1 IEEE P802.1AX-REV™/D4.54 2 October 15, 2014 3 4 5 6 IEEE P802.1AX-REV™/D4.54 7 8 9 Draft Standard for 10 Local and Metropolitan Area Networks — 11 12 13 Link Aggregation 14 Sponsor 15 16 LAN MAN Standards Committee 17 of the 18 IEEE Computer Society 19 20 Prepared by the Interworking Task Group of IEEE 802.1 21 22 23 Abstract: Link Aggregation allows parallel full duplex point-to-point links to be used as if they were 24 a single link, and also supports the use of multiple links as a resilient load sharing interconnect 25 between multiple nodes in two separately administered networks. This standard defines a MAC 26 independent Link Aggregation capability, and general information relevant to specific to MAC types. 27 Keywords: Aggregated Link, Aggregator, Link Aggregation, Link Aggregation Group, local area 28 network, management, interconnect, Network-Network Interface, NNI, Distributed Resilient 29 Network Interconnect, DRNI. 30 31 32 33 34 35 36 37 38 39 40 41 Copyright © 2014 by the Institute of Electrical and Electronics Engineers, Inc. 42 345 East 47th Street 43 New York, NY 10017, USA 44 All rights reserved. 45 All rights reserved.This document is an unapproved draft of a proposed IEEE Standard. As such, this document is subject 46 to change. USE AT YOUR OWN RISK! Because this is an unapproved draft, this document must not be utilized for any 47 conformance/compliance purposes. Permission is hereby granted for IEEE Standards Committee participants to reproduce this document for purposes of IEEE standardization activities only. Prior to submitting this document to another standards 48 development organization for standardization activities, permission must first be obtained from the Manager, Standards 49 Licensing and Contracts, IEEE Standards Activities Department. Other entities seeking permission to reproduce this 50 document, in whole or in part, must obtain permission from the Manager, Standards Licensing and Contracts, IEEE Standards Activities Department. 51 52 IEEE Standards Department 53 Copyright and Permissions 445 Hoes Lane, P.O. Box 1331 54 Piscataway, NJ 08855-1331, USA Standard for: Link Aggregation IEEE P802.1AX-REV™/D4.54 October 15, 2014 1 Introduction to IEEE P802.1AX-REV™ 2 3 4 This introduction is not part of IEEE Project 802.1AX-REV, IEEE Standards for Local and 5 Metropolitan Area Networks—Link Aggregation 6 7 8 This standard contains state-of-the-art material. The area covered by this standard is undergoing evolution. 9 Revisions are anticipated within the next few years to clarify existing material, to correct possible errors, and 10 to incorporate new related material. Information on the current revision state of this and other IEEE 802 11 standards can be obtained from 12 13 Secretary, IEEE-SA Standards Board 14 445 Hoes Lane 15 P.O. Box 1331 16 Piscataway, NJ 08855-1331 17 USA 18 19 20 Notice to Users 21 22 Laws and regulations 23 24 Users of these documents should consult all applicable laws and regulations. Compliance with the 25 provisions of this standard does not imply compliance to any applicable regulatory requirements. 26 Implementers of the standard are responsible for observing or referring to the applicable regulatory 27 requirements. 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Standard for: Link Aggregation IEEE P802.1AX-REV™/D4.54 October 15, 2014 1 Errata 2 3 Errata, if any, for this and all other standards can be accessed at the following URL: http:// 4 standards.ieee.org/reading/ieee/updates/errata/index.html. Users are encouraged to check this URL for errata 5 periodically. 6 7 Interpretations 8 9 Current interpretations can be accessed at the following URL: http://standards.ieee.org/reading/ieee/interp/ 10 index.html. 11 12 Patents 13 14 Attention is called to the possibility that implementation of this amendment may require use of subject 15 matter covered by patent rights. By publication of this amendment, no position is taken with respect to the 16 existence or validity of any patent rights in connection therewith. The IEEE is not responsible for identifying 17 Essential Patent Claims for which a license may be required, for conducting inquiries into the legal validity 18 or scope of Patents Claims or determining whether any licensing terms or conditions provided in connection 19 with submission of a Letter of Assurance, if any, or in any licensing agreements are reasonable or 20 nondiscriminatory. 21 22 Users of this amendment are expressly advised that determination of the validity of any patent rights, and the 23 risk of infringement of such rights, is entirely their own responsibility. Further information may be obtained 24 from the IEEE Standards Association. 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 Copyright © 2014 IEEE. All rights reserved. 3 This is an unapproved IEEE Standards Draft, subject to change. Standard for: Link Aggregation IEEE P802.1AX-REV™/D4.54 October 15, 2014 1 Contents 2 3 1. Overview ........................................................................................................................................... 13 4 1.1 Scope ..................................................................................................................................... 13 5 1.2 Purpose .................................................................................................................................. 13 6 1.3 State diagram conventions .................................................................................................... 13 7 8 2. Normative references ........................................................................................................................ 14 9 10 3. Definitions ......................................................................................................................................... 15 11 12 4. Abbreviations .................................................................................................................................... 18 13 14 5.1 Requirements Terminology .................................................................................................. 19 15 5.2 Protocol Implementation Conformance Statement (PICS) ................................................... 19 16 5.3 Link Aggregation requirements ............................................................................................ 19 17 5.3.1 Link Aggregation options .....................................................................................................19 18 5.4 Distributed Resilient Network Interconnect requirements ................................................... 20 19 5.4.1 Distribution Resilient Network Interconnect options ...........................................................20 20 21 6. Link Aggregation .............................................................................................................................. 22 22 6.1 Overview ............................................................................................................................... 22 23 6.1.1 Goals and objectives .............................................................................................................22 24 6.1.2 Positioning of Link Aggregation within the IEEE 802 architecture ....................................23 25 6.1.3 LLDP Parser/Multiplexer .....................................................................................................24 26 6.1.3.1 LLDP Parser state diagram .....................................................................................24 27 6.1.3.1.1 LLDP Parser Function .............................................................................24 28 6.1.3.1.2 Constants ..................................................................................................24 29 6.1.3.1.3 Variables ..................................................................................................25