 802.3ch:2020

IEEE 802.3ch:2020

IEEE Standard for Ethernet--Amendment 8:Physical Layer Specifications and Management Parameters for 2.5 Gb/s, 5 Gb/s, and 10 Gb/s Automotive Electrical Ethernet
30/06/2020
Superseded
Historical
IEEE 802.3cm:2020

IEEE 802.3cm:2020

IEEE Standard for Ethernet -- Amendment 7: Physical Layer and Management Parameters for 400 Gb/s over Multimode Fiber
30/03/2020
Superseded
Historical
IEEE 802.3cq:2020

IEEE 802.3cq:2020

IEEE Standard for Ethernet Amendment 6: Maintenance #13: Power over Ethernet over 2 pairs
13/03/2020
Superseded
Historical
IEEE 802.3cg:2019

IEEE 802.3cg:2019

IEEE Standard for Ethernet - Amendment 5: Physical Layer Specifications and Management Parameters for 10 Mb/s Operation and Associated Power Delivery over a Single Balanced Pair of Conductors
05/02/2020
Superseded
Historical
IEEE 802.3cn:2019

IEEE 802.3cn:2019

IEEE Standard for Ethernet - Amendment 4: Physical Layers and Management Parameters for 50Gb/s, 200Gb/s, and 400Gb/s Operation over Single-Mode Fiber
20/12/2019
Superseded
Historical
IEEE 802.3cd:2018

IEEE 802.3cd:2018

IEEE Standard for Ethernet - Amendment 3: Media Access Control Parameters for 50 Gb/s and Physical Layers and Management Parameters for 50 Gb/s, 100 Gb/s, and 200 Gb/s Operation
14/02/2019
Superseded
Historical
IEEE 802.3bt:2018

IEEE 802.3bt:2018

IEEE Standard for Ethernet Amendment 2: Physical Layer and Management Parameters for Power over Ethernet over 4 pairs
31/01/2019
Superseded
Historical
IEEE 802.3cb:2018

IEEE 802.3cb:2018

IEEE Standard for Ethernet - Amendment 1:Physical Layer Specifications and Management Parameters for 2.5 Gb/s and 5 Gb/s Operation over Backplane
04/01/2019
Superseded
Historical
IEEE 802.3:2018

IEEE 802.3:2018

IEEE Standard for Ethernet
31/08/2018
Superseded
Historical
IEEE 802.3cc:2017

IEEE 802.3cc:2017

IEEE Standard for Ethernet - Amendment 11: Physical Layer and Management Parameters for Serial 25 Gb/s Ethernet Operation Over Single-Mode Fiber
15/01/2018
Superseded
Historical
IEEE 802.3bs:2017

IEEE 802.3bs:2017

IEEE Standard for Ethernet Amendment 10: Media Access Control Parameters, Physical Layers, and Management Parameters for 200 Gb/s and 400 Gb/s Operation
12/12/2017
Superseded
Historical
IEEE 802.3-2015/Cor 1:2017

IEEE 802.3-2015/Cor 1:2017

IEEE Standard for Ethernet - Corrigendum 1: Multi-lane Timestamping
21/04/2017
Superseded
Historical
IEEE 802.3bv:2017

IEEE 802.3bv:2017

IEEE Standard for Ethernet Amendment 9: Physical Layer Specifications and Management Parameters for 1000 Mb/s Operation Over Plastic Optical Fiber
14/03/2017
Superseded
Historical
IEEE 802.3bu:2016

IEEE 802.3bu:2016

IEEE Standard for Ethernet--Amendment 8: Physical Layer and Management Parameters for Power over Data Lines (PoDL) of Single Balanced Twisted-Pair Ethernet
07/02/2017
Superseded
Historical
IEEE 802.3bn:2016

IEEE 802.3bn:2016

IEEE Standard for Ethernet Amendment 6: Physical Layer Specifications and Management Parameters for Ethernet Passive Optical Networks Protocol over Coax
07/12/2016
Superseded
Historical
IEEE 802.3bz:2016

