ISO/IEC/IEEE 8802-1Q:2016/Amd 4:2017

Information technology — Telecommunications and information exchange between systems — Local and metropolitan area networks — Specific requirements — Part 1Q: Bridges and bridged networks — Amendment 4: Frame preemption

Technologies de l'information — Télécommunications et échange d'information entre systèmes — Réseaux locaux et métropolitains — Exigences spécifiques — Partie 1Q: Ponts et réseaux pontés — Amendement 4: Préemption de trame

General Information

• Status: Withdrawn
• Publication Date: 28-Nov-2017
• Withdrawal Date: 28-Nov-2017
• ICS: 35.110 - Networking
• Technical Committee: ISO/IEC JTC 1/SC 6 - Telecommunications and information exchange between systems
• Drafting Committee: ISO/IEC JTC 1/SC 6 - Telecommunications and information exchange between systems
• Current Stage: 9599 - Withdrawal of International Standard
• Completion Date: 21-Aug-2020

Relations

• Revised: ISO/IEC/IEEE 8802-1Q:2020 - Telecommunications and exchange between information technology systems — Requirements for local and metropolitan area networks — Part 1Q: Bridges and bridged networks
• Effective Date: 23-Apr-2020
• Amends: ISO/IEC/IEEE 8802-1Q:2016 - Information technology — Telecommunications and information exchange between systems — Local and metropolitan area networks — Specific requirements — Part 1Q: Bridges and bridged networks
• Effective Date: 01-Jan-2022

Standards Content (Sample)

INTERNATIONAL ISO/IEC/
STANDARD IEEE
8802-1Q
First edition
2016-03-15
AMENDMENT 4
2017-11
Information technology —
Telecommunications and information
exchange between systems — Local
and metropolitan area networks —
Specific requirements —
Part 1Q:
Bridges and bridged networks
AMENDMENT 4: Frame preemption
Technologies de l'information — Télécommunications et échange
d'information entre systèmes — Réseaux locaux et métropolitains —
Exigences spécifiques —
Partie 1Q: Ponts et réseaux pontés
AMENDEMENT 4: Préemption de trame
Reference number
ISO/IEC/IEEE 8802-1Q:2016/Amd.4:2017(E)
©
 IEEE 2016

---------------------- Page: 1 ----------------------
ISO/IEC/IEEE 8802-1Q:2016/Amd.4:2017(E)

COPYRIGHT PROTECTED DOCUMENT
© IEEE 2016
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO or IEEE at the address below or ISO’s member body in the
country of the requester.
ISO copyright office Institute of Electrical and Electronics Engineers, Inc
Ch. de Blandonnet 8 • CP 401 3 Park Avenue, New York
CH-1214 Vernier, Geneva, Switzerland NY 10016-5997, USA
Tel. [phone]
Fax [phone]
[e-mail] [e-mail]
www.iso.org www.ieee.org
ii © IEEE 2016 – All rights reserved

---------------------- Page: 2 ----------------------
ISO/IEC/IEEE 8802-1Q:2016/Amd.4:2017(E)
Foreword
ISO (the International Organization for Standardization) and IEC (the International Electrotechnical
Commission) form the specialized system for worldwide standardization. National bodies that are
members of ISO or IEC participate in the development of International Standards through technical
committees established by the respective organization to deal with particular fields of technical activity.
ISO and IEC technical committees collaborate in fields of mutual interest. Other international
organizations, governmental and non-governmental, in liaison with ISO and IEC, also take part in the work.
In the field of information technology, ISO and IEC have established a joint technical committee,
ISO/IEC JTC 1.
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 contained in its standards.
The main task of ISO/IEC JTC 1 is to prepare International Standards. Draft International Standards
adopted by the joint technical committee are circulated to national bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the national bodies casting a vote.
Attention is called to the possibility that implementation of this standard may require the use of subject
matter covered by patent rights. By publication of this standard, no position is taken with respect to the
existence or validity of any patent rights in connection therewith. ISO/IEEE is not responsible for
identifying essential patents or patent claims for which a license may be required, for conducting inquiries
into the legal validity or scope of patents or patent claims or determining whether any licensing terms or
conditions provided in connection with submission of a Letter of Assurance or a Patent Statement and
Licensing Declaration Form, if any, or in any licensing agreements are reasonable or non-discriminatory.
Users of this standard are expressly advised that determination of the validity of any patent rights, and the
risk of infringement of such rights, is entirely their own responsibility. Further information may be obtained
from ISO or the IEEE Standards Association.
ISO/IEC/IEEE 8802-1Q:2016/Amd.4 was prepared by the LAN/MAN of the IEEE Computer Society
(as IEEE STD 802.1Qb-2014). It was adopted by Joint Technical Committee ISO/IEC JTC 1,
Information technology, Subcommittee SC 6, Telecommunications and information exchange between
systems, in parallel with its approval by the ISO/IEC national bodies, under the “fast-track procedure”
defined in the Partner Standards Development Organization cooperation agreement between ISO and
IEEE. IEEE is responsible for the maintenance of this document with participation and input from
ISO/IEC national bodies.
© IEEE 2016 – All rights reserved iii

---------------------- Page: 3 ----------------------
IEEE Std 802.1Qbu™-2016
(Amendment to
IEEE Std 802.1Q™-2014)
IEEE Standard for
Local and metropolitan area networks—
Bridges and Bridged Networks—
Amendment 26: Frame Preemption
Sponsor
LAN/MAN Standards Committee
of the
IEEE Computer Society
Approved 30 June 2016
IEEE-SA Standards Board

---------------------- Page: 4 ----------------------
ISO/IEC/IEEE 8802-1Q:2016/Amd.4:2017(E)
Abstract: Enhancements to the forwarding process that support frame preemption are provided in
this amendment to IEEE Std 802.1Q-2014.
Keywords: Bridged Local Area Networks, IEEE 802.1Q™, LANs, local area networks, MAC
Bridges, metropolitan area networks, preemption, Virtual Bridged Local Area Networks, virtual
LANs
The Institute of Electrical and Electronics Engineers, Inc.
3 Park Avenue, New York, NY 10016-5997, USA
Copyright © 2016 by the Institute of Electrical and Electronics Engineers, Inc.
All rights reserved. Published 30 August 2016. 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 Electrical and
Electronics Engineers, Incorporated.
PDF: ISBN 978-1-5044-2257-4 STD21074
Print: ISBN 978-1-5044-2258-1 STDPD21074
IEEE prohibits discrimination, harassment, and bullying. For more information, visit http://www.ieee.org/web/aboutus/
whatis/policies/p9-26.html.
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.
2
Copyright © 2016 IEEE. All rights reserved.
© IEEE 2016 – All rights reserved

---------------------- Page: 5 ----------------------
ISO/IEC/IEEE 8802-1Q:2016/Amd.4:2017(E)
IEEE Std 802.1Qbu-2016
IEEE Standard for Local and Metropolitan Area Networks—Bridges and Bridged Networks—
Amendment 26: Frame Preemption
Important Notices and Disclaimers Concerning IEEE Standards Documents
IEEE documents are made available for use subject to important notices and legal disclaimers. These notices
and disclaimers, or a reference to this page, appear in all standards and may be found under the heading
“Important Notice” or “Important Notices and Disclaimers Concerning IEEE Standards Documents.”
Notice and Disclaimer of Liability Concerning the Use of IEEE Standards
Documents
IEEE Standards documents (standards, recommended practices, and guides), both full-use and trial-use, are
developed within IEEE Societies and the Standards Coordinating Committees of the IEEE Standards
Association (“IEEE-SA”) Standards Board. IEEE (“the Institute”) develops its standards through a
consensus development process, approved by the American National Standards Institute (“ANSI”), which
brings together volunteers representing varied viewpoints and interests to achieve the final product.
Volunteers are not necessarily members of the Institute and participate without compensation from IEEE.
While IEEE administers the process and establishes rules to promote fairness in the consensus development
process, 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.
IEEE does not warrant or represent the accuracy or content of the material contained in its standards, and
expressly disclaims all warranties (express, implied and statutory) not included in this or any other
document relating to the standard, including, but not limited to, the warranties of: merchantability; fitness
for a particular purpose; non-infringement; and quality, accuracy, effectiveness, currency, or completeness
of material. In addition, IEEE disclaims any and all conditions relating to: results; and workmanlike effort.
IEEE standards documents are supplied “AS IS” and “WITH ALL FAULTS.”
Use of an IEEE standard is wholly voluntary. The existence of an IEEE standard does not imply that there
are no other ways to produce, 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.
In publishing and making its standards available, IEEE is not suggesting or rendering professional or other
services for, or on behalf of, any person or entity nor is IEEE undertaking to perform any duty owed by any
other person or entity to another. Any person utilizing any IEEE Standards document, should rely upon his
or her own independent judgment 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.
IN NO EVENT SHALL IEEE BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO:
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
OTHERWISE) ARISING IN ANY WAY OUT OF THE PUBLICATION, USE OF, OR RELIANCE
UPON ANY STANDARD, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE AND
REGARDLESS OF WHETHER SUCH DAMAGE WAS FORESEEABLE.
3
Copyright © 2016 IEEE. All rights reserved.
© IEEE 2016 – All rights reserved

---------------------- Page: 6 ----------------------
ISO/IEC/IEEE 8802-1Q:2016/Amd.4:2017(E)
IEEE Std 802.1Qbu-2016
IEEE Standard for Local and Metropolitan Area Networks—Bridges and Bridged Networks—
Amendment 26: Frame Preemption
Translations
The IEEE consensus development process involves the review of documents in English only. In the event
that an IEEE standard is translated, only the English version published by IEEE should be considered the
approved IEEE standard.
Official statements
A statement, written or oral, that is not processed in accordance with the IEEE-SA Standards Board
Operations Manual shall not be considered or inferred to be the official position of IEEE or any of its
committees and shall not be considered to be, or be relied upon as, a formal position of 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 of IEEE.
Comments on standards
Comments for revision of IEEE Standards documents are welcome from any interested party, regardless of
membership affiliation with IEEE. However, IEEE does not provide consulting information or advice
pertaining to IEEE Standards documents. Suggestions for changes in documents should be in the form of a
proposed change of text, together with appropriate supporting comments. Since IEEE standards represent a
consensus of concerned interests, it is important that any responses to comments and questions also receive
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 comments or questions
except in those cases where the matter has previously been addressed. For the same reason, IEEE does not
respond to interpretation requests. Any person who would like to participate in revisions to an IEEE
standard is welcome to join the relevant IEEE working group.
Comments on standards should be submitted to the following address:
Secretary, IEEE-SA Standards Board
445 Hoes Lane
Piscataway, NJ 08854 USA
Laws and regulations
Users of IEEE Standards documents should consult all applicable laws and regulations. Compliance with the
provisions of any IEEE Standards document does not imply compliance to any applicable regulatory
requirements. Implementers of the standard are responsible for observing or referring to the applicable
regulatory requirements. IEEE does not, by the publication of its standards, intend to urge action that is not
in compliance with applicable laws, and these documents may not be construed as doing so.
Copyrights
IEEE draft and approved standards are copyrighted by IEEE under U.S. and international copyright laws.
They are made available by IEEE and are adopted for a wide variety of both public and private uses. These
include both use, by reference, in laws and regulations, and use in private self-regulation, standardization,
and the promotion of engineering practices and methods. By making these documents available for use and
adoption by public authorities and private users, IEEE does not waive any rights in copyright to the
documents.
4
Copyright © 2016 IEEE. All rights reserved.
© IEEE 2016 – All rights reserved

