ISO/IEC/IEEE 8802-3:2021/Amd 4:2021

INTERNATIONAL ISO/IEC/
STANDARD IEEE
8802-3
Third edition
2021-02
AMENDMENT 4
2021-10
Telecommunications and exchange
between information technology
systems — Requirements for local and
metropolitan area networks —
Part 3:
Standard for Ethernet
AMENDMENT 4: Physical layers and
management parameters for 50 Gb/s,
200 Gb/s, and 400 Gb/s operation over
single‐mode fiber
Télécommunications et échange entre systèmes informatiques —
Exigences pour les réseaux locaux et métropolitains —
Partie 3: Norme pour Ethernet
AMENDEMENT 4: Couches physiques et paramètres de gestion pour
le fonctionnement à 50 Gb/s, 200 Gb/s et 400 Gb/s sur des fibres
unimodales
Reference number
ISO/IEC/IEEE 8802-3:2021/Amd.4:2021(E)
© ISO/IEC 2021
© IEEE 2019

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ISO/IEC/IEEE 8802-3:2021/Amd.4:2021(E)
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ISO/IEC/IEEE 8802-3:2021/Amd.4:2021(E)
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ISO/IEC/IEEE 8802-3:2021/Amd 4 was prepared by the LAN/MAN of the IEEE Computer Society (as
IEEE Std 802-3cn-2019) and drafted in accordance with its editorial rules. It was adopted, under the “fast-
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Subcommittee SC 6, Telecommunications and information exchange between systems.
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IEEE Std 802.3cn™-2019
(Amendment to IEEE Std 802.3™-2018
as amended by IEEE Std 802.3cb™-2018,
IEEE Std 802.3bt™-2018, and
IEEE Std 802.3cd™-2018)
IEEE Standard for Ethernet
Amendment 4:
Physical Layers and Management
Parameters for 50 Gb/s, 200 Gb/s, and
400 Gb/s Operation over Single-Mode Fiber
Developed by the
LAN/MAN Standards Committee
of the
IEEE Computer Society
Approved 7 November 2019
IEEE SA Standards Board

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ISO/IEC/IEEE 8802-3:2021/Amd.4:2021(E)
Abstract: This amendment to IEEE Std 802.3-2018 adds Physical Layer (PHY) specifications and
management parameters for 50 Gb/s, 200 Gb/s, and 400 Gb/s operation over single-mode fiber
with reaches of at least 40 km.
Keywords: 50 Gb/s Ethernet, 50GBASE-ER, 200 Gb/s Ethernet, 200GBASE-ER4, 400 Gb/s
Ethernet, 400GBASE-ER8, amendment, EEE, Energy-Efficient Ethernet, Ethernet, FEC, forward
error correction, IEEE 802.3™, IEEE 802.3cn™, PAM4, physical medium dependent sublayer,
PMD sublayer, single-mode fiber, SMF
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Copyright © 2019 by The Institute of Electrical and Electronics Engineers, Inc.
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PDF: ISBN 978-1-5044-6384-3 STD24016
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ISO/IEC/IEEE 8802-3:2021/Amd.4:2021(E)
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ISO/IEC/IEEE 8802-3:2021/Amd.4:2021(E)
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ISO/IEC/IEEE 8802-3:2021/Amd.4:2021(E)
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ISO/IEC/IEEE 8802-3:2021/Amd.4:2021(E)
Participants
The following individuals were officers and members of the IEEE 802.3 Working Group at the beginning of
the IEEE P802.3cn Working Group ballot.
