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 (11/2016) 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, NEXT-GENERATION NETWORKS, INTERNET OF THINGS AND SMART CITIES 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 A
3、ND NETWORKS INTERNATIONAL TELEPHONE 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 C
4、ARRIER TELEPHONE SYSTEMS ON RADIO-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.
5、899 DIGITAL SECTIONS AND DIGITAL LINE 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 ove
6、r Transport aspects G.8000G.8099 MPLS 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 (11/2
7、016) i Recommendation ITU-T G.8011/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 modelli
8、ng of Ethernet layer networks described by 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/
9、Y.1307.1 (2013), ITU-T G.8011.2/Y.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) Co
10、r. 1 2005-06-29 15 11.1002/1000/8530 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
11、 G.8011/Y.1307 2015-01-13 15 11.1002/1000/12380 5.0 ITU-T G.8011/Y.1307 2016-11-13 15 11.1002/1000/13093 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/
12、in the address field of your web browser, followed by the Recommendations unique ID. For example, http:/handle.itu.int/11.1002/1000/11830-en. ii Rec. ITU-T G.8011/Y.1307 (11/2016) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of teleco
13、mmunications, information and communication technologies (ICTs). 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 telecomm
14、unications 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 proc
15、edure laid down in WTSA Resolution 1. In some areas of information technology which fall within 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 tele
16、communication administration and a recognized operating agency. Compliance with this Recommendation 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 t
17、hese mandatory provisions are met. The words “shall“ or some other obligatory language such 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 RIGHTSIT
18、U 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 memb
19、ers or others outside of the Recommendation development process. As of the date of approval 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 re
20、present the latest information and are therefore strongly urged to consult the TSB patent database at http:/www.itu.int/ITU-T/ipr/. ITU 2017 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.1
21、307 (11/2016) iii Table of Contents Page 1 Scope . 1 2 References . 1 3 Definitions 2 3.1 Terms defined elsewhere 2 3.2 Terms defined in this Recommendation . 2 4 Abbreviations and acronyms 2 5 Conventions 4 6 Summary of Carrier Ethernet 4 6.1 Description of MEF Carrier Ethernet service . 5 6.2 Desc
22、ription of MEF Carrier Ethernet service attributes . 6 6.3 Description of MEF Carrier Ethernet service architecture . 7 6.4 Description of MEF Carrier Ethernet OAM . 8 6.5 Description of MEF OVC service 8 Appendix I Summary of MEF specifications . 9 I.1 Architecture documents 10 I.2 Service attribut
23、e documents . 10 I.3 Service definition documents . 11 I.4 OAM documents 12 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.8011.x/Y.1307.x comparison 14 Bibliography. 16 Rec. ITU-T G.8011/Y.1307 (11/2016) 1 Recommendation ITU-T
24、 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 consists of a set of service definitions, service attributes and operation, administration and maintenance (
25、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 interface (ENNI). The resulting services that can be defined do not refer to a particular network technology
26、 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 reference in this text, constitute provisions of this Recommendation. At the time of publication, the edition
27、s 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 recent edition of the Recommendations and other references listed below. A list of the currently valid I
28、TU-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 Recommendation ITU-T G.8001/Y.1354 (2016), Terms and definitions for Ethernet frames over transport. ITU-T G.8
29、010 Recommendation ITU-T G.8010/Y.1306 (2004), Architecture of Ethernet layer networks. ITU-T G.8013-2015 Recommendation ITU-T G.8013/Y.1731 (2015), Operations, administration and maintenance (OAM) functions and mechanisms for Ethernet-based networks. IEEE 802.1Q IEEE 802.1Q (2014), IEEE Standard fo
30、r Local and metropolitan area networks Bridges and Bridged Networks. IEEE 802.1AX IEEE 802.1AX (2014), IEEE Standard for Local and metropolitan area networks Link Aggregation. IEEE 802.3 IEEE 802.3 (2015), IEEE Standard for Ethernet. MEF 6.2 MEF 6.2 (2014), EVC Ethernet Services Definitions Phase 3.
