INTERNATIONAL TELECOMMUNICATION UNION
ITU-T
X.86/Y.1323
TELECOMMUNICATION
STANDARDIZATION SECTOR
OF ITU
(02/2001)
SERIES X: DATA NETWORKS AND OPEN SYSTEM
COMMUNICATIONS
Public data networks – Transmission, signalling and
switching
SERIES Y: GLOBAL INFORMATION INFRASTRUCTURE
AND INTERNET PROTOCOL ASPECTS
Internet protocol aspects – Transport
Ethernet over LAPS
ITU-T Recommendation X.86/Y.1323
ITU-T X-SERIES RECOMMENDATIONS
DATA NETWORKS AND OPEN SYSTEM COMMUNICATIONS
PUBLIC DATA NETWORKS
Services and facilities X.1–X.19
Interfaces X.20–X.49
Transmission, signalling and switching X.50–X.89
Network aspects X.90–X.149
Maintenance X.150–X.179
Administrative arrangements X.180–X.199
OPEN SYSTEMS INTERCONNECTION
Model and notation X.200–X.209
Service definitions X.210–X.219
Connection-mode protocol specifications X.220–X.229
Connectionless-mode protocol specifications X.230–X.239
PICS proformas X.240–X.259
Protocol Identification X.260–X.269
Security Protocols X.270–X.279
Layer Managed Objects X.280–X.289
Conformance testing X.290–X.299
INTERWORKING BETWEEN NETWORKS
General X.300–X.349
Satellite data transmission systems X.350–X.369
IP-based networks X.370–X.399
MESSAGE HANDLING SYSTEMS X.400–X.499
DIRECTORY X.500–X.599
OSI NETWORKING AND SYSTEM ASPECTS
Networking X.600–X.629
Efficiency X.630–X.639
Quality of service X.640–X.649
Naming, Addressing and Registration X.650–X.679
Abstract Syntax Notation One (ASN.1) X.680–X.699
OSI MANAGEMENT
Systems Management framework and architecture X.700–X.709
Management Communication Service and Protocol X.710–X.719
Structure of Management Information X.720–X.729
Management functions and ODMA functions X.730–X.799
SECURITY X.800–X.849
OSI APPLICATIONS
Commitment, Concurrency and Recovery X.850–X.859
Transaction processing X.860–X.879
Remote operations X.880–X.899
OPEN DISTRIBUTED PROCESSING X.900–X.999
For further details, please refer to the list of ITU-T Recommendations.
ITU-T Rec. X.86/Y.1323 (02/2001) i
ITU-T Recommendation X.86/Y.1323
Ethernet over LAPS
Summary
This Recommendation specifies how to operate Ethernet (defined by IEEE WG 802.3) over LAPS
(Link Access Procedure – SDH) and provides a simple technique to connect LANs and provides
Ethernet LAN extension over Wide Area Network (WAN) within a private and/or public network.
The characteristics of this technique include low latency variance, remote performance monitoring
capability, remote fault indication capability, active flow control in burst traffic condition and ease
of use and maintenance, especially in the area of SDH transmission.
Source
ITU-T Recommendation X.86/Y.1323 was prepared by ITU-T Study Group 7 (2001-2004) and
approved under the WTSA Resolution 1 procedure on 2 February 2001.
ii ITU-T Rec. X.86/Y.1323 (02/2001)
FOREWORD
The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of
telecommunications. The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of
ITU. ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations
on them with a view to standardizing telecommunications on a worldwide basis.
The World Telecommunication Standardization Assembly (WTSA), which meets every four years,
establishes the topics for study by the ITU-T study groups which, in turn, produce Recommendations on these
topics.
The approval of ITU-T Recommendations is covered by the procedure laid down in WTSA Resolution 1.
In some areas of information technology which fall within ITU-T's purview, the necessary standards are
prepared on a collaborative basis with ISO and IEC.
NOTE
In this Recommendation, the expression "Administration" is used for conciseness to indicate both a
telecommunication administration and a recognized operating agency.
INTELLECTUAL PROPERTY RIGHTS
ITU draws attention to the possibility that the practice or implementation of this Recommendation may
involve the use of a claimed Intellectual Property Right. ITU takes no position concerning the evidence,
validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others
outside of the Recommendation development process.
As of the date of approval of this Recommendation, ITU had not received notice of intellectual property,
protected by patents, which may be required to implement this Recommendation. However, implementors are
cautioned that this may not represent the latest information and are therefore strongly urged to consult the
TSB patent database.
ITU 2002
All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from ITU.
ITU-T Rec. X.86/Y.1323 (02/2001) iii
CONTENTS
Page
1 Scope .......................................................................................................................... 1
2 References .................................................................................................................. 2
2.1 Normative references.................................................................................................. 2
2.1.1 ITU-T Recommendations.............................................................................. 2
2.1.2 ISO/IEC Standards ........................................................................................ 2
3 Definitions .................................................................................................................. 2
4 Abbreviations ............................................................................................................. 3
4.1 Abbreviations specified in ISO/IEC 2382-25............................................................. 3
4.2 Abbreviations specified in ITU-T G.707/Y.1322....................................................... 3
4.3 Abbreviations specified in ITU-T Q.921.................................................................... 3
4.4 Abbreviations specified in this Recommendation...................................................... 3
5 The protocol framework of Ethernet over LAPS ....................................................... 3
6 The SDH physical layers ............................................................................................ 5
7 Service facilities and protocol specifications of LAPS .............................................. 6
8 Encapsulation ............................................................................................................. 6
9 Functional elements of Gigabit Ethernet over LAPS ................................................. 8
10 Rate adaptation ........................................................................................................... 8
Appendix I − An example of data processing.......................................................................... 9
I.1 The LAPS transmit processing................................................................................... 9
I.2 The LAPS receive processing .................................................................................... 10
I.3 Erroneous frame handling .......................................................................................... 10
Appendix II − The possible application area of this technology ............................................. 11