IEEE 802.3bz:2016

IEEE Standard for Ethernet Amendment 7: Media Access Control Parameters, Physical Layers, and Management Parameters for 2.5 Gb/s and 5 Gb/s Operation, Types 2.5GBASE-T and 5GBASE-T
18/10/2016
Superseded
Historical
IEEE 802.3br:2016

IEEE 802.3br:2016

IEEE Standard for Ethernet Amendment 5: Specification and Management Parameters for Interspersing Express Traffic
14/10/2016
Superseded
Historical
IEEE 802.3bp:2016

IEEE 802.3bp:2016

IEEE Standard for Ethernet Amendment 4: Physical Layer Specifications and Management Parameters for 1 Gb/s Operation over a Single Twisted-Pair Copper Cable
20/09/2016
Superseded
Historical
IEEE 802.3bq:2016

IEEE 802.3bq:2016

IEEE Standard for Ethernet Amendment 3: Physical Layer and Management Parameters for 25 Gb/s and 40 Gb/s Operation, Types 25GBASE-T and 40GBASE-T
08/09/2016
Superseded
Historical
IEEE 802.3by:2016

IEEE 802.3by:2016

IEEE Standard for Ethernet -- Amendment 2: Media Access Control Parameters, Physical Layers, and Management Parameters for 25 Gb/s Operation Amendment 2: Media Access Control Parameters,
Physical Layers, and Management Parameters for 25 Gb/s Operation
29/07/2016
Superseded
Historical
IEEE 802.3bw:2015

IEEE 802.3bw:2015

IEEE Standard for Ethernet Amendment 1: Physical Layer Specifications and Management Parameters for 100 Mb/s Operation over a Single Balanced Twisted Pair Cable (100BASE-T1)
07/03/2016
Superseded
Historical
IEEE 802.3:2015

IEEE 802.3:2015

IEEE Standard for Ethernet
04/03/2016
Superseded
Historical
IEEE 802.3bm:2015

IEEE 802.3bm:2015

IEEE Standard for Ethernet - Amendment 3: Physical Layer Specifications and Management Parameters for 40 Gb/s and 100 Gb/s Operation over Fiber Optic Cables
27/03/2015
Superseded
Historical
IEEE 802.3bj:2014

IEEE 802.3bj:2014

IEEE Standard for Ethernet Amendment 2: Physical Layer Specifications and Management Parameters for 100 Gb/s Operation Over Backplanes and Copper Cables
03/09/2014
Superseded
Historical
IEEE 802.3bk:2013

IEEE 802.3bk:2013

IEEE Standard for Ethernet - Amendment 1: Physical Layer Specifications and Management Parameters for Extended Ethernet Passive Optical Networks
30/08/2013
Superseded
Historical
IEEE 802.3:2012

IEEE 802.3:2012

IEEE Standard for Ethernet
28/12/2012
Superseded
Historical
IEEE 802.3bd:2011

IEEE 802.3bd:2011

IEEE Standard for Information technology-- Local and metropolitan area networks-- Specific requirements-- Part 3: CSMA/CD Access Method and Physical Layer Specifications - Amendment 8: MAC Control Frame for Priority-based Flow Control
10/08/2011
Superseded
Historical
IEEE 802.3bf:2011

IEEE 802.3bf:2011

IEEE Standard for Information technology-- Local and metropolitan area networks-- Part 3: CSMA/CD Access Method and Physical Layer Specifications Amendment 7: Media Access Control (MAC) Service Interface and Management Parameters to Support Time Synchronization Protocols
15/07/2011
Superseded
Historical
IEEE 802.3bg:2011

IEEE 802.3bg:2011

IEEE Standard for Information technology-- Local and metropolitan area networks-- Specific requirements-- Part 3: CSMA/CD Access Method and Physical Layer Specifications Amendment 6: Physical Layer and Management Parameters for Serial 40 Gb/s Ethernet Operation Over Single Mode Fiber
31/03/2011
Superseded
Historical
IEEE 802.3az:2010