David J. Law, IEEE 802.3 Working Group Chair
Adam Healey, IEEE 802.3 Working Group Vice-Chair
Pete Anslow, IEEE 802.3 Working Group Secretary
Steven B. Carlson, IEEE 802.3 Working Group Executive Secretary
Valerie Maguire, IEEE 802.3 Working Group Treasurer
John D’Ambrosia, IEEE P802.3cn 50 Gb/s, 200 Gb/s, and 400 Gb/s over Single-Mode Fiber
Task Force Chair
Pete Anslow, IEEE P802.3cn 50 Gb/s, 200 Gb/s, and 400 Gb/s over Single-Mode Fiber Task Force
Editor-in-Chief
Peter Stassar, IEEE P802.3cn 50 Gb/s, 200 Gb/s, and 400 Gb/s over Single-Mode Fiber Task Force
Editor for Clauses 122 and 139
John Abbott Hormoz Djahanshahi
John Johnson
David Abramson Curtis Donahue
Chad Jones
Andrea Agnes Liang Du
Peter Jones
Dale Amason Kathryn Dube
Lokesh Kabra
Hongming An Mike Dudek
Manabu Kagami
Jes Asmussen Marc Dupuis
Upen Kareti
Richard Baca Frank Effenberger
Yasuaki Kawatsu
David Estes
Tim Baggett
Yong Kim
John Ewen
Amrik Bains
Mark Kimber
Thananya Baldwin Borhan Fathi Moghadam
Jonathan King
Steven Baumgartner Vincent Ferretti
Michael Klempa
Denis Beaudoin Brian Franchuk
Curtis Knittle
Liav Ben-Artsi Matthias Fritsche
Piergiorgio Beruto Richard Frosch Elizabeth Kochuparambil
Vipul Bhatt Shiyong Fu Wojciech Koczwara
Gao Bo Mike Gardner
Paul Kolesar
Claude Gauthier
Brad Booth
Taiji Kondo
Martin Bouda Ali Ghiasi
Glen Kramer
David Brandt Joel Goergen
Olaf Krieger
Ralf-Peter Braun Zhigang Gong
Hans Lackner
Paul Brooks Steven Gorshe
Jeffrey Lapak
Alan Brown Jens Gottron
Mark Laubach
Matthew Brown Steffen Graber
Han Hyub Lee
Michal Brychta Olaf Grau
June Hee Lee
Gary Burrell Robert Grow
Alex Levin
Jairo Bustos Heredia Mark Gustlin
David Lewis
Adrian Butter Marek Hajduczenia
John Calvin Hayden Haynes Jon Lewis
Clark Carty Xiang He
David Li
Craig Chabot Howard Heck
Mike-Peng Li
David Chalupsky Rajmohan Hegde
Jane Lim
Frank Chang Brian Holden
Alex Lin
Xin Chang Rita Horner
Robert Lingle
Golam Choudhury Bernd Horrmeyer
Dekun Liu
Keng Hua Chuang Gergely Huszak
Hai-Feng Liu
Kamal Dalmia Yasuhiro Hyakutake
Karen Liu
Piers Dawe Jonathan Ingham
Zhenyu Liu
Fred Dawson Kazuhiko Ishibe
William Lo
John Deandrea Hideki Isono
Yuchun Lu
Gerrit den Besten Tom Issenhuth
Miklos Lukacs
Claudio DeSanti Kenneth Jackson
Chris Diminico Andrew Jimenez Kent Lusted
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ISO/IEC/IEEE 8802-3:2021/Amd.4:2021(E)
Ilya Lyubomirsky Christopher Pohl Nathan Tracy
Zahy Madgar William Powell David Tremblay
Jeffery Maki Dino Pozzebon Stephen Trowbridge
David Malicoat Rick Rabinovich Ta Chin Tseng
Flavio Marques Zvi Rechtman Ed Ulrichs
Arthur Marris Alon Regev Alexander Umnov
Chris Mash Duane Remein Ricky Vernickel
Takeo Masuda Victor Renteria Marco Vitali
Kirsten Matheus Salvatore Rotolo Robert Voss
Erdem Matoglu Alexander Rysin Dylan Walker
Toshiaki Sakai
Marco Mazzini Haifei Wang
Hamid Salehi
Mick McCarthy Roy Wang
Brett McClellan Sam Sambasivan
Tongtong Wang
Larry McMillan Edward Sayre
Xinyuan Wang
Greg McSorley James Schuessler
Xuehuan Wang
Richard Mellitz Steve Sekel Christoph Wechsler
Martin Miller Masood Shariff Brian Welch
Toshiyuki Moritake Mizuki Shirao Matthias Wendt
Harald Mueller Jialong Shuai Natalie Wienckowski
Thomas Mueller Jeff Slavick James Withey
Edward Nakamoto Daniel Smith Mau-Lin Wu
Paul Neveux Scott Sommers Peter Wu
Gary Nicholl Tom Souvignier Markus Wucher
Shawn Nicholl Bryan Sparrowhawk Dayin Xu
John Nolan Edward Sprague Yu Xu
Kevin Noll Heath Stewart Shuto Yamamoto
Mark Nowell David Stover Adrian Young
David Ofelt Junqing Sun James Young
Josef Ohni Liyang Sun Lennart Yseboodt
Tom Palkert Steve Swanson Andrew Zambell
Sujan Pandey Bharat Tailor Conrad Zerna
Carlos Pardo Tomoo Takahara Richard (Yujia) Zhou
Earl Parsons Kohichi Tamura Yan Zhuang
Gerald Pepper Mehmet Tazebay Martin Zielinski
Phong Pham
Ronald Tellas George Zimmerman
David Piehler
Geoffrey Thompson Pavel Zivny
Rick Pimpinella Harald Zweck
Pirooz Tooyserkani
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ISO/IEC/IEEE 8802-3:2021/Amd.4:2021(E)
The following members of the individual balloting committee voted on this standard. Balloters may have
voted for approval, disapproval, or abstention.
