--- 1/draft-ietf-cdni-use-cases-08.txt 2012-07-10 16:14:11.233476874 +0200 +++ 2/draft-ietf-cdni-use-cases-09.txt 2012-07-10 16:14:11.265427160 +0200 @@ -1,53 +1,54 @@ Internet Engineering Task Force G. Bertrand, Ed. Internet-Draft E. Stephan Obsoletes: 3570 (if approved) France Telecom - Orange Intended status: Informational T. Burbridge -Expires: December 20, 2012 P. Eardley +Expires: January 11, 2013 P. Eardley BT K. Ma Azuki Systems, Inc. G. Watson Alcatel-Lucent (Velocix) - June 18, 2012 + July 10, 2012 Use Cases for Content Delivery Network Interconnection - draft-ietf-cdni-use-cases-08 + draft-ietf-cdni-use-cases-09 Abstract Content Delivery Networks (CDNs) are commonly used for improving the - End User experience of a content delivery service, at a reasonable - cost. This document focuses on use cases that correspond to - identified industry needs and that are expected to be realized once - open interfaces and protocols supporting interconnection of CDNs are - specified and implemented. The document can be used to guide the - definition of the requirements to be supported by CDN Interconnection - (CDNI) interfaces. It obsoletes RFC 3570. + End User experience of a content delivery service while keeping cost + at a reasonable level. This document focuses on use cases that + correspond to identified industry needs and that are expected to be + realized once open interfaces and protocols supporting + interconnection of CDNs are specified and implemented. The document + can be used to guide the definition of the requirements to be + supported by CDN Interconnection (CDNI) interfaces. It obsoletes RFC + 3570. Status of this Memo This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet- Drafts is at http://datatracker.ietf.org/drafts/current/. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." - This Internet-Draft will expire on December 20, 2012. + This Internet-Draft will expire on January 11, 2013. Copyright Notice Copyright (c) 2012 IETF Trust and the persons identified as the document authors. All rights reserved. This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (http://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents @@ -84,28 +85,28 @@ 9. Informative References . . . . . . . . . . . . . . . . . . . . 13 Appendix A. Content Service Providers' Delivery Policies . . . . 13 A.1. Content Delivery Policy Enforcement . . . . . . . . . . . 13 A.2. Secure Access . . . . . . . . . . . . . . . . . . . . . . 14 A.3. Branding . . . . . . . . . . . . . . . . . . . . . . . . . 15 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 15 1. Introduction Content Delivery Networks (CDNs) are commonly used for improving the - End User experience of a content delivery service, at a reasonable - cost. This document focuses on use cases that correspond to - identified industry needs and that are expected to be realized once - open interfaces and protocols supporting interconnection of CDNs are - specified and implemented. The document can be used to guide the - definition of the requirements (as documented in - [I-D.ietf-cdni-requirements]) to be supported by the set of CDN - Interconnection (CDNI) interfaces defined in + End User experience of a content delivery service while keeping cost + at a reasonable level. This document focuses on use cases that + correspond to identified industry needs and that are expected to be + realized once open interfaces and protocols supporting + interconnection of CDNs are specified and implemented. The document + can be used to guide the definition of the requirements (as + documented in [I-D.ietf-cdni-requirements]) to be supported by the + set of CDN Interconnection (CDNI) interfaces defined in [I-D.ietf-cdni-problem-statement]. RFC 3570 described slightly different terminologies and models for "Content Internetworking (CDI)". The present document obsoletes RFC 3570 to avoid confusion. This document identifies the main motivations for a CDN Provider to interconnect its CDN: o CDN Footprint Extension Use Cases (Section 2) @@ -488,20 +489,25 @@ 2. CDN-A has footprint covering traditional fixed line broadband and wants to extend coverage to mobile devices. In this case, CDN-A may contract and interconnect with CDN-B who has both: * physical footprint inside the mobile network, * the ability to deliver content over a protocol that is required by specific mobile devices. + 3. CDN-A only supports IPv4 within its infrastructure but wants to + deliver content over IPv6. CDN-B supports both IPv4 and IPv6 + within its infrastructure. CDN-A interconnects with CDN-B to + serve out its content over native IPv6 connections. + These cases can apply to many CDN features that a given CDN Provider may not be able to support or not be willing to invest in, and thus, that the CDN Provider would delegate to another CDN. 4.2. Technology and Vendor Interoperability A CDN Provider may deploy a new CDN to run alongside its existing CDN, as a simple way of migrating its CDN service to a new technology. In addition, a CDN Provider may have a multi-vendor strategy for its CDN deployment. Finally, a CDN Provider may want to @@ -554,22 +560,22 @@ 9. Informative References [I-D.ietf-cdni-framework] Peterson, L. and B. Davie, "Framework for CDN Interconnection", draft-ietf-cdni-framework-00 (work in progress), April 2012. [I-D.ietf-cdni-problem-statement] Niven-Jenkins, B., Faucheur, F., and N. Bitar, "Content Distribution Network Interconnection (CDNI) Problem - Statement", draft-ietf-cdni-problem-statement-06 (work in - progress), May 2012. + Statement", draft-ietf-cdni-problem-statement-08 (work in + progress), June 2012. [I-D.ietf-cdni-requirements] Leung, K. and Y. Lee, "Content Distribution Network Interconnection (CDNI) Requirements", draft-ietf-cdni-requirements-03 (work in progress), June 2012. [RFC2818] Rescorla, E., "HTTP Over TLS", RFC 2818, May 2000. Appendix A. Content Service Providers' Delivery Policies