ITU-T G 8011-2015 Ethernet service characteristics (Study Group 15)《以太网服务特性(研究组15)》.pdf

1、 I n t e r n a t i o n a l T e l e c o m m u n i c a t i o n U n i o n ITU-T G.8011/Y.1307 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (01/2015) SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS Packet over Transport aspects Ethernet over Transport aspects SERIES Y: GLOBAL I

2、NFORMATION INFRASTRUCTURE, INTERNET PROTOCOL ASPECTS AND NEXT-GENERATION NETWORKS Internet protocol aspects Transport Ethernet service characteristics Recommendation ITU-T G.8011/Y.1307 ITU-T G-SERIES RECOMMENDATIONS TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS INTERNATIONAL TELEPHON

3、E CONNECTIONS AND CIRCUITS G.100G.199 GENERAL CHARACTERISTICS COMMON TO ALL ANALOGUE CARRIER-TRANSMISSION SYSTEMS G.200G.299 INDIVIDUAL CHARACTERISTICS OF INTERNATIONAL CARRIER TELEPHONE SYSTEMS ON METALLIC LINES G.300G.399 GENERAL CHARACTERISTICS OF INTERNATIONAL CARRIER TELEPHONE SYSTEMS ON RADIO-

4、RELAY OR SATELLITE LINKS AND INTERCONNECTION WITH METALLIC LINES G.400G.449 COORDINATION OF RADIOTELEPHONY AND LINE TELEPHONY G.450G.499 TRANSMISSION MEDIA AND OPTICAL SYSTEMS CHARACTERISTICS G.600G.699 DIGITAL TERMINAL EQUIPMENTS G.700G.799 DIGITAL NETWORKS G.800G.899 DIGITAL SECTIONS AND DIGITAL L

5、INE SYSTEM G.900G.999 MULTIMEDIA QUALITY OF SERVICE AND PERFORMANCE GENERIC AND USER-RELATED ASPECTS G.1000G.1999 TRANSMISSION MEDIA CHARACTERISTICS G.6000G.6999 DATA OVER TRANSPORT GENERIC ASPECTS G.7000G.7999 PACKET OVER TRANSPORT ASPECTS G.8000G.8999 Ethernet over Transport aspects G.8000G.8099 M

6、PLS over Transport aspects G.8100G.8199 Synchronization, quality and availability targets G.8200G.8299 Service Management G.8600G.8699 ACCESS NETWORKS G.9000G.9999 For further details, please refer to the list of ITU-T Recommendations. Rec. ITU-T G.8011/Y.1307 (01/2015) i Recommendation ITU-T G.8011

7、/Y.1307 Ethernet service characteristics Summary Recommendation ITU-T G.8011/Y.1307 describes a framework for defining network-oriented characteristics of Ethernet services based on Metro Ethernet Forum (MEF) specifications. The framework is supported by the modelling of Ethernet layer networks desc

8、ribed in ITU-T and MEF. The service definition, service attributes and operation, administration and maintenance (OAM) introduced in this framework are used to create numerous specific Ethernet services. This Recommendation supersedes Recommendations ITU-T G.8011.1/Y.1307.1 (2013), ITU-T G.8011.2/Y.

9、1307.2 (2013), ITU-T G.8011.3/Y.1307.3 (2013), ITU-T G.8011.4/Y.1307.4 (2013) and ITU-T G.8011.5/Y.1307.5 (2013). History Edition Recommendation Approval Study Group Unique ID* 1.0 ITU-T G.8011/Y.1307 2004-08-22 15 11.1002/1000/7358 1.1 ITU-T G.8011/Y.1307 (2004) Cor. 1 2005-06-29 15 11.1002/1000/85

10、30 1.2 ITU-T G.8011/Y.1307 (2004) Amd. 1 2005-08-22 15 11.1002/1000/7359 2.0 ITU-T G.8011/Y.1307 2009-01-13 15 11.1002/1000/9660 3.0 ITU-T G.8011/Y.1307 2012-10-29 15 11.1002/1000/11782 3.1 ITU-T G.8011/Y.1307 (2012) Cor. 1 2013-08-29 15 11.1002/1000/12002 4.0 ITU-T G.8011/Y.1307 2015-01-13 15 11.10

11、02/1000/12380 Keywords Ethernet, Ethernet connection, Ethernet service, framework, network-to-network interface, user-to-network interface. _ * To access the Recommendation, type the URL http:/handle.itu.int/ in the address field of your web browser, followed by the Recommendations unique ID. For ex

12、ample, http:/handle.itu.int/11.1002/1000/11830-en. ii Rec. ITU-T G.8011/Y.1307 (01/2015) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications, information and communication technologies (ICTs). The ITU Telecommunication

13、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

14、), 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 wi

15、thin ITU-Ts 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. Compliance with this Recomm

16、endation is voluntary. However, the Recommendation may contain certain mandatory provisions (to ensure, e.g., interoperability or applicability) and compliance with the Recommendation is achieved when all of these mandatory provisions are met. The words “shall“ or some other obligatory language such