Rob Aekins David Hess Thomas Palkert
Thomas Alexander Werner Hoelzl Carlos Pardo
Rita Horner
Pete Anslow Bansi Patel
C. Huntley David Piehler
Burrell Best
Yasuhiro Hyakutake Rick Pimpinella
Rich Boyer
Atsushi Ito Adee Ran
Ralf-Peter Braun
Raj Jain
R. K. Rannow
Nancy Bravin
Peter Jones Alon Regev
Matthew Brown
Lokesh Kabra Robert Robinson
Demetrio Bucaneg
Piotr Karocki
Thomas Starai
Gary Burrell
Stuart Kerry Peter Stassar
Jairo Bustos Heredia
Yongbum Kim Walter Struppler
William Byrd
Mark Laubach Mitsutoshi Sugawara
John Calvin
David J. Law
James Theodoras
Steven B. Carlson
Hyeong Ho Lee David Thompson
Juan Carreon
David Lewis David Tremblay
Chan Chen
Jon Lewis Stephen Trowbridge
John D’Ambrosia
Michael Lynch Mark-Rene Uchida
Piers J. G. Dawe
Valerie Maguire Alexander Umnov
John Deandrea
Jeffery Maki Dmitri Varsanofiev
Marc Dupuis
David Malicoat George Vlantis
Avraham Freedman
Arthur Marris Lisa Ward
Ali Ghiasi
Michael Maytum Keith Waters
James Gilb
Richard Mellitz Chun Yu Charles Wong
Zhigang Gong
Paul Neveux
James Young
Randall Groves
Nick S. A. Nikjoo Yu Yuan
Marek Hajduczenia
Satoshi Obara Oren Yuen
Marco Hernandez Zhen Zhou
When the IEEE SA Standards Board approved this standard on 7 November 2019, it had the following
membership:
Gary Hoffman, Chair
Ted Burse, Vice Chair
Jean-Philippe Faure, Past Chair
Konstantinos Karachalios, Secretary
Masayuki Ariyoshi David J. Law Annette Reilly
Stephen D. Dukes Joseph Levy Dorothy Stanley
Howard Li Sha Wei
J. Travis Griffith
Guido Hiertz Xiaohui Liu Phil Wennblom
Christel Hunter Kevin Lu Philip Winston
Joseph L. Koepfinger* Daleep Mohla Howard Wolfman
Andrew Myles
Thomas Koshy Feng Wu
John D. Kulick Jingyi Zhou
*Member Emeritus
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ISO/IEC/IEEE 8802-3:2021/Amd.4:2021(E)
Introduction
This introduction is not part of IEEE Std 802.3cn-2019, IEEE Standard for Ethernet. Amendment 4: Physical Layers
and Management Parameters for 50 Gb/s, 200 Gb/s, and 400 Gb/s Operation over Single-Mode Fiber.
IEEE Std 802.3™ was first published in 1985. Since the initial publication, many projects have added
functionality or provided maintenance updates to the specifications and text included in the standard. Each
IEEE 802.3 project/amendment is identified with a suffix (e.g., IEEE Std 802.3ba™-2010).
