The Content Delivery Networks Interconnection (cdni) WG in the Web and
Internet Transport of the IETF is undergoing rechartering. The IESG has not
made any determination yet. The following draft charter was submitted, and is
provided for informational purposes only. Please send your comments to the
IESG mailing list ([email protected]) by 2025-10-05.

Content Delivery Networks Interconnection (cdni)
-----------------------------------------------------------------------
Current status: Active WG

Chairs:
  Sanjay Mishra <[email protected]>
  Kevin Ma <[email protected]>
  Chris Lemmons <[email protected]>

Assigned Area Director:
  Gorry Fairhurst <[email protected]>

Web and Internet Transport Directors:
  Gorry Fairhurst <[email protected]>
  Mike Bishop <[email protected]>

Mailing list:
  Address: [email protected]
  To subscribe: https://www.ietf.org/mailman/listinfo/cdni
  Archive: https://mailarchive.ietf.org/arch/browse/cdni/

Group page: https://datatracker.ietf.org/group/cdni/

Charter: https://datatracker.ietf.org/doc/charter-ietf-cdni/

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. The working group will
accept new work only when the Area Director approves the new work and adds
the relevant milestones.

Milestones:

  Dec 2025 - Submit specification of CDNI Control Triggers Interface
  Extensions to IESG as Proposed Standard

  Dec 2025 - Submit specification of CDNI Edge Control Metadata to IESG as
  Proposed Standard

  Mar 2026 - Submit specification of CDNI Cache Control Metadata to IESG as
  Proposed Standard

  Mar 2026 - Submit specification of CDNI Protected Secrets Metadata to IESG
  as Proposed Standard

  Jun 2026 - Submit specification of CDNI Client Access Control Metadata to
  IESG as Proposed Standard

  Aug 2026 - Submit specification of CDNI Logging extensions to IESG as
  Proposed Standard

  Nov 2026 - Submit specification of CDNI Named Footprints to IESG as
  Proposed Standard

  Dec 2026 - Recharter or dissolve



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