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 Y.1564 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (02/2016) SERIES Y: GLOBAL INFORMATION INFRASTRUCTURE, INTERNET PROTOCOL ASPECTS AND NEXT-GENERATION NETWORKS, INTERNET OF THINGS AND SMART CITIES Internet protocol asp
2、ects Quality of service and network performance Ethernet service activation test methodology Recommendation ITU-T Y.1564 ITU-T Y-SERIES RECOMMENDATIONS GLOBAL INFORMATION INFRASTRUCTURE, INTERNET PROTOCOL ASPECTS AND NEXT-GENERATION NETWORKS, INTERNET OF THINGS AND SMART CITIES GLOBAL INFORMATION IN
3、FRASTRUCTURE General Y.100Y.199 Services, applications and middleware Y.200Y.299 Network aspects Y.300Y.399 Interfaces and protocols Y.400Y.499 Numbering, addressing and naming Y.500Y.599 Operation, administration and maintenance Y.600Y.699 Security Y.700Y.799 Performances Y.800Y.899 INTERNET PROTOC
4、OL ASPECTS General Y.1000Y.1099 Services and applications Y.1100Y.1199 Architecture, access, network capabilities and resource management Y.1200Y.1299 Transport Y.1300Y.1399 Interworking Y.1400Y.1499 Quality of service and network performance Y.1500Y.1599 Signalling Y.1600Y.1699 Operation, administr
5、ation and maintenance Y.1700Y.1799 Charging Y.1800Y.1899 IPTV over NGN Y.1900Y.1999 NEXT GENERATION NETWORKS Frameworks and functional architecture models Y.2000Y.2099 Quality of Service and performance Y.2100Y.2199 Service aspects: Service capabilities and service architecture Y.2200Y.2249 Service
6、aspects: Interoperability of services and networks in NGN Y.2250Y.2299 Enhancements to NGN Y.2300Y.2399 Network management Y.2400Y.2499 Network control architectures and protocols Y.2500Y.2599 Packet-based Networks Y.2600Y.2699 Security Y.2700Y.2799 Generalized mobility Y.2800Y.2899 Carrier grade op
7、en environment Y.2900Y.2999 FUTURE NETWORKS Y.3000Y.3499 CLOUD COMPUTING Y.3500Y.3999 INTERNET OF THINGS AND SMART CITIES AND COMMUNITIES General Y.4000Y.4049 Definitions and terminologies Y.4050Y.4099 Requirements and use cases Y.4100Y.4249 Infrastructure, connectivity and networks Y.4250Y.4399 Fra
8、meworks, architectures and protocols Y.4400Y.4549 Services, applications, computation and data processing Y.4550Y.4699 Management, control and performance Y.4700Y.4799 Identification and security Y.4800Y.4899 For further details, please refer to the list of ITU-T Recommendations. Rec. ITU-T Y.1564 (
9、02/2016) i Recommendation ITU-T Y.1564 Ethernet service activation test methodology Summary Recommendation ITU-T Y.1564 defines a test methodology that may be used in assessing the proper configuration and performance of an Ethernet network to deliver Ethernet-based services. This out-of-service tes
10、t methodology was created so that service providers may have a standard way of measuring the performance of Ethernet-based services. History Edition Recommendation Approval Study Group Unique ID* 1.0 ITU-T Y.1564 2011-03-01 12 11.1002/1000/11080 2.0 ITU-T Y.1564 2016-02-29 12 11.1002/1000/12752 _ *
11、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 example, http:/handle.itu.int/11.1002/1000/11830-en. ii Rec. ITU-T Y.1564 (02/2016) FOREWORD The International Telecommunication Union (ITU) is th
12、e United Nations specialized agency in the field of telecommunications, 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 Rec
13、ommendations 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. Th
14、e 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-Ts purview, the necessary standards are prepared on a collaborative basis with ISO and IEC. NOTE In this Recommendation, the expression “Admin
15、istration“ is used for conciseness to indicate both a telecommunication 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 co
16、mpliance with the Recommendation is achieved when all of these 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 Recommendatio
17、n is required of any party. INTELLECTUAL PROPERTY RIGHTSITU 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
18、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 Recommenda
19、tion. However, implementers are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database at http:/www.itu.int/ITU-T/ipr/. ITU 2016 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, with
