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Cdni Status Pages

Content Delivery Networks Interconnection (Active WG)
Art Area: Francesca Palombini, Murray Kucherawy | 2011-Jun-28 —  

2021-07-05 charter

Content Delivery Networks Interconnection (cdni)


 Current Status: Active

     Kevin J. Ma <kevin.j.ma.ietf@gmail.com>
     Sanjay Mishra <sanjay.mishra@verizon.com>

 Applications and Real-Time Area Directors:
     Murray Kucherawy <superuser@gmail.com>
     Francesca Palombini <francesca.palombini@ericsson.com>

 Applications and Real-Time Area Advisor:
     Francesca Palombini <francesca.palombini@ericsson.com>

 Mailing Lists:
     General Discussion: cdni@ietf.org
     To Subscribe:       https://www.ietf.org/mailman/listinfo/cdni
     Archive:            https://mailarchive.ietf.org/arch/browse/cdni/

Description of 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).

  CDNs provide numerous benefits: a shared platform for multi-service
  content delivery, reduced transmission costs 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 of the significant growth in content delivered over IP
  networks, existing CDN providers are scaling up their infrastructure and
  many Network Service Providers and Enterprise Service Providers are
  deploying their own CDNs. Subject to the policy of the CSP, it is
  generally desirable that a given item of content can be delivered to an
  end user regardless of that end user's location or attachment network.
  This creates a need for interconnecting (previously) standalone CDNs so
  they can interoperate and collectively behave as a single delivery

  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). The CDNI WG aims at delivering a
  targeted, deployable solution in a short timeframe as
  needed by the industry. It is expected that the CDNI interfaces will be
  realized using existing IETF protocols for transport and message
  exchange, and using existing object notation grammars/languages for the
  definition of CDNI objects and semantics. In the event that protocol
  extensions or new protocols are deemed necessary by the WG, the WG will

  The working group will focus on the following items:

  - A "requirements" document. This document lists the requirements for
    the CDNI architecture and the CDNI interfaces. In particular, this
    document will focus on identifying a reasonable set of more urgent and
    important requirements that will be addressed in the initial set of
    CDNI protocols and solutions produced by the working group. This
    document will list the requirements stemming from the threat analysis
    and to be met by each of the CDNI interfaces.

  - A "framework" document providing a description of the different
    components of the CDNI architecture and how they interact with one
    another. This document will also include a "threat analysis"
    discussing the security concerns and threats, the trust model and
    privacy issues specific to CDNI.

  - A specification of the "CDNI Request Routing Redirection interface".
    This interface will allow an upstream CDN Request Routing system to
    obtain from the downstream CDN the information necessary to perform
    request redirection. It is actually a logical bundling of two separate
    but related interfaces:

     *  Footprint & Capability Advertisement interface: Asynchronous
        operations to exchange routing information (e.g., the network
        footprint and capabilities served by a given CDN) that enables CDN
        selection for subsequent user requests; and

     *  Request Routing Redirection interface: Synchronous operations to
        select a delivery CDN (surrogate) for a given user request.

  - A specification of the "CDNI Metadata interface". This interface will
    allow the CDNs to exchange content distribution metadata of inter-CDN
    scope. Content distribution metadata refers to the subset of content
    metadata that is relevant to the distribution of the content and
    therefore is to be processed by CDNs (for example, this may include
    information enabling: content acquisition, geo-blocking, enforcement
    of availability windows or access control).

  - A specification of the "CDNI Logging interface". This interface will
    allow CDN logging systems to exchange logging information associated
    with actions that are relevant across CDNs (such as content
    distribution, content delivery and content routing actions) for
    purposes of accounting, analytics, monitoring, etc.

  - A specification of the "CDNI Control interface". In particular, this
    interface will allow an upstream CDN to remove or invalidate content
    in a downstream CDN.

  - A specification for "CDNI URI Signing". This document will specify a
    mechanism that allows interconnected CDNs to support access control
    by signing content URIs. This may involve extensions to the CDNI
    interfaces (e.g. