IEEE Std 802.3
™
-2008
(Revision of IEEE Std 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
IEEE
3 Park Avenue
New York, NY 10016-5997, USA
26 December 2008
IEEE Computer Society
Sponsored by the
LAN/MAN Standards Committee
802.3
TM
IEEE Std 802.3
™
-2008
(Revision of IEEE Std 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
Sponsor
LAN/MAN Standards Committee
of the
IEEE Computer Society
Approved 26 September 2008
IEEE-SA Standards Board
Abstract: Ethernet local area network operation is specified for selected speeds of operation from
1 Mb/s to 10 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. System considerations for
multisegment shared access networks describe the use of Repeaters which 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: 10BASE; 100BASE
; 1000BASE; 10GBASE; 10 Gigabit Ethernet; attachment unit
inte
rface; AUI; Auto Negotiation; data processing; DTE Power via the MDI; EPON; Ethernet;
Ethernet in the First Mile; Ethernet passive optical network; Fast Ethernet; Gigabit Ethernet; GMII;
information exchange; local area network; management; medium dependent interface; media
independent interface; MDI; MIB; MII; XGMII; PHY; physical coding sublayer; Physical Layer;
physical medium attachment; PMA; Power over Ethernet; repeater; type field; VLAN TAG
The Institute of Electrical and Electronics Engineers, Inc.
3 Park Avenue, New York, NY 10016-5997, USA
Copyright © 2008 by the Institute of Electrical and Electronics Engineers, In
c.
All rights reserved. Published 26 December 2008. Printed in the United States of America.
IEEE and 802 are registered trademarks in the U.S. Patent & Trademark Office, owned by The Institute of El
ectrical and
Electronics Engineers, Incorporated.
PDF: ISBN 973-07381-5796-2 STD95819
Print: ISBN 973-07381-5797-9 STDPD95819
No part of this publication may be reproduced in any form, in an electronic
retrieval system or
otherwise, without the prior
written permission of the publisher.
IEEE Standards documents are developed within the IEEE Societies and the Standards Coordinating Committees of the
IEEE Standards Association (IEEE-SA) Standards Board. The IEEE develops its standards through a consensus
development process, approved by the American National Standards Institute, which brings together volunteers
representing varied viewpoints and interests to achieve the final product. Volunteers are not necessarily members of the
Institute and serve without compensation. While the IEEE administers the process and establishes rules to promote fairness
in the consensus development process, the IEEE does not independently evaluate, test, or verify the accuracy of any of the
information or the soundness of any judgments contained in its standards.
Use of an IEEE Standard is wholly volunta
ry. The IEEE disclaims
liability for any personal injury, property or other
damage, of any nature whatsoever, whether special, indirect, consequential, or compensatory, directly or indirectly resulting
from the publication, use of, or reliance upon this, or any other IEEE Standard document.
The IEEE does not warrant or represent the accuracy or content of the mate
rial contained herein, and expressly disclaims
any express or implied warranty, including any implied warranty of merchantability or fitness for a specific purpose, or that
the use of the material contained herein is free from patent infringement. IEEE Standards documents are supplied “AS IS.”
The existence of an IEEE Standard does not imply that there are no o
ther ways to produ
ce, test, measure, purchase, market,
or provide other goods and services related to the scope of the IEEE Standard. Furthermore, the viewpoint expressed at the
time a standard is approved and issued is subject to change brought about through developments in the state of the art and
comments received from users of the standard. Every IEEE Standard is subjected to review at least every five years for
revision or reaffirmation. When a document is more than five years old and has not been reaffirmed, it is reasonable to
conclude that its contents, although still of some value, do not wholly reflect the present state of the art. Users are cautioned
to check to determine that they have the latest edition of any IEEE Standard.
In publishing and making this document available, the IEEE is not suggesting or rendering professional or other services
for, or o
n behalf of, any pe
rson or entity. Nor is the IEEE undertaking to perform any duty owed by any other person or
entity to another. Any person utilizing this, and any other IEEE Standards document, should rely upon his or her
independent judgement in the exercise of reasonable care in any given circumstances or, as appropriate, seek the advice of a
competent professional in determining the appropriateness of a given IEEE standard.
Interpretations: Occasionally questions may arise regarding the meaning of portions of standards as they relate to specific
ap
plications. When th
e need for interpretations is brought to the attention of IEEE, the Institute will initiate action to prepare
appropriate responses. Since IEEE Standards represent a consensus of concerned interests, it is important to ensure that any
interpretation has also received the concurrence of a balance of interests. For this reason, IEEE and the members of its
societies and Standards Coordinating Committees are not able to provide an instant response to interpretation requests
except in those cases where the matter has previously received formal consideration. A statement, written or oral, that is not
processed in accordance with the IEEE-SA Standards Board Operations Manual shall not be considered the official position
of IEEE or any of its committees and shall not be considered to be, nor be relied upon as, a formal interpretation of the
IEEE. At lectures, symposia, seminars, or educational courses, an individual presenting information on IEEE standards shall
make it clear that his or her views should be considered the personal views of that individual rather than the formal position,
explanation, or interpretation of the IEEE.
Comments for revision of IEEE Standards are welcome from any interested party, regardless of membership affiliation with
I
EEE. Suggestions for
changes in documents should be in the form of a proposed change of text, together with appropriate
supporting comments. Comments on standards and requests for interpretations should be submitted to the following
address:
Secretary, IEEE-SA Standards
Board
445 Hoes Lane
Piscat
away, NJ 08854
USA
Authorization to photocopy portions of any individual standard for internal or personal use is granted by The Institute of
Electrical and El
ectronics Engineers, Inc., provided that the appropriate fee is paid to Copyright Clearance Center. To
arrange for payment of licensing fee, please contact Copyright Clearance Center, Customer Service, 222 Rosewood Drive,
Danvers, MA 01923 USA; +1 978 750 8400. Permission to photocopy portions of any individual standard for educational
classroom use can also be obtained through the Copyright Clearance Center.