IEEE 802.3az:2010

IEEE Standard for Information technology-- Local and metropolitan area networks-- Specific requirements-- Part 3: CSMA/CD Access Method and Physical Layer Specifications Amendment 5: Media Access Control Parameters, Physical Layers, and Management Parameters for Energy-Efficient Ethernet
27/10/2010
Superseded
Historical
IEEE 802.3ba:2010

IEEE 802.3ba:2010

IEEE Standard for Information technology-- Local and metropolitan area networks-- Specific requirements-- Part 3: CSMA/CD Access Method and Physical Layer Specifications Amendment 4: Media Access Control Parameters, Physical Layers, and Management Parameters for 40 Gb/s and 100 Gb/s Operation
22/06/2010
Superseded
Historical
IEEE 802.3-2008/Cor 1:2009

IEEE 802.3-2008/Cor 1:2009

IEEE Standard for Information technology-- Local and metropolitan area networks-- Specific requirements-- Part 3: Carrier Sense Multiple Access with Collision Detection (CSMA/CD) Access Method and Physical Layer Specifications Corrigendum 1: Timing Considerations for PAUSE Operation
01/02/2010
Superseded
Historical
IEEE 802.3av:2009

IEEE 802.3av:2009

IEEE Standard for Information technology-- Local and metropolitan area networks-- Specific requirements-- Part 3: CSMA/CD Access Method and Physical Layer Specifications Amendment 1: Physical Layer Specifications and Management Parameters for 10 Gb/s Passive Optical Networks
30/10/2009
Superseded
Historical
IEEE 802.3at:2009

IEEE 802.3at:2009

IEEE Standard for Information technology-- Local and metropolitan area networks-- Specific requirements-- Part 3: CSMA/CD Access Method and Physical Layer Specifications Amendment 3: Data Terminal Equipment (DTE) Power via the Media Dependent Interface (MDI) Enhancements
30/10/2009
Superseded
Historical
IEEE 802.3bc:2009

IEEE 802.3bc:2009

IEEE Standard for Information technology-- Local and metropolitan area networks-- Specific requirements-- Part 3: CSMA/CD Access Method and Physical Layer Specifications Amendment 2: Ethernet Organizationally Specific Type, Length, Value (TLVs)
28/09/2009
Superseded
Historical
IEEE 802.3:2008

IEEE 802.3:2008

IEEE Standard for Information technology--Telecommunications and information exchange between systems--Local and metropolitan area networks--Specific requirements Part 3: Carrier Sense Multiple Access with Collision Detection (CSMA/CD) Access Method and Physical Layer Specifications
26/12/2008
Superseded
Historical
IEEE 802.3-2005/Cor 2:2007

IEEE 802.3-2005/Cor 2:2007

IEEE Standard for Information Technology - Telecommunications and Information Exchange Between Systems - Local and Metropolitan Area Networks - Specific Requirements Part 3: Carrier Sense Multiple Access with Collision Detection (CSMA/CD) Access Method and Physical Layer Specifications - Corrigendum 2: IEEE Std 802.3an-2006 10GBASE-T Correction
17/08/2007
Superseded
Historical
IEEE 802.3ap:2007

IEEE 802.3ap:2007

IEEE Standard for Information technology-- Local and metropolitan area networks-- Specific requirements-- Part 3: CSMA/CD Access Method and Physical Layer Specifications - Amendment: Ethernet Operation Over Electrical Backplanes
22/05/2007
Superseded
Historical
IEEE 802.3as:2006

IEEE 802.3as:2006

IEEE Standard for Information technology-- Telecommunications and information exchange between systems-- Local and metropolitan area networks-- Specific requirements Part 3: Carrier Sense Multiple Access with Collision Detection (CSMA/CD) Access Method and Physical Layer Specifications
13/11/2006
Superseded
Historical
IEEE 802.3aq:2006

IEEE 802.3aq:2006

IEEE Standard for Information technology -- Part 3: Carrier Sense Multiple Access with Collision Detection (CSMA/CD) Access Method and Physical Layer Specifications - Amendment 2: Physical Layer and Management Parameters for 10 Gb/s Operation, Type 10GBASE-LRM
16/10/2006
Superseded
Historical
IEEE 802.3an:2006

IEEE 802.3an:2006

IEEE Standard for Information Technology - Telecommunications and Information Exchange Between Systems – LAN/MAN - Specific Requirements Part 3: CSMA/CD Access Method and Physical Layer Specifications - Amendment: Physical Layer and Management Parameters for 10 Gb/s Operation, Type 10GBASE-T
01/09/2006
Superseded
Historical
IEEE 802.3-2005/Cor 1:2006

IEEE 802.3-2005/Cor 1:2006

IEEE Standard for Information Technology - Telecommunications and Information Exchange Between Systems - Local and Metropolitan Area Networks - Specific Requirements Part 3: Carrier Sense Multiple Access with Collision Detection (CSMA/CD) Access Method and Physical Layer Specifications - Corrigendum 1
26/06/2006
Superseded
Historical
IEEE 802.3:2005

IEEE 802.3:2005

IEEE Standard for Information Technology - Telecommunications and Information Exchange Between Systems - Local and Metropolitan Area Networks - Specific Requirements Part 3: Carrier Sense Multiple Access with Collision Detection (CSMA/CD) Access Method and Physical Layer Specifications
09/12/2005
Superseded
Historical
IEEE 802.3ah:2004

IEEE 802.3ah:2004

IEEE Standard for Information technology-- Local and metropolitan area networks-- Part 3: CSMA/CD Access Method and Physical Layer Specifications Amendment: Media Access Control Parameters, Physical Layers, and Management Parameters for Subscriber Access Networks
07/09/2004
Superseded
Historical
IEEE 802.3ak:2004

IEEE 802.3ak:2004

IEEE Standard for Information technology-- Local and metropolitan area networks-- Part 3: CSMA/CD Access Method and Physical Layer Specifications Amendment: Physical Layer and Management Parameters for 10 Gb/s Operation, Type 10GBASE-CX4
01/03/2004
Superseded
Historical
IEEE 802.3aj:2003

IEEE 802.3aj:2003

Standard for Information Technology - Telecommunications and Information Exchange Between Systems - Local and Metropolitan Area Networks - Specific Requirements - Part 3: Carrier Sense Multiple Access with Collision Detection (CSMA/CD) Access Method and Physical Layer Specifications - Maintenance 7
26/09/2003
Superseded
Historical
IEEE 802.3af:2003

IEEE 802.3af:2003

IEEEE Standard for Information Technology - Telecommunications and Information Exchange Between Systems - Local and Metropolitan Area Networks - Specific Requirements - Part 3: Carrier Sense Multiple Access with Collision Detection (CSMA/CD) Access Method and Physical Layer Specifications - Data Terminal Equipment (DTE) Power Via Media Dependent Interface (MDI)
17/06/2003
Superseded
Historical
IEEE 802.3ae:2002

IEEE 802.3ae:2002

IEEE Standard for Information technology - Local and metropolitan area networks - Part 3: CSMA/CD Access Method and Physical Layer Specifications - Media Access Control (MAC) Parameters, Physical Layer, and Management Parameters for 10 Gb/s Operation
26/08/2002
Superseded
Historical
IEEE 802.3:2002

IEEE 802.3:2002

IEEE Standard for Information technology-Telecommunications and information exchange between systems-Local and metropolitan area networks-Specific requirements Part 3: Carrier sense multiple access with collision detection (CSMA/CD) access method and physical layer specifications
08/03/2002
Superseded
Historical
IEEE 802.3:2000

IEEE 802.3:2000

IEEE Standard for Information Technology - LAN/MAN - Specific Requirements - Part 3: Carrier Sense Multiple Access with Collision Detection (CSMA/CD) Access Method and Physical Layer Specifications
16/10/2000
Superseded
Historical
IEEE 802.3ad:2000

IEEE 802.3ad:2000

IEEE Standard for Information Technology - Local and Metropolitan Area Networks - Part 3: Carrier Sense Multiple Access with Collision Detection (CSMA/CD) Access Method and Physical Layer Specifications-Aggregation of Multiple Link Segments
28/06/2000
Superseded
Historical
IEEE 802.3ab:1999

IEEE 802.3ab:1999

IEEE Standard for Information Technology - Telecommunications and information exchange between systems - Local and Metropolitan Area Networks - Part 3: Carrier Sense Multiple Access with Collision Detection (CSMA/CD) Access Method and Physical Layer Specifications - Physical Layer Parameters and Specifications for 1000 Mb/s Operation over 4 pair of Category 5 Balanced Copper Cabling, Type 1000BASE-T
26/07/1999
Superseded
Historical
IEEE 802.3ac:1998

IEEE 802.3ac:1998

IEEE Standard for Information technology - Telecommunications and information exchange between systems - Local and metropolitan area networks - Specific requirements Part 3: Carrier sense multiple access with collision detection (CSMA/CD) frame extensions for Virtual Bridged Local Area Networks (VLAN) tagging on 802.3 networks
06/11/1998
Superseded
Historical
IEEE 802.3:1998

IEEE 802.3:1998

IEEE Standards for Information technology—Telecommunications and information exchange between systems—Local and metropolitan area networks-Specific requirements-Part 3: Carrier Sense Multiple Access with Collision Detection (CSMA/CD) Access Method and Physical Layer Specifications
28/09/1998
Superseded
Historical
IEEE 802.3x:1997

IEEE 802.3x:1997

IEEE Standards for Local and Metropolitan Area Networks: Supplements to Carrier Sense Multiple Access With Collision Detection (CSMA/CD) Access Method and Physical Layer Specifications - Specification for 802.3 Full Duplex Operation and Physical Layer Specification for 100 Mb/s Operation on Two Pairs of Category 3 Or Better Balanced Twisted Pair Cable (100BASE-T2)
18/11/1997
Superseded
Historical
IEEE 802.3r:1996

IEEE 802.3r:1996

IEEE Standard Carrier Sense Multiple Access with Collision Detection (CSMA/CD) Access Method and Physical Layer Specifications - Type 10BASE5 Medium Attachment Unit (MAU) Protocol Implementation Conformance Statement (PICS) Proforma (Subclause 8.8)
09/12/1996
Superseded
Historical
IEEE 802.3u:1995

IEEE 802.3u:1995

IEEE Standards for Local and Metropolitan Area Networks: Supplement - Media Access Control (MAC) Parameters, Physical Layer, Medium Attachment Units, and Repeater for 100Mb/s Operation, Type 100BASE-T (Clauses 21-30)
26/10/1995
Superseded
Historical
IEEE 802.3j:1993

IEEE 802.3j:1993

Supplement to 802.3 - Fiber Optic Active and Passive Star-Based Segments, Type 10BASE-F (Sections 15-18)
12/10/1993
Superseded
Historical
IEEE 802.3k:1992

IEEE 802.3k:1992

Supplement to 802.3 - Layer Management for 10 Mb/s Baseband Repeaters (Section 19)
09/11/1992
Superseded
Historical
IEEE 802.3i:1990

IEEE 802.3i:1990

IEEE Standard for Local and Metropolitan Area Networks - System Considerations for Multi-segment 10 Mb/S Baseband Networks (Section 13) and Twisted-Pair Medium Attachment Unit (MAU) and Baseband Medium, Type 10BASE-T (Section 14)
30/12/1990
Superseded
Historical
IEEE 802.3:1985

IEEE 802.3:1985

IEEE Standards for Local Area Networks: Carrier Sense Multiple Access with Collision Detection (CSMA/CD) Access Method and Physical Layer Specifications
31/12/1984
Superseded
Historical
Contact us