17、 as “must“ and the negative equivalents are used to express requirements. The use of such words does not suggest that compliance with the Recommendation is required of any party. INTELLECTUAL PROPERTY RIGHTSITU draws attention to the possibility that the practice or implementation of this Recommenda

18、tion 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

19、 of this Recommendation, ITU had received notice of intellectual property, protected by patents, which may be required to implement this Recommendation. However, implementers are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent d

20、atabase at http:/www.itu.int/ITU-T/ipr/. ITU 2015 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. Rec. ITU-T G.8011/Y.1307 (01/2015) iii Table of Contents Page 1 Scope . 1 2 References . 1 3 Definitions 2 3.1 T

21、erms defined elsewhere 2 3.2 Terms defined in this Recommendation . 2 4 Abbreviations and acronyms 2 5 Summary of Carrier Ethernet 4 5.1 MEF Carrier Ethernet service definition 5 5.2 MEF Carrier Ethernet service attributes . 6 5.3 MEF Carrier Ethernet service architecture . 7 5.4 MEF Carrier Etherne

22、t OAM . 8 Appendix I Summary of MEF specifications . 9 I.1 Architecture documents 9 I.2 Service attribute documents . 10 I.3 Service definition documents . 11 I.4 OAM documents 11 Appendix II Summary of changes from ITU-T G.8011/Y.1307 (2012) . 13 II.1 ITU-T G.8011/Y.1307 comparison 13 II.2 ITU-T G.

23、8011.x/Y.1307.x comparison 13 Bibliography. 15 Rec. ITU-T G.8011/Y.1307 (01/2015) 1 Recommendation ITU-T G.8011/Y.1307 Ethernet service characteristics 1 Scope This Recommendation defines a framework to describe Ethernet services based on Metro Ethernet Forum (MEF) specifications. The framework cons

24、ists of a set of service definitions, service attributes and operation, administration and maintenance (OAM) for each Ethernet virtual connection (EVC), operator virtual connection (OVC), Ethernet connection (EC), Ethernet user-to-network interface (UNI) and Ethernet external network-to-network inte

25、rface (ENNI). The resulting services that can be defined do not refer to a particular network technology implementation and are supported by ITU-T and MEF Ethernet layer architecture models. 2 References The following ITU-T Recommendations and other references contain provisions which, through refer

26、ence in this text, constitute provisions of this Recommendation. At the time of publication, the editions indicated were valid. All Recommendations and other references are subject to revision; users of this Recommendation are therefore encouraged to investigate the possibility of applying the most

27、recent edition of the Recommendations and other references listed below. A list of the currently valid ITU-T Recommendations is regularly published. The reference to a document within this Recommendation does not give it, as a stand-alone document, the status of a Recommendation. ITU-T G.8001 Recomm

28、endation ITU-T G.8001/Y.1354 (2013), Terms and definitions for Ethernet frames over transport. ITU-T G.8010 Recommendation ITU-T G.8010/Y.1306 (2004), Architecture of Ethernet layer networks, plus Amendment 1 (2006), Amendment 2 (2010), Erratum 1 (2007) and Erratum 2 (2007). ITU-T G.8013 Recommendat

29、ion ITU-T G.8013/Y.1731 (2013), OAM functions and mechanisms for Ethernet based networks, plus Amendment 1 (2015). IEEE 802.1Q IEEE 802.1Q (2014), IEEE standard for Local and metropolitan area networks Bridges and Bridged Networks. IEEE 802.1AX IEEE 802.1AX (2014), IEEE Standard for Local and metrop

30、olitan area networks Link Aggregation. IEEE 802.3 IEEE 802.3 (2012), IEEE Standard for Ethernet. MEF 6.2 MEF 6.2 (2014), EVC Ethernet Services Definitions Phase 3. MEF 10.3 MEF 10.3 (2013), Ethernet Services Attributes Phase 3. MEF 12.2 MEF 12.2 (2014), Carrier Ethernet Network Architecture Framewor

31、k Part 2: Ethernet Services Layer. MEF 13 MEF 13 (2005), User Network Interface (UNI) Type 1 Implementation Agreement. MEF 20 MEF 20 (2008), User Network Interface (UNI) Type 2 Implementation Agreement. MEF 22.1 MEF 22.1 (2012), Mobile Backhaul Phase 2, plus Amendment MEF 22.1.1 (2014), Mobile Backh

32、aul Phase 2 Amendment 1 Small Cells. MEF 23.1 MEF 23.1 (2012), Carrier Ethernet Class of Service Phase 2. 2 Rec. ITU-T G.8011/Y.1307 (01/2015) MEF 26.1 MEF 26.1 (2012), External Network Network Interface (ENNI) Phase 2. MEF 28 MEF 28 (2010), External Network Network Interface (ENNI) Support for UNI

33、Tunnel Access and Virtual UNI. MEF 30.1 MEF 30.1 (2013), Service OAM Fault Management Implementation Agreement: Phase 2, plus Amendment MEF 30.1.1 (2014), Correction to Requirement. MEF 33 MEF 33(2012), Ethernet Access Services Definition. MEF 35 MEF 35 (2012), Service OAM Performance Monitoring Imp

