1、.- . ?. I I INTERNATIONAL TELECOMMUNICATION UNION . ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU G.8011/Y.1307 (08/2004) SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS Digital networks - General aspects SERIES Y: GLOBAL INFORMATION INFRASTRUCTURE, INTERNET PROTOCOL A
2、SPECTS AND NEXT GENERATION NETWORKS Internet protocol aspects - Transport Ethernet over Transport - Ethernet services framework ITU-T Recommendation G.8011/Y.1307 ITU-T G-SERIES RECOMMENDATIONS TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS INTERNATIONAL TELEPHONE CONNECTIONS AND CIRCU
3、ITS TRANSMISSION SYSTEMS GENERAL CHARACTERISTICS COMMON TO ALL ANALOGUE CARRIER- INDIVIDUAL CHARACTERISTICS OF INTERNATIONAL CARRIER TELEPHONE SYSTEMS ON METALLIC LINES GENERAL CHARACTERISTICS OF INTERNATIONAL CARRIER TELEPHONE SYSTEMS ON RADIO-RELAY OR SATELLITE LINKS AND INTERCONNECTION WITH METAL
4、LIC LINES COORDINATION OF RADIOTELEPHONY AND LINE TELEPHONY TESTING EQUIPMENTS TRANSMISSION MEDIA CHARACTERISTICS DIGITAL TERMINAL EQUIPMENTS DIGITAL NETWORKS DIGITAL SECTIONS AND DIGITAL LINE SYSTEM ASPECTS TRANSMISSION MEDIA CHARACTERISTICS DIGITAL TERMINAL EQUIPMENTS DIGITAL NETWORKS QUALITY OF S
5、ERVICE AND PERFORMANCE - GENERIC AND USER-RELATED General aspects Design objectives for digital networks Quality and availability targets Network capabilities and functions SDH network characteristics Management of transport network SDH radio and satellite systems integration Optical transport netwo
6、rks G. 1 OO-G. 199 G.200-G.299 G.3004.399 G.400-(3.449 (3.4504.499 G .5 00-(3.599 G.600-G.699 G.700-G.799 G.800-G.899 G.900-G.999 G. 1OOO-G. 1999 G.60004.6999 G.8000-G.8999 G.8000-G.8099 G.7000-G.7999 (3.8 100-G.8 199 G.8200-G.8299 G.83 004.8 399 G.84004.8499 G.8500-G.8599 G.8600-G.8699 G .8 7 004.8
7、 7 99 For further details, please refer to the list of ITU-T Recommendations. ITU-T Recommendation G.8011/Y.1307 Ethernet over Transport - Ethernet services framework Summary This Recommendation describes a framework for defining network-oriented characteristics of Ethernet services. The framework i
8、s based on the modelling of Ethernet layer networks described in ITU-T Rec. G.8010/Y. 1306. The attribute sets introduced in this framework (EC, UNI and “JI) are intended to be used to create numerous specific Ethernet services. Source ITU-T Recommendation G.8011/Y.1307 was approved on 22 August 200
9、4 by ITU-T Study Group 15 (2001-2004) under the ITU-T Recommendation A.8 procedure. Keywords Ethernet, Ethernet service, framework. 1 ITU-T Rec. G.8011/Y.1307 (082004) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications
10、. 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 St
11、andardization 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 informat
12、ion technology which fall within ITU-Ts purview, the necessary standards are prepared on a collaborative basis with IS0 and LEC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness to indicate both a telecommunication administration and a recognized operating agency.
13、 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 these mandatory provisions are met. The words “shall“ or some othe
14、r 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 RIGHTS ITU draws attention to the possibility that the practice or implem
15、entation 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.