---------------------- Page: 7 ----------------------
ISO/IEC/IEEE 8802-1Q:2016/Amd.4:2017(E)
IEEE Std 802.1Qbu-2016
IEEE Standard for Local and Metropolitan Area Networks—Bridges and Bridged Networks—
Amendment 26: Frame Preemption
Photocopies
Subject to payment of the appropriate fee, IEEE will grant users a limited, non-exclusive license to
photocopy portions of any individual standard for company or organizational internal use or individual, non-
commercial use only. To arrange for payment of licensing fees, please contact Copyright Clearance Center,
Customer Service, 222 Rosewood Drive, Danvers, MA 01923 USA; [phone]. Permission to
photocopy portions of any individual standard for educational classroom use can also be obtained through
the Copyright Clearance Center.
Updating of IEEE Standards documents
Users of IEEE Standards documents should be aware that these documents may be superseded at any time
by the issuance of new editions or may be amended from time to time through the issuance of amendments,
corrigenda, or errata. An official IEEE document at any point in time consists of the current edition of the
document together with any amendments, corrigenda, or errata then in effect.
Every IEEE standard is subjected to review at least every ten years. When a document is more than ten years
old and has not undergone a revision process, 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 order to determine whether a given document is the current edition and whether it has been amended
through the issuance of amendments, corrigenda, or errata, visit the IEEE-SA Website at http://
ieeexplore.ieee.org/browse/standards/collection/ieee or contact IEEE at the address listed previously. For
more information about the IEEE SA or IEEE’s standards development process, visit the IEEE-SA Website
at http://standards.ieee.org.
Errata
Errata, if any, for all IEEE standards can be accessed on the IEEE-SA Website at the following URL: http://
standards.ieee.org/findstds/errata/index.html. Users are encouraged to check this URL for errata
periodically.
Patents
Attention is called to the possibility that implementation of this standard may require use of subject matter
covered by patent rights. By publication of this standard, no position is taken by the IEEE with respect to the
existence or validity of any patent rights in connection therewith. If a patent holder or patent applicant has
filed a statement of assurance via an Accepted Letter of Assurance, then the statement is listed on the IEEE-
SA Website at http://standards.ieee.org/about/sasb/patcom/patents.html. Letters of Assurance may indicate
whether the Submitter is willing or unwilling to grant licenses under patent rights without compensation or
under reasonable rates, with reasonable terms and conditions that are demonstrably free of any unfair
discrimination to applicants desiring to obtain such licenses.
Essential Patent Claims may exist for which a Letter of Assurance has not been received. The IEEE is not
responsible for identifying Essential Patent Claims for which a license may be required, for conducting
inquiries into the legal validity or scope of Patents Claims, or determining whether any licensing terms or
conditions provided in connection with submission of a Letter of Assurance, if any, or in any licensing
agreements are reasonable or non-discriminatory. Users of this standard are expressly advised that
determination of the validity of any patent rights, and the risk of infringement of such rights, is entirely their
own responsibility. Further information may be obtained from the IEEE Standards Association.
5
Copyright © 2016 IEEE. All rights reserved.
© IEEE 2016 – All rights reserved

