Content Delivery Networks Interconnection (cdni)

WG Name Content Delivery Networks Interconnection
Acronym cdni
Area Web and Internet Transport (wit)
State Active
Charter charter-ietf-cdni-03 Approved
Document dependencies
Additional resources Issue tracker, Wiki, Zulip Stream
Personnel Chairs Chris Lemmons, Kevin J. Ma, Sanjay Mishra
Area Director Gorry Fairhurst
Mailing list Address cdni@ietf.org
To subscribe https://www.ietf.org/mailman/listinfo/cdni
Archive https://mailarchive.ietf.org/arch/browse/cdni/
Chat Room address https://zulip.ietf.org/#narrow/stream/cdni

Charter for Working Group

A Content Delivery Network (CDN) is an infrastructure of network
 elements operating at layer 4 through layer 7, arranged for the
 efficient distribution and delivery of digital content. Such content
 includes, but is not limited to, web pages and images delivered via 
HTTP, and streaming of continuous media delivered via HTTP, RTSP, RTMP, 
etc. CDNs typically provide services to multiple Content Service
Providers (CSPs).
 The goal of the CDNI Working Group is to allow the interconnection of
 separately administered CDNs in support of the end-to-end delivery of
 content from CSPs through multiple CDNs and ultimately to end users (via
 their respective User Agents).

This Working Group is charged with maintaining and developing the specifications for CDNI. The current work items are:

Defining CDNI Metadata

The CDNI Specifications define metadata for exchanging information required for CDNs to cooperate as described in RFC 7336, Framework for Content Distribution Network Interconnection. This includes metadata definitions, defined across multiple documents, for the following:
* CDNI Request Routing interface, including the Footprint and Capabilities interface and Redirection interface;
* CDNI Metadata interface;
* CDNI Logging interface; and
* CDNI Control interface.

These interfaces define how CDNs communicate the information required to direct requests and deliver content, including all the information required to obtain, transform, synthesize, distribute, protect, and communicate about that content, as is typical for CDNs.

The working group will only define specifications that require direct communication or interoperation between CDNs. It will not define:
* New session, transport or network protocols;
* New protocols for delivering content from a CDN to an End User/User Agent;
* New protocols for ingestion of content or metadata between a CSP and a CDN;
* New protocols for acquiring content across CDNs;
* Protocols and algorithms for intra-CDN operations;
* Support for Transparent Caching across CDNs;
* New applications consuming CDNI logs; or
* Digital Right Management (DRM) mechanisms.

The working group will collaborate with other groups both inside and outside the IETF as necessary to accomplish these goals.

Milestones

Date Milestone Associated documents
Jul 2027 Recharter or dissolve
Jun 2027 Submit specification of CDNI Named Footprints to IESG as Proposed Standard draft-ietf-cdni-named-footprints
Dec 2026 Submit specification of CDNI Processing Stages Metadata to IESG as Proposed Standard draft-ietf-cdni-processing-stages-metadata
Oct 2026 Submit specification of Source Access Control Metadata to IESG as Proposed Standard draft-ietf-cdni-source-access-control-metadata
Oct 2026 Submit specification of CDNI Cache Control Metadata to IESG as Proposed Standard draft-ietf-cdni-cache-control-metadata
Sep 2026 Submit specification of CDNI Logging extensions to IESG as Proposed Standard draft-ietf-cdni-logging-extensions
Jul 2026 Submit specification of Metadata Expression Language to IESG as Proposed Standard draft-ietf-cdni-metadata-expression-language
Jun 2026 Submit specification of CDNI Client Access Control Metadata to IESG as Proposed Standard draft-ietf-cdni-client-access-control-metadata
Mar 2026 Submit specification of CDNI Protected Secrets Metadata to IESG as Proposed Standard draft-ietf-cdni-protected-secrets-metadata
Mar 2026 Submit specification of CDNI Delivery Metadata draft-ietf-cdni-delivery-metadata
Dec 2025 Submit specification of CDNI Edge Control Metadata to IESG as Proposed Standard draft-ietf-cdni-edge-control-metadata
Dec 2025 Submit specification of CDNI Control Triggers Interface Extensions to IESG as Proposed Standard draft-ietf-cdni-ci-triggers-rfc8007bis