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FLEX Ethernet协议标准
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更新于2023-03-16
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FLEX Ethernet协议标准,OIF ABSTRACT: The Flex Ethernet (FlexE) Implementation Agreement provides a generic mechanism for supporting a variety of Ethernet MAC rates that may or may not correspond to any existing Ethernet PHY rate. This includes MAC rates that are both greater than (through bonding) and less than (through sub-rate and channelization) the Ethernet PHY rates used to carry FlexE. This can be viewed as a generalization of the Multi-Link Gearbox implementation agreements, removing the restrictions on the number of bonded PHYs (MLG2.0, for example, supports one or two 100GBASE-R PHYs) and the constraint that the FlexE clients correspond to Ethernet rates (MLG2.0 supports only 10G and 40G clients).
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www.oiforum.com 2
The OIF is an international non profit organization with over 90 member companies,
including the world’s leading carriers and vendors. Being an industry group uniting
representatives of the data and optical worlds, OIF’s purpose is to accelerate the deployment
of interoperable, cost-effective and robust optical internetworks and their associated
technologies. Optical internetworks are data networks composed of routers and data switches
interconnected by optical networking elements.
With the goal of promoting worldwide compatibility of optical internetworking products, the
OIF actively supports and extends the work of national and international standards bodies.
Working relationships or formal liaisons have been established with IEEE 802.1, IEEE 802.3,
IETF, IP-MPLS Forum, IPv6 Forum, ITU-T SG13, ITU-T SG15, MEF, ATIS-OPTXS,ATIS-
TMOC, TMF and the XFP MSA Group.
For additional information contact:
The Optical Internetworking Forum, 5177 Brandin Ct.,
Fremont, CA 94538
510-492-4040 info@oiforum.com
www.oiforum.com
IA OIF-FLEXE-01.1
www.oiforum.com 3
Working Group: Physical and Link Layer
TITLE: Flex Ethernet Implementation Agreement 1.1
SOURCE: TECHNICAL EDITOR WORKING GROUP CHAIR
Stephen J. Trowbridge, Ph. D. David R. Stauffer, Ph.D.
Nokia Kandou Bus, S.A.
5280 Centennial Trail EPFL Innovation Park Bldg. I
Boulder, CO 80303 USA 1015 Lausanne Switzerland
Phone: +1 972 477 8172 Phone: +1 802 316-0808
Email: steve.trowbridge@nokia.com Email: david@kandou.com
ABSTRACT: The Flex Ethernet (FlexE) Implementation Agreement provides a generic
mechanism for supporting a variety of Ethernet MAC rates that may or may not correspond to any
existing Ethernet PHY rate. This includes MAC rates that are both greater than (through bonding)
and less than (through sub-rate and channelization) the Ethernet PHY rates used to carry FlexE.
This can be viewed as a generalization of the Multi-Link Gearbox implementation agreements,
removing the restrictions on the number of bonded PHYs (MLG2.0, for example, supports one or
two 100GBASE-R PHYs) and the constraint that the FlexE clients correspond to Ethernet rates
(MLG2.0 supports only 10G and 40G clients).
Notice: This Technical Document has been created by the Optical Internetworking Forum (OIF). This document is
offered to the OIF Membership solely as a basis for agreement and is not a binding proposal on the companies listed as
resources above. The OIF reserves the rights to at any time to add, amend, or withdraw statements contained herein.
Nothing in this document is in any way binding on the OIF or any of its members.
The user's attention is called to the possibility that implementation of the OIF implementation agreement contained herein
may require the use of inventions covered by the patent rights held by third parties. By publication of this OIF
implementation agreement, the OIF makes no representation or warranty whatsoever, whether expressed or implied, that
implementation of the specification will not infringe any third party rights, nor does the OIF make any representation or
warranty whatsoever, whether expressed or implied, with respect to any claim that has been or may be asserted by any
third party, the validity of any patent rights related to any such claim, or the extent to which a license to use any such
rights may or may not be available or the terms hereof.
© 2017 Optical Internetworking Forum
This document and translations of it may be copied and furnished to others, and derivative works that comment on or
otherwise explain it or assist in its implementation may be prepared, copied, published and distributed, in whole or in
part, without restriction other than the following, (1) the above copyright notice and this paragraph must be included on
all such copies and derivative works, and (2) this document itself may not be modified in any way, such as by removing
the copyright notice or references to the OIF, except as needed for the purpose of developing OIF Implementation
Agreements.
By downloading, copying, or using this document in any manner, the user consents to the terms and conditions of this
notice. Unless the terms and conditions of this notice are breached by the user, the limited permissions granted above are
perpetual and will not be revoked by the OIF or its successors or assigns.
