The IESG has approved the following document: - 'Content Distribution Network Interconnection (CDNI) Problem Statement' (draft-ietf-cdni-problem-statement-08.txt) as Informational RFC This document is the product of the Content Delivery Networks Interconnection Working Group. The IESG contact persons are Martin Stiemerling and Wesley Eddy. A URL of this Internet Draft is: http://datatracker.ietf.org/doc/draft-ietf-cdni-problem-statement/ Technical Summary Content Delivery Networks (CDNs) provide numerous benefits: reduced delivery cost for cacheable content, improved quality of experience for End Users and increased robustness of delivery. For these reasons they are frequently used for large-scale content delivery. As a result, existing CDN Providers are scaling up their infrastructure and many Network Service Providers (NSPs) are deploying their own CDNs. It is generally desirable that a given content item can be delivered to an End User regardless of that End User's location or attachment network. This is the motivation for interconnecting standalone CDNs so they can interoperate as an open content delivery infrastructure for the end-to-end delivery of content from Content Service Providers (CSPs) to End Users. However, no standards or open specifications currently exist to facilitate such CDN interconnection. The goal of this document is to outline the problem area of CDN interconnection for the IETF CDNI (CDN Interconnection) working group. Working Group Summary There was strong consensus in the CDNI WG to publish this document as its Problem Statement. Document Quality Despite many existing CDN implementations, there are no implementations of CDN interconnection that resolve the functional and operational challenges raised in this Problem Statement. Personnel Richard Woundy (richard_woundy@cable.comcast.com) is the Document Shepherd. Martin Stiemerling is the Responsible Area Director. RFC Editor Note Please replace the first paragraph in Appendix A. "Design considerations for realizing the CDNI Interfaces" with this text OLD This section expands on how CDNI interfaces can reuse and leverage existing protocols before describing each CDNI interface individually and highlighting example candidate protocols that could be considered for reuse or leveraging to implement the CDNI interfaces. NEW This section expands on how CDNI interfaces can reuse and leverage existing protocols before describing each CDNI interface individually and highlighting example candidate protocols that could be considered for reuse or leveraging to implement the CDNI interfaces. However, the options discussed here are purely examples and do not present any consensus on protocols to be used later on.