16、 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, implementors are cautioned that this may not represent the latest information and are therefore strongly urged
17、to consult the TSB patent database. O ITU 2005 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. 11 ITU-T Rec. G.8011/Y.1307 (08/2004) CONTENTS Scope References . Definitions Abbreviations Conventions Ethernet se
18、rvices . 6.1 Ethernet service areas . 6.2 Ethernet service aspects 6.3 Ethernet services views Ethernet connection attributes 7.1 Network connectivity . 7.2 Transfer characteristics . 7.3 Link type . 7.4 Traffic separation 7.5 Connectivity monitoring . 7.6 Bandwidth profile . 7.7 UNI list . 7.8 Pres
19、ervation 7.9 Survivability . Ethernet UNI attributes . 8.1 ETH UNI 8.2 ETY UNI Ethernet NNI attributes . 9.1 ETH NNI 9.2 Server layer adaptation . Annex A . Relationship of G.80 1 1/Y . 1307 attributes to G.80 1 O/Y . 1306 . A . 1 Introduction A.2 Ethernet connection attributes A.3 Interface attribu
20、tes Annex B - Distributed UNI . B . 1 Introduction B.2 Distributed UNI-N Appendix I - Customer view of Ethernet services I . 1 Introduction 1.2 Ethernet services model 1.3 Ethernet services definitions . 1.4 Ethernet traffic management ITU-T Rec . G.8011/Y.1307 (08/2004) Page 1 1 2 2 3 4 4 7 8 8 9 1
21、1 11 12 13 13 13 13 14 14 14 20 21 21 22 23 23 23 24 25 25 25 26 26 26 27 27 . 111 Page 28 II. 1 Introduction 28 11.2 MEF - G.801 UY.1307 comparison 28 Appendix II - Customer view vs network view of Ethernet services . iv ITU-T Rec. G.8011/Y.1307 (08/2004) Introduction This Recommendation provides t
22、he introduction to a framework for defining network-oriented characteristics of Ethernet services in the transport network. The intent is for G.8011/Y.1307 to be a service-independent framework for Ethernet services based on the architecture of Ethernet over Transport in G.8010/Y. 1306. This Recomme
23、ndation presents attributes that will be used in the G.801 l.x/Y. 1307.x series of Recommendations to define each Ethernet service in this G.8011 .x/Y. 1307.x series. The companion Recommendation, ITU-T Rec. G.8012/Y. 1308, provides an introduction to the Ethernet interfaces that would also be used
24、to define services. This Recommendation specifies three attributes sets (EC, UNI and “I) and values to describe an Ethernet service from the perspective of the network. ITU-T Rec. G.8011/Y.1307 (08/2004) V ITU-T Recommendation G.801UY.1307 Ethernet over Transport - Ethernet services framework 1 Scop
25、e This Recommendation defines a framework to describe a set of Ethernet services. The framework consists of a set of attributes for each of Ethernet connection, Ethernet UNI and Ethernet “I. The resulting services that can be defined do not refer to a particular network technology implementation and
26、 are supported by the Ethernet layer architecture model presented in ITU-T Rec. G.8010/Y.1306. Since the ITU-T focus is on service provider aspects, this Recommendation describes client Ethernet services from the network point of view. This Recommendation provides the framework to define different s
27、ervices to carry an Ethernet link flow. The Ethernet flow domain for each of the services introduced in this Recommendation is defined in a companion set of Recommendations in (3.801 1.x/Y.1307.x. For example, ITU-T Rec. (3.801 l.l/Y. 1307.1 specifies the details only for point-to-point Ethernet pri
28、vate line services. Other services will be specified in more detail in future Recommendations in the (3.801 1 .x/Y.1307.x series of Recommendations. 2 References The following ITU-T Recommendations and other references contain provisions which, through reference in this text, constitute provisions o
29、f 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 recent edition of the Recommendations and
30、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 Recommendation G.809 (2003), Functional architecture of
31、 connectionless layer networks. ITU-T Recommendation G.8010/Y. 1306 (2004), Architecture of Ethernet layer networks. ITU-T Recommendation G.8011.1/Y. 1307.1 (2004), Ethernetprivate line service. ITU-T Recommendation G.8012/Y. 1308 (2004), Ethernet UNI and Ethernet NNI. ITU-T Recommendation G.802 l/Y
32、. 134 1 (2004), Characteristics of Ethernet transport network equipment functional blocks. IEEE 802-200 1 , IEEE Standard for Information technology - Telecommunications and information exchange between systems - Local and metropolitan area networks - Overview and Architecture. IEEE 802.3-2002, IEEE
33、 Standard for Information technology - Telecommunications and information exchange between systems - Local and metropolitan area networks - Specific requirements - Part 3: Carrier Sense Multiple Access with Collision Detection (CSMA/CD) Access Method and Physical Layer Specijications. IEEE 802.1D-19