20、out the prior written permission of ITU. Rec. ITU-T Y.1564 (02/2016) 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 3 5 Conventions 4 6 Background on Ethernet network arch
21、itecture and service attributes 4 6.1 Ethernet network architecture . 4 6.2 Ethernet service attributes 5 7 Test architecture and considerations . 7 7.1 Measurement points and measurable sections 8 7.2 Ethernet frame transfer reference events (FRE) . 9 7.3 Test architecture considerations . 10 7.4 R
22、equired test equipment capabilities 11 8 Ethernet service activation test methodology . 12 8.1 Service configuration test . 12 8.2 Service performance test 17 8.3 Test configuration . 19 8.4 Test connectivity considerations 20 8.5 Availability considerations for testing 20 8.6 Frame loss ratio and e
23、rrored frame ratio 21 Appendix I CBS and EBS test methodology 22 I.1 Introduction 22 I.2 CBS test methodology 22 I.3 EBS configuration test methodology 23 Appendix II Example of service activation test reports 27 II.1 Introduction 27 II.2 Service configuration test reporting format 27 II.3 Service p
24、erformance test report format 28 Bibliography. 30 iv Rec. ITU-T Y.1564 (02/2016) Introduction Ethernet services have evolved significantly with the deployment of Ethernet in service providers networks. Not only is Ethernet found at the user network interface (UNI), it can be deployed anywhere in the
25、 network. With the capability to prioritize traffic, its built-in resiliency and high availability, service providers are now using this technology to deliver advanced services. Unfortunately, there are currently no standardized test methodologies that can deliver to the expectation of measuring per
26、formance parameters as specified in ITU-T Y.1563. Prior to this Recommendation, the only methodology widely used to assess performance of Ethernet-based network service was IETFs “Benchmarking Methodology for Network Interconnect Devices“, also known as IETF RFC 2544. b-IETF RFC 2544 was created to
27、evaluate the performance characteristics of network devices in the lab. It was widely adapted to provide performance metrics of Ethernet-based network services as there was no other methodology available to measure the quantities defined in b-IETF RFC 1242. With its capability to measure throughput,
28、 latency, frame loss (FL), and burstability (back-to-back test), b-IETF RFC 2544 could arguably be used to provide performance metrics. However, to do so b-IETF RFC 2544 would have to be used beyond its intended scope. This Recommendation fills the methodological gap for measurement of operational E
29、thernet network services. Also, Ethernet-based services have evolved to include more features and complexities than those covered by the b-IETF RFC 2544 scope. The b-IETF RFC 2544 benchmarking methodology is not applicable to Ethernet service activation because: b-IETF RFC 2544 does not consider mul
30、tiple time durations for tests, as are often performed in operational networks with time-varying impairments. Its procedures find the absolute performance limit of a network element in a laboratory environment rather than verify that a service is delivered to the agreed level. Latency is measured in
31、 a limited way, on only one frame every two minutes, and only at maximum transmitted load with no loss rate, which is very likely much higher than the agreed upon committed information rate (CIR). It does not provide for the verification of configuration and performance of CIR, committed burst size
32、(CBS), excess information rate (EIR), excess burst size (EBS) and colour mode (CM), all important components of the bandwidth profile. Finally, important Ethernet service attributes, such as frame delay variation (FDV), are not part of the methodology. Rec. ITU-T Y.1564 (02/2016) 1 Recommendation IT
33、U-T Y.1564 Ethernet service activation test methodology 1 Scope This Recommendation defines an out-of-service test methodology to assess the proper configuration and performance of an Ethernet service prior to customer notification and delivery. The test methodology applies to point-to-point and poi
34、nt-to-multipoint connectivity (using a pair-wise configuration) in the Ethernet layer, and to the network portions that provide or contribute to the provisioning of such services. This Recommendation does not define Ethernet network architectures or services, but defines a methodology to test Ethern
35、et-based services at the service activation stage. In particular, it addresses testing outside of the scope of b-IETF RFC 2544 methods, as listed in the introduction above. This Recommendation assumes dedicated test equipment in the test methodology. It is understood that this test methodology may b
36、e implemented as a test function inside of a network element. 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 editions indicated were valid. A
37、ll 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 ITU-T Recommendations is r
38、egularly 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.8010 Recommendation ITU-T G.8010/Y.1306 (2004), Architecture of Ethernet layer networks. ITU-T G.8011 Recommendation ITU-T G.8011/Y.1307 (20
39、15), Ethernet service characteristics. ITU-T G.8011.1 Recommendation ITU-T G.8011.1/Y.1307.1 (2013), Ethernet private line service. ITU-T G.8011.2 Recommendation ITU-T G.8011.2/Y.1307.2 (2013), Ethernet virtual private line service. ITU-T G.8012 Recommendation ITU-T G.8012/Y.1308 (2004), Ethernet UN
40、I and Ethernet NNI. ITU-T M.2110 Recommendation ITU-T M.2110 (2002), Bringing into service international multi-operator paths, sections and transmission systems. ITU-T Y.1543 Recommendation ITU-T Y.1543 (2007), Measurements in IP networks for inter-domain performance assessment. ITU-T Y.1563 Recomme
41、ndation ITU-T Y.1563 (2009), Ethernet frame transfer and availability performance. ITU-T Y.1730 Recommendation ITU-T Y.1730 (2004), Requirements for OAM functions in Ethernet-based networks and Ethernet services. ITU-T Y.1731 Recommendation ITU-T Y.1731 (2008), OAM functions and mechanisms for Ether
42、net based networks. 2 Rec. ITU-T Y.1564 (02/2016) IEEE 802.1Q IEEE 802.1Q-2003, IEEE Standards for Local and Metropolitan Area Networks Virtual Bridged Local Area Networks. MEF 10.2 Technical Specification MEF 10.2 (2009), Ethernet Services Attributes, phase 2. 3 Definitions 3.1 Terms defined elsewh
43、ere None. 3.2 Terms defined in this Recommendation This Recommendation defines the following terms: 3.2.1 Ethernet virtual connection (EVC) (derived from MEF 10.2: An association of two or more user network interfaces (UNIs) that limits the exchange of service frames between these interfaces. 3.2.2
44、information rate: The average bit rate of Ethernet service frames at the measurement point (MP) starting with the first medium access control (MAC) address bit and ending with the last frame check sequence (FCS) bit. NOTE Refer to MEF 10.2 for a clear discussion of Ethernet service frames and specif
45、ic examples of information rate the committed information rate (CIR) and the excess information rate (EIR). So, for instance, a 100 Mbit/s Ethernet port can handle a total information rate of about 77 Mbit/s to 99 Mbit/s depending on the average frame size of the transmitted Ethernet frames. 3.2.3 s
46、ervice activation: The step of bringing a network feature into operation for eventual use by a customer, prior to customer notification that the feature is ready to use. 3.2.4 service activation test methodology: The procedures performed after service activation in order to verify that a newly opera
47、tional network feature to be used by a customer is working properly prior to customer notification that the feature is ready to be used. 3.2.5 service acceptance criteria: A set of criteria used to ensure that a service meets its functionality and quality requirement and that the service is ready to
48、 operate when it has been deployed. 3.2.6 test flow: A protocol-compliant frame-size pattern used to simulate a stream of service frames and provide the basis for measurements and test results. Each unique test flow shall be categorized by its source and destination address and other header informat
49、ion, such as quality of service (QoS)/class of service (CoS) at the Ethernet layer (all eight IEEE 802.1Q priorities) and optionally the IP layer. Protocol layer configurations above IP layer may be used as part of the flow configuration because the network under test might require these layers to transmit data between source (SRC) and destination (DST). 3.2.7 utilized line rate: The average bit rate of the Ethernet line at the measurement
