IEEE Standard for Ethernet
Sponsored by the
LAN/MAN Standards Committee
IEEE
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IEEE Computer Society
IEEE Std 802.3™-2018
(Revision of
IEEE Std 802.3-2015)
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IEEE Std 802.3™-2018
(Revision of
IEEE Std 802.3-2015)
IEEE Standard for Ethernet
LAN/MAN Standards Committee
of the
IEEE Computer Society
Approved 14 June 2018
IEEE-SA Standards Board
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Copyright © 2018 by The Institute of Electrical and Electronics Engineers, Inc.
All rights reserved. Published 31 August 2018. Printed in the United States of America.
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Electronics Engineers, Incorporated.
PDF: ISBN 978-1-5044-5090-4 STD23246
Print: ISBN 978-1-5044-5091-1 STDPD23246
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Abstract: Ethernet local area network operation is specified for selected speeds of operation from
1 Mb/s to 400 Gb/s using a common media access control (MAC) specification and management
information base (MIB). The Carrier Sense Multiple Access with Collision Detection (CSMA/CD)
MAC protocol specifies shared medium (half duplex) operation, as well as full duplex operation.
Speed specific Media Independent Interfaces (MIIs) allow use of selected Physical Layer devices
(PHY) for operation over coaxial, twisted pair or fiber optic cables, or electrical backplanes.
System considerations for multisegment shared access networks describe the use of Repeaters
that are defined for operational speeds up to 1000 Mb/s. Local Area Network (LAN) operation is
supported at all speeds. Other specified capabilities include: various PHY types for access
networks, PHYs suitable for metropolitan area network applications, and the provision of power
over selected twisted pair PHY types.
Keywords: 2.5 Gigabit Ethernet; 5 Gigabit Ethernet; 10 Gigabit Ethernet; 25 Gigabit Ethernet;
40 Gigabit Ethernet; 100 Gigabit Ethernet; 200 Gigabit Ethernet; 400 Gigabit Ethernet; attachment
unit interface; AUI; Auto-Negotiation; Backplane Ethernet; data processing; DTE Power via the
MDI; Energy Efficient Ethernet; EPoC; EPON; EPON Protocol over Coax; Ethernet; Ethernet in the
First Mile; Ethernet passive optical network; express traffic; Fast Ethernet; Gigabit Ethernet; IEEE
802.3™; information exchange; LAN; local area network; management; MDI; medium dependent
interface; media independent interface; MIB; MII; MPMC; multi-point MAC control; PCS; PHY;
physical coding sublayer; Physical Layer; physical medium attachment; physical medium
dependent; PMA; PMD; PoDL; Power over Data Lines; Power over Ethernet; reconciliation
sublayer; repeater; RS; type field; VLAN tag
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