31、 MEF 10.3 MEF 10.3 (2013), Ethernet Services Attributes Phase 3. MEF 10.3.1 MEF 10.3.1 (2015), Composite Performance Metric (CPM) Amendment to MEF 10.3. MEF 10.3.2 MEF 10.3.2 (2015), UNI Resiliency Enhancement Amendment to MEF 10.3. MEF 12.2 MEF 12.2 (2014), Carrier Ethernet Network Architecture Fra
32、mework 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. 2 Rec. ITU-T G.8011/Y.1307 (11/2016) MEF 22.2 MEF 22.2 (2016), Mobile Backhaul Phase 3 Imple
33、mentation Agreement. MEF 23.2 MEF 23.2 (2016), Carrier Ethernet Class of Service Phase 3 Implementation Agreement. MEF 26.2 MEF 26.2 (2016), External Network Network Interface (ENNI) and Operator Service Attributes. MEF 30.1 MEF 30.1 (2013), Service OAM Fault Management Implementation Agreement: Pha
34、se 2, plus Amendment MEF 30.1.1 (2014), Correction to Requirement. MEF 33 MEF 33 (2012), Ethernet Access Services Definition. MEF 35.1 MEF 35.1 (2015), Service OAM Performance Monitoring Implementation Agreement. MEF 43 MEF 43 (2014), Virtual NID (vNID) Functionality for E-Access Services. MEF 45 ME
35、F 45 (2014), Multi-CEN L2CP. MEF 47 MEF 47 (2014), Carrier Ethernet Services for Cloud implementation Agreement. MEF 51 MEF 51 (2015), OVC Services Definitions. 3 Definitions 3.1 Terms defined elsewhere This Recommendation uses the following terms defined elsewhere: 3.1.1 customer: ITU-T G.8001 3.1.
36、2 Ethernet service: ITU-T G.8001 3.1.3 Ethernet virtual connection (EVC): MEF 10.3 3.1.4 external NNI (ENNI): MEF 26.2 3.1.5 network-to-network interface (NNI): ITU-T G.8001 3.1.6 operator virtual connection (OVC): MEF 26.2 3.1.7 service frame: MEF 10.3 3.1.8 user-to-network interface (UNI): ITU-T G
37、.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 Rec. ITU-T G.8011/Y.1
38、307 (11/2016) 3 EC Ethernet Connection EFD Ethernet Flow Domain E-LAN Ethernet LAN E-Line Ethernet Line 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 Ethernet Tree EVC
39、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 LAN Local Area Net
40、work 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 Hierarchy O-Line O
41、VC Line O-LAN OVC LAN O-Tree OVC Tree OVC Operator Virtual Connection PM Performance Monitoring RSTP Rapid Spanning Tree Protocol S-EC Subscriber EC SDH Synchronous Digital Hierarchy 4 Rec. ITU-T G.8011/Y.1307 (11/2016) SLA Service Level Agreement SOAM Service OAM SONET Synchronous Optical Network S
42、P Service Provider TFP Termination Flow Point TRAN Transport Layer UNI User-to-Network Interface 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 Conventions None. 6 Summary of Carrier Ethernet This clause provides a su
43、mmary of Carrier Ethernet (CE). Normative definitions for the Carrier Ethernet services and terminology are found in the MEF documents listed in clause 2. Carrier Ethernet services are enabling service provider (SP) evolution of legacy services as well as supporting enterprise business communication
44、s, 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 virtual LAN (VLAN)-based Ethernet line (E-Line), Ethernet LAN (E-LAN), Ethernet
45、 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 provides a summary of the MEFs generations framework for Carrier Ethernet. CE
46、 1.0 focused on standardized Ethernet services within a single providers network. Rec. ITU-T G.8011/Y.1307 (11/2016) 5 CE 2.0 enhances the work of CE 1.0 by extending the specifications to address multiple classes of service, standards for delivering CE services across multiple, interconnected netwo
47、rks 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 geographically defined performance tiers su
48、ch 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 public resources to provide specific a
49、pplication 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 switched 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 delivered across multiple opera