The half duplex Media Access Control (MAC) protocol specified in IEEE Std 802.3-1985 is Carrier Sense
Multiple Access with Collision Detection (CSMA/CD). This MAC protocol was key to the experimental
Ethernet developed at Xerox Palo Alto Research Center, which had a 2.94 Mb/s data rate. Ethernet at
10 Mb/s was jointly released as a public specification by Digital Equipment Corporation (DEC), Intel and
Xerox in 1980. Ethernet at 10 Mb/s was approved as an IEEE standard by the IEEE Standards Board in 1983
and subsequently published in 1985 as IEEE Std 802.3-1985. Since 1985, new media options, new speeds of
operation, and new capabilities have been added to IEEE Std 802.3. A full duplex MAC protocol was added
in 1997.
Some of the major additions to IEEE Std 802.3 are identified in the marketplace with their project number.
This is most common for projects adding higher speeds of operation or new protocols. For example, IEEE
Std 802.3u™ added 100 Mb/s operation (also called Fast Ethernet), IEEE Std 802.3z added 1000 Mb/s
operation (also called Gigabit Ethernet), IEEE Std 802.3ae added 10 Gb/s operation (also called 10 Gigabit
Ethernet), IEEE Std 802.3ah™ specified access network Ethernet (also called Ethernet in the First Mile) and
IEEE Std 802.3ba added 40 Gb/s operation (also called 40 Gigabit Ethernet) and 100 Gb/s operation (also
called 100 Gigabit Ethernet). These major additions are all now included in and are superseded by IEEE Std
802.3-2018 and are not maintained as separate documents.
At the date of publication for IEEE Std 802.3cn-2019, IEEE Std 802.3 was composed of the following
documents:
IEEE Std 802.3-2018
Section One—Includes Clause 1 through Clause 20 and Annex A through Annex H and Annex 4A.
Section One includes the specifications for 10 Mb/s operation and the MAC, frame formats and
service interfaces used for all speeds of operation.
Section Two—Includes Clause 21 through Clause 33 and Annex 22A through Annex 33E. Section
Two includes management attributes for multiple protocols and speed of operation as well as
specifications for providing power over twisted pair cabling for multiple operational speeds. It also
includes general information on 100 Mb/s operation as well as most of the 100 Mb/s Physical Layer
specifications.
Section Three—Includes Clause 34 through Clause 43 and Annex 36A through Annex 43C. Section
Three includes general information on 1000 Mb/s operation as well as most of the 1000 Mb/s Physical
Layer specifications.
Section Four—Includes Clause 44 through Clause 55 and Annex 44A through Annex 55B. Section
Four includes general information on 10 Gb/s operation as well as most of the 10 Gb/s Physical Layer
specifications.
Section Five—Includes Clause 56 through Clause 77 and Annex 57A through Annex 76A. Clause 56
through Clause 67 and Clause 75 through Clause 77, as well as associated annexes, specify subscriber
access and other Physical Layers and sublayers for operation from 512 kb/s to 10 Gb/s, and defines
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ISO/IEC/IEEE 8802-3:2021/Amd.4:2021(E)
services and protocol elements that enable the exchange of IEEE Std 802.3 format frames between
stations in a subscriber access network. Clause 68 specifies a 10 Gb/s Physical Layer specification.
Clause 69 through Clause 74 and associated annexes specify Ethernet operation over electrical
backplanes at speeds of 1000 Mb/s and 10 Gb/s.
Section Six—Includes Clause 78 through Clause 95 and Annex 83A through Annex 93C. Clause 78
specifies Energy-Efficient Ethernet. Clause 79 specifies IEEE 802.3 Organizationally Specific Link
Layer Discovery Protocol (LLDP) type, length, and value (TLV) information elements. Clause 80
through Clause 95 and associated annexes include general information on 40 Gb/s and 100 Gb/s
operation as well the 40 Gb/s and 100 Gb/s Physical Layer specifications. Clause 90 specifies Ethernet
support for time synchronization protocols.
Section Seven—Includes Clause 96 through Clause 115 and Annex 97A through Annex 115A.
Clause 96 through Clause 98, Clause 104, and associated annexes, specify Physical Layers and
optional features for 100 Mb/s and 1000 Mb/s operation over a single twisted pair. Clause 100 through
Clause 103, as well as associated annexes, specify Physical Layers for the operation of the EPON
protocol over coaxial distribution networks. Clause 105 through Clause 114 and associated annexes
include general information on 25 Gb/s operation as well as 25 Gb/s Physical Layer specifications.
Clause 99 specifies a MAC merge sublayer for the interspersing of express traffic. Clause 115 and its
associated annex specify a Physical Layer for 1000 Mb/s operation over plastic optical f
...