This document and the information contained herein is provided on an “AS IS” basis and THE OIF DISCLAIMS ALL
WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF
THE INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF
MERCHANTABILITY, TITLE OR FITNESS FOR A PARTICULAR PURPOSE.
IA OIF-FLEXE-01.1
Flex Ethernet 1.0 Implementation Agreement
www.oiforum.com 4
1 Table of Contents
1 Table of Contents ................................................................................................. 4
2 List of Figures ....................................................................................................... 5
3 List of Tables ........................................................................................................ 5
4 Document Revision History ................................................................................... 6
5 Introduction ........................................................................................................... 7
5.1 Requirements ................................................................................................ 7
5.2 Relationship to IEEE 802.3 Stack .................................................................. 8
5.3 Sample Applications .................................................................................... 11
6 General Mechanism ............................................................................................ 13
6.1 FlexE Group ................................................................................................ 13
6.2 FlexE Client ................................................................................................. 14
6.3 FlexE Calendar ............................................................................................ 14
6.4 FlexE Overhead and Alignment ................................................................... 15
7 Detailed Functions .............................................................................................. 18
7.1 FlexE Group Functions ................................................................................ 18
7.2 FlexE Client Generation ............................................................................... 18
7.3 FlexE Overhead Processing ........................................................................ 20
7.4 FlexE Mux Data Flow ................................................................................... 25
7.5 FlexE Demux Data Flow .............................................................................. 26
7.6 FlexE Group Configuration .......................................................................... 27
7.7 Energy Efficient Ethernet (EEE) ................................................................... 28
8 Transport Network Mappings for Flex Ethernet Signals ...................................... 28
8.1 FlexE Unaware Transport ............................................................................ 28
8.2 FlexE termination in the Transport ............................................................... 28
8.3 FlexE Aware Transport ................................................................................ 29
9 Appendix A: Test Vectors ................................................................................... 31
10 References...................................................................................................... 34
10.1 Normative references ............................................................................... 34
11 Appendix B: List of companies belonging to OIF when document was approved
35
IA OIF-FLEXE-01.1
Flex Ethernet 1.0 Implementation Agreement
www.oiforum.com 5
2 List of Figures
FIGURE 1: GENERAL STRUCTURE OF FLEXE ................................................................................... 7
FIGURE 2: FLEXE MUX FUNCTIONS ................................................................................................. 8
FIGURE 3: FLEXE DEMUX FUNCTIONS ........................................................................................... 10
FIGURE 4: ROUTER TO FLEXE UNAWARE TRANSPORT NETWORK CONNECTION .......................... 11
FIGURE 5: FLEXE TERMINATING TRANSPORT NETWORK EQUIPMENT ........................................... 12
FIGURE 6: EXAMPLE OF FLEXE AWARE TRANSPORT OF ETHERNET PHYS OF A FLEXE GROUP ... 13
FIGURE 7: ILLUSTRATION OF FLEXE CALENDAR DISTRIBUTION .................................................. 14
FIGURE 8: ILLUSTRATION OF INSERTION OF FLEXE OVERHEAD ON EACH PHY OF THE FLEXE
GROUP ................................................................................................................................... 15
FIGURE 9: ILLUSTRATION OF UNAVAILABLE CALENDAR SLOTS TO FACILITATE TRANSPORT AT
LOWER RATES ....................................................................................................................... 15
FIGURE 10: ENCODING OF ORDERED SET BLOCK FOR FLEXE OVERHEAD .................................... 16
FIGURE 11: FLEXE OVERHEAD FRAME AND MULTIFRAME .......................................................... 17
FIGURE 12: ETHERNET IDLE CONTROL BLOCK ............................................................................. 24
FIGURE 13: ILLUSTRATION OF DATA FLOW FOR FLEXE MUX ...................................................... 25
FIGURE 14: ETHERNET ERROR CONTROL BLOCK FORMAT ........................................................... 26
FIGURE 15: ILLUSTRATION OF FLEXE DEMUX DATA FLOW ......................................................... 26
FIGURE 16: ETHERNET LOCAL FAULT ORDERED SET ................................................................... 27
FIGURE 17: TEST VECTOR FOR FIRST BLOCK OF FLEXE OVERHEAD FRAME ................................. 31
FIGURE 18: TEST VECTOR FOR SECOND BLOCK OF FLEXE OVERHEAD FRAME ............................. 32
FIGURE 19: TEST VECTOR FOR THIRD BLOCK OF FLEXE OVERHEAD FRAME ................................ 33
3 List of Tables
TABLE 1: 64B/66B RATES GIVEN NUMBER OF AVAILABLE CALENDAR SLOTS ............................ 30
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