1、 International Telecommunication Union ITU-T Y.1415TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Amendment 1(04/2007) SERIES Y: GLOBAL INFORMATION INFRASTRUCTURE, INTERNET PROTOCOL ASPECTS AND NEXT-GENERATION NETWORKS Internet protocol aspects Interworking Ethernet-MPLS network interworking User p
2、lane interworking Amendment 1: New Appendix II Use of Ethernet-MPLS interworking for transport of IP/MPLS services ITU-T Recommendation Y.1415 (2005) Amendment 1 ITU-T Y-SERIES RECOMMENDATIONS GLOBAL INFORMATION INFRASTRUCTURE, INTERNET PROTOCOL ASPECTS AND NEXT-GENERATION NETWORKS GLOBAL INFORMATIO
3、N INFRASTRUCTURE 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 PR
4、OTOCOL 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, admin
5、istration and maintenance Y.1700Y.1799 Charging Y.1800Y.1899 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 aspects: Interoperabili
6、ty of services and networks in NGN Y.2250Y.2299 Numbering, naming and addressing Y.2300Y.2399 Network management Y.2400Y.2499 Network control architectures and protocols Y.2500Y.2599 Security Y.2700Y.2799 Generalized mobility Y.2800Y.2899 For further details, please refer to the list of ITU-T Recomm
7、endations. ITU-T Rec. Y.1415 (2005)/Amd.1 (04/2007) i ITU-T Recommendation Y.1415 Ethernet-MPLS network interworking User plane interworking Amendment 1 New Appendix II Use of Ethernet-MPLS interworking for transport of IP/MPLS services Summary New Appendix II to ITU-T Recommendation Y.1415 describe
8、s use of ITU-T Recommendation Y.1415 to interconnect IP/MPLS networks that are attached to a server MPLS network via Ethernet. Source Amendment 1 to ITU-T Recommendation Y.1415 (2005) was agreed on 27 April 2007 by ITU-T Study Group 13 (2005-2008). ii ITU-T Rec. Y.1415 (2005)/Amd.1 (04/2007) FOREWOR
9、D 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
10、 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
11、. 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-Ts purview, the necessary standards are prepared on a collaborative basis with ISO and IEC. NOTE In this Recommendation, the expression “A
12、dministration“ 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
13、compliance 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 Recommendat
14、ion is required of any party. 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 claim
15、ed 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 Recomme
16、ndation. 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 2007 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, w
17、ithout the prior written permission of ITU. ITU-T Rec. Y.1415 (2005)/Amd.1 (04/2007) 1 ITU-T Recommendation Y.1415 Ethernet-MPLS network interworking User plane interworking Amendment 1 New Appendix II Use of Ethernet-MPLS interworking for transport of IP/MPLS services (This appendix does not form a
18、n integral part of this Recommendation) The IWF defined in the body of this Recommendation provides a point-to-point Ethernet service using MPLS as the transport network. This appendix describes use of this Recommendation to interconnect IP/MPLS networks that are attached to a server MPLS network vi
19、a Ethernet, as depicted in Figure II.1. Y.1415AMD.1_FII.1IP/MPLS service MPLS server networkEthernetTunnel LSP MPLS LSPEthernet virtual private line Ethernet interworking LSP EthernetIP/MPLSclient networkIWF2MPLSETHIWF1ETHIP/MPLSIWF3MPLS ETHIWF4ETHIP/MPLSIP/MPLSclient networkFigure II.1 Functional m
20、odel for transport of a client IP/MPLS over MPLS using Ethernet-MPLS client-server interworking Figure II.1 depicts the functional model for transport of a client IP/MPLS over MPLS using Ethernet-MPLS client-server interworking as defined in this Recommendation. An MPLS label switch path (LSP) is pr
21、ovisioned in the server MPLS network between IWF2 and IWF3. An Ethernet interworking LSP is set up over this MPLS network, enabling IP or MPLS traffic encapsulated in Ethernet to be carried between IWF1 and IWF4. The functioning of IWF1 and IWF4 is beyond the scope of this Recommendation. 2 ITU-T Re
22、c. Y.1415 (2005)/Amd.1 (04/2007) For this application: label merging is not used except to support fast reroute; penultimate-hop popping (PHP) is not enabled in the MPLS server network; equal cost multipath (ECMP) mechanisms are not used; the common interworking indicators are used, but the sequence
23、 number is set to zero; the tunnel label(s) and interworking label are provisioned (i.e., not signalled); the MPLS EXP field may be used; VCCV-based OAM may be used. Printed in Switzerland Geneva, 2007 SERIES OF ITU-T RECOMMENDATIONS Series A Organization of the work of ITU-T Series D General tariff
24、 principles Series E Overall network operation, telephone service, service operation and human factors Series F Non-telephone telecommunication services Series G Transmission systems and media, digital systems and networks Series H Audiovisual and multimedia systems Series I Integrated services digi
25、tal network Series J Cable networks and transmission of television, sound programme and other multimedia signals Series K Protection against interference Series L Construction, installation and protection of cables and other elements of outside plant Series M Telecommunication management, including
26、TMN and network maintenance Series N Maintenance: international sound programme and television transmission circuits Series O Specifications of measuring equipment Series P Telephone transmission quality, telephone installations, local line networks Series Q Switching and signalling Series R Telegra
27、ph transmission Series S Telegraph services terminal equipment Series T Terminals for telematic services Series U Telegraph switching Series V Data communication over the telephone network Series X Data networks, open system communications and security Series Y Global information infrastructure, Internet protocol aspects and next-generation networks Series Z Languages and general software aspects for telecommunication systems