34、lementation Agreement, plus Amendments MEF 35.0.1 (2013), SOAM PM Implementation Agreement Amendment 1 and MEF 35.0.2 (2014), Service OAM Performance Monitoring Implementation Agreement Amendment 2. MEF 45 MEF 45 (2014), Multi-CEN L2CP. 3 Definitions 3.1 Terms defined elsewhere This Recommendation u

35、ses the following terms defined elsewhere: 3.1.1 customer: ITU-T G.8001 3.1.2 Ethernet service: ITU-T G.8001 3.1.3 Ethernet virtual connection (EVC): MEF 10.3 3.1.4 external NNI (ENNI): MEF 26.1 3.1.5 NNI: ITU-T G.8001 3.1.6 operator virtual connection (OVC): MEF 26.1 3.1.7 service frame: MEF 10.3 3

36、.1.8 UNI: ITU-T G.8001 3.2 Terms defined in this Recommendation None. 4 Abbreviations and acronyms This Recommendation uses the following abbreviations and acronyms: AP Access Provider APP Application CE Carrier Ethernet CEN Carrier Ethernet Network CoS Class of Service E-Access Ethernet Access EC E

37、thernet Connection EFD Ethernet Flow Domain E-LAN Ethernet LAN E-Line Ethernet Line Rec. ITU-T G.8011/Y.1307 (01/2015) 3 E-LMI Ethernet Link Management Interface ENNI External Network-to-Network Interface EPL Ethernet Private Line EP-tree Ethernet Private tree ETH Ethernet MAC layer network E-Tree E

38、thernet Tree EVC Ethernet Virtual Connection EVPL Ethernet Virtual Private Line EVPLAN Ethernet Virtual Private LAN EVP-tree Ethernet Virtual Private tree FM Fault Management FP Flow Point GARP Generic Attribute Registration Protocol GVRP GARP VLAN Registration Protocol IA Implementation Agreement L

39、AN Local Area Network L2CP Layer 2 Control Protocol MAC Media Access Control MEF Metro Ethernet Forum MEG Maintenance Entity Group MEN Metro Ethernet Network MPLS Multi-Protocol Label Switching MSTP Multiple Spanning Tree Protocol OAM Operation, Administration and Maintenance OTH Optical Transport H

40、ierarchy OVC Operator Virtual Connection PM Performance Monitoring RSTP Rapid Spanning Tree Protocol S-EC Subscriber EC SDH Synchronous Digital Hierarchy SLA Service Level Agreement SOAM Service OAM SONET Synchronous Optical Network SP Service Provider TFP Termination Flow Point TRAN Transport Layer

41、 UNI User-to-Network Interface 4 Rec. ITU-T G.8011/Y.1307 (01/2015) UNI-C Customer side of UNI UNI-N Network side of UNI UTA UNI Tunnel Access VLAN Virtual LAN VoIP Voice over IP VUNI Virtual UNI 5 Summary of Carrier Ethernet Carrier Ethernet (CE) services are enabling service provider (SP) evolutio

42、n of legacy services as well as supporting enterprise business communications, cloud computing and mobility services. CE 2.0, which was launched February 2012, adds five new services to CE 1.0, bringing the total number of services to eight. These eight services encompass both the port-based and vir

43、tual LAN (VLAN)-based Ethernet line (E-Line), Ethernet LAN (E-LAN), Ethernet tree (E-Tree) and Ethernet access (E-Access) services. CE 2.0 is founded on three specific tenets: multiple classes of service (Multi-CoS), interconnectedness and manageability. Figure 1 MEF generations framework Figure 1 p

44、rovides a summary of the MEFs generations framework for Carrier Ethernet. CE 1.0 focused on standardized Ethernet services within a single providers network. CE 2.0 enhances the work of CE 1.0 by extending the specifications to address multiple classes of service, standards for delivering CE service

45、s across multiple, interconnected networks and overall service management of CE services, in particular over multi-provider networks. The multi-CoS, management and interconnected features apply to each of the eight services. Multi-CoS Multi-CoS defines standardized performance objectives across geog

46、raphically defined performance tiers such that long haul services have different target objectives when compared to metro-based services given the derived propagation delay inherent in the distances covered by each performance tier. In addition, MEF specifications have compiled data from a number of

47、 public resources to provide specific application performance requirements and per application type (e.g., voice over IP (VoIP), interactive video, point-of-sale). Interconnectedness Just as the success of the telephone voice system was based on standards enabling the interconnectivity of public swi

48、tched telephone networks, so too is the success of Carrier Ethernet based on standards enabling interconnectivity of Carrier Ethernet networks so that one service can be Rec. ITU-T G.8011/Y.1307 (01/2015) 5 delivered across multiple operators networks without compromising its features such as multi-

49、CoS and manageability. Manageability1 Finally, manageability ensures standards for both fault management (FM) and performance monitoring (PM) of any CE 2.0 service whether they are provided by a single operator or traverse multiple operators networks. Manageability is critical in delivering an assured service that meets its objectives for availability and performance. Furthermore, these features support service providers in differentiating their services to the