---------------------- Page: 8 ----------------------
ISO/IEC/IEEE 8802-1Q:2016/Amd.4:2017(E)
IEEE Std 802.1Qbu-2016
IEEE Standard for Local and Metropolitan Area Networks—Bridges and Bridged Networks—
Amendment 26: Frame Preemption
Participants
At the time this standard was completed, the IEEE 802.1 working group had the following membership:
Glenn Parsons, Chair
John Messenger, Vice-Chair
Michael Johas Teener, Chair, Time Sensitive Networking Task Group
Tony Jeffree, Editor
Christian Boiger Stephan Kehrer Jessy Rouyer
Marcel Kiessling
Paul Bottorff Panagiotis Saltsidis
David Chen Philippe Klein Michael Seaman
Feng Chen Jouni Korhonen Daniel Sexton
Weiying Cheng Yizhou Li Johannes Specht
Rodney Cummings Christophe Mangin Wilfried Steiner
Janos Farkas Tom McBeath Patricia Thaler
Norman Finn James McIntosh David Thornburg
Geoffrey Garner Hiroki Nakano Jeremy Touve
Eric Gray Bob Noseworthy Paul Unbehagen
Craig Gunther Donald R. Pannell Karl Weber
Stephen Haddock Walter Pienciak Brian Weis
Karen Randall Jordon Woods
Mark Hantel
Marc Holness Maximilian Riegel Helge Zinner
Hal Keen Dan Romascanu Juan Carlos Zuniga
The following members of the individual balloting committee voted on this standard. Balloters may have
voted for approval, disapproval, or abstention.
Michael Johas Teener
Thomas Alexander Dan Romascanu
Adri Jovin
Butch Anton Jessy Rouyer
Shinkyo Kaku Larry Samberg
Lee Armstrong
Stefan Aust Piotr Karocki Bartien Sayogo
Christian Boiger Stuart Kerry Michael Seaman
Nancy Bravin Yongbum Kim David Solomon
William Byrd Robert Landman Kevin Stanton
Juan Carreon Mark Laubach Thomas Starai
Rodney Cummings David Lewis Eugene Stoudenmire
Janos Farkas Arthur H. Light Walter Struppler
Yukihiro Fujimoto William Lumpkins Michael Swearingen
David Gregson Michael Lynch Patricia Thaler
Randall Groves Elvis Maculuba Mark-Rene Uchida
Stephen Haddock Arthur Marris Lorenzo Vangelista
Marek Hajduczenia Jonathon Mclendon Dmitri Varsanofiev
Jerome Henry Richard Mellitz George Vlantis
Khurram Waheed
Marco Hernandez Charles Moorwood
Guido Hiertz Michael Newman Stephen Webb
Werner Hoelzl Nick S.A. Nikjoo Karl Weber
C. Huntley Satoshi Obara Hung-Yu Wei
Noriyuki Ikeuchi Alon Regev Natalie Wienckowski
Atsushi Ito Robert Robinson Oren Yuen
Tony Jeffree Benjamin Rolfe Zhen Zhou
6
Copyright © 2016 IEEE. All rights reserved.
© IEEE 2016 – All rights reserved

---------------------- Page: 9 ----------------------
ISO/IEC/IEEE 8802-1Q:2016/Amd.4:2017(E)
IEEE Std 802.1Qbu-2016
IEEE Standard for Local and Metropolitan Area Networks—Bridges and Bridged Networks—
Amendment 26: Frame Preemption
When the IEEE-SA Standards Board approved this standard on 30 June 2016, it had the following
membership:
Jean-Philippe Faure, Chair
Ted Burse, Vice-Chair
John D. Kulick, Past Chair
Konstantinos Karachalios, Secretary
Chuck Adams
Ronald W. Hotchkiss Mehmet Ulema
Masayuki Ariyoshi Michael Janezic Yingli Wen
Stephen Dukes Joseph L. Koepfinger* Howard Wolfman
Don Wright
Jianbin Fan Hung Ling
J. Travis Griffith Kevin Lu Yu Yuan
Annette D. Reilly Daidi Zhong
Gary Hoffman
Gary Robinson
*Member Emeritus
7
Copyright © 2016 IEEE. All rights reserved.
© IEEE 2016 – All rights reserved

---------------------- Page: 10 ----------------------
ISO/IEC/IEEE 8802-1Q:2016/Amd.4:2017(E)
IEEE Std 802.1Qbu-2016
IEEE Standard for Local and Metropolitan Area Networks—Bridges and Bridged Networks—
Amendment 26: Frame Preemption
Introduction
This introduction is not part of IEEE Std 802.1Qbu-2016, IEEE Standard for Local and metropolitan area networks—
Media Access Control (MAC) Bridges and Virtual Bridged Local Area Networks—Amendment 26: Frame Preemption.
This amendment to IEEE Std 802.1Q-2014 provides enhancements to the forwarding process that support
frame preemption.
This standard contains state-of-the-art material. The area covered by this standard is undergoing evolution.
Revisions are anticipated within the next few years to clarify existing material, to correct possible errors, and
to incorporate new related material. Information on the current revision state of this and other IEEE 802
standards may be obtained from
Secretary, IEEE-SA Standards Board
445 Hoes Lane
Piscataway, NJ 08854
USA
8
Copyright © 2016 IEEE. All rights reserved.
© IEEE 2016 – All rights reserved

---------------------- Page: 11 ----------------------
ISO/IEC/IEEE 8802-1Q:2016/Amd.4:2017(E)
IEEE Std 802.1Qbu-2016
IEEE Standard for Local and Metropolitan Area Networks—Bridges and Bridged Networks—
Amendment 26: Frame Preemption
Contents
2. Normative references. 13
3. Definitions . 14
4. Abbreviations. 15
5. Conformance. 16
5.4 VLAN Bridge component requirements. 16
5.13 MAC Bridge component requirements. 16
5.26 End station requirements—enhancements for frame preemption. 16
6. Support of the MAC Service . 17
6.7 Support of the Internal Sublayer Service by specific MAC procedures. 17
8. Principles of bridge operation. 18
8.6 The Forwarding Process . 18
12. Bridge management . 20
12.30 Managed objects for frame preemption . 20
17. Management Information Base (MIB) . 22
17.2 Structure of the MIB . 22
17.3 Relationship to other MIBs. 22
17.4 Security considerations . 23
17.7 MIB modules . 23
Annex A (normative) PICS proforma—Bridge implementations . 43
A.5 Major capabilities . 43
A.14 Bridge management . 43
A.24 Management Information Base (MIB) . 43
A.44 Frame preemption . 44
Annex B (normative) PICS proforma—End station implementations . 45
B.5 Major capabilities . 45
B.15 Scheduled traffic . 45
Annex Q (informative) Preemption and IEEE Std 802.1AE MAC Security. 46
Annex R (informative) Preemption and scheduled traffic. 48
R.1 Scheduling used in isolation . 48
R.2 Preemption used in isolation. 48
R.3 Scheduling and preemption used in combination, no HOLD/RELEASE . 49
R.4 Scheduling and preemption used in combination, with HOLD/RELEASE . 49
R.5 Bandwidth allocation and express traffic. 50
Annex S (informative) Bibliography . 51
9
Copyright © 2016 IEEE. All rights reserved.
© IEEE 2016 – All rights reserved

---------------------- Page: 12 ----------------------
ISO/IEC/IEEE 8802-1Q:2016/Amd.4:2017(E)
IEEE Std 802.1Qbu-2016
IEEE Standard for Local and Metropolitan Area Networks—Bridges and Bridged Networks—
Amendment 26: Frame Preemption
Tables
Table 8-6 Gate operations . 19
Table 12-29 Frame Preemption Parameter Ttable . 20
Table 17-29 IEEE8021-Preemption-MIB Structure and relationship to this standard . 22
11
Copyright © 2016 IEEE. All rights reserved.
© IEEE 2016 – All rights reserved

---------------------- Page: 13 ----------------------
ISO/IEC/IEEE 8802-1Q:2016/Amd.4:2017(E)
IEEE Std 802.1Qbu-2016
IEEE Standard for Local and Metropolitan Area Networks—Bridges and Bridged Networks—
Amendment 26: Frame Preemption
IEEE Standard for
Local and metropolitan area networks—
Bridges and Bridged Networks—
Amendment 26: Frame Preemption
(This amendment is based on IEEE Std 802.1Q™-2014 as amended by IEEE Std 802.1Qbv-2015.)
NOTE—The editing instructions contained in this amendment define how to merge the material contained here into the
base document and its other amendments to form the new comprehensive standard.
Editing instructions are shown in bold italic. Four editing instructions are used: change, delete, insert, and replace.
Change is used to make corrections in existing text or tables. The editing instruction specifies the location of the change
and describes what is being changed either by using strikethrough (to remove old material) and underscore (to add new
material). Delete removes existing material. Insert adds new material without disturbing the existing material. Insertions
may require renumbering. If so, renumbering instructions are given in the editing instruction. Replace is used to make
changes in figures or equations by removing the existing figure or equation and replacing it with a new one. Editing
instructions, change markings, and this NOTE will not be carried over into future editions because the changes will be
1
incorporated into the base standard.
IMPORTANT NOTICE: IEEE Standards documents are not intended to ensure safety, health, or environmental pro-
tection, or ensure against interference with or from other devices or networks. Implementers of IEEE Standards doc-
uments are responsible for determining and complying with all appropriate safety, security, environmental, health,
and interference protection practices and all applicable laws and regulations.
This IEEE document is made available for use subject to important notices and legal disclaimers. These notices and
disclaimers appear in all publications containing this document and may be found under the heading “Important
Notice” or “Impor
...