34、98, IEEE Standard for Information technology - Telecommunications and information exchange between systems - Local and metropolitan area networks - Common specifications - Part 3: Media Access Control (MC) Bridges. IEEE 802.1X-2004, IEEE Standard for Local and metropolitan area networks - Port-based
35、 Network Access Control. ITU-T Rec. G.8011/Y.1307 (08/2004) 1 - IEEE 802.14-2003, Standard for local and metropolitan area networks: Virtual Bridged Local Area Networks. MEF 1 Ethernet Services Model - Phase 1 , 2003. - 3 Definitions 3.1 This Recommendation uses the following terms defined in ITU-T
36、Rec. G.8010/Y. 1306: a) ETH link b) Traffic Conditioning function This Recommendation uses the following terms defined in ITU-T Rec. (3.809: a) Flow domain b) Flow domain flow c) Flow Point d) Flow termination e) Link flow f) Network flow g) Termination flow point This Recommendation uses the follow
37、ing terms defined in ITU-T Rec. G.8012Y. 1308: a) iJNI b) NNI 3.4 This Recommendation defines the following terms: 3.4.1 Ethernet service: An Ethernet service supports an Ethernet flow as defined in ITU-T Rec. G.8010/Y.1306. It is defined by the topology of the Ethernet network and a corresponding s
38、et of attributes associated with the Ethernet connection (EC), the UNI ports, and NNI ports. 3.4.2 customer: The entity that has ownership authority over a set of flow points. The customer may have one or more service instances. 3.4.3 Ethernet service instance: An Ethernet service instance is a part
39、icular instantiation of an Ethernet service supported by a particular flow domain (as defined in ITU-T Rec. G.8010/Y.1306) with a defined set of characteristics as well as at least two UNIS. 3.4.4 access link: The Access Link is the connection between the customer equipment and carrier equipment at
40、the edge of the transport network that is realized through a UNI introduced in this Recommendation and defined for Ethernet in ITU-T Rec. G.8012/Y. 1308. 3.4.5 Ethernet connection: The ETH connection or ETH connectivity (described in 6.6/G.8010/Y.1306) between the UNI-Ns that are part of the same Ne
41、twork Ethernet Service Instance. 3.4.6 Ethernet service area: Identifies the portion of a network that supports an Ethernet service instance. 3.2 3.3 4 Abbreviations This Recommendation uses the following abbreviations: CBR Constant Bit Rate CBS Committed Burst Size CI Characteristic Information 2 I
42、TU-T Rec. G.8011/Y.1307 (08/2004) CIR CLPS co-cs co-PS EBS EC EIR ETH ETY EVC FD FP GARP GMRP GVRP ID LACP LAMP LF MAC MSTP NF NN I PHY RSTP STP TFP UNI VLAN Committed Information Rate Connectionless Packet Switched Connection-Oriented Circuit Switched Connection-Oriented Packet Switched Excess Burs
43、t Size Ethernet Connection Excess Information Rate Ethernet MAC layer network Ethernet PHY layer network Ethernet Virtual Connection Flow Domain Flow Point Generic Attribute Registration Protocol GARP Multicast Registration Protocol GARP VLAN Registration Protocol Identification Link Aggregation Con
44、trol Protocol Link Aggregation Marker Protocol Link Flow Media Access Control Multiple Spanning Tree Protocol Network Flow Network-Network Interface Physical device Rapid Spanning Tree Protocol Spanning Tree Protocol Termination Flow Point User Network Interface Virtual Local Area Network 5 Conventi
45、ons The diagrammatic convention for Ethernet services described in this Recommendation is that of ITU-T Rec. G.8010/Y.1306. Further, the use of ETH link in this Recommendation is that of ITU-T Rec. G.8010/Y.1306. Specifically, ETH link is a generalization that collectively refers to ETH flow point p
46、ool link and ETH flow point pool component link. ITU-T Rec. G.8011/Y.1307 (08/2004) 3 6 Ethernet services This Recommendation does not define Ethernet services, but provides a framework from which services can be defined. This framework is based on the Ethernet transport architecture described in IT
47、U-T Rec. G.8010/Y.1306. 6.1 Ethernet service areas Ethernet service areas identify the various portions of a network that support an Ethernet service instance. A simple model of an Ethernet network (for a single carriers network) is shown in Figure 6-1. Three Ethernet service areas are identified: a
48、ccess (UNI-C to UNI-N), edge-to-edge (the Ethernet connection from UNI-N to UNI-N), and end-to-end (UNI-C to UNI-C). Figure 6-1 also shows a three-tier relationship. The three tiers (equipment on top, ETH layer in the middle and ETY layer on bottom) allow a clear identification of how the equipment
49、functions map onto the ETH and ETY layers. Note that the customer equipment is shown as a flow point on the right and a flow domain (FD) on the left of the diagram to illustrate that both are possible. It is further shown that the UNI reference point occurs in the middle of the access link, or more precisely that the UNI is a reference point whose functionality is split into customer (UNI-C) and network (UNI-N) components. Additional UNI details are defined in ITU-T Rec. G.8012/Y.1308. The relationship between the Ethernet service areas illustrated in Figure 6-1 (and the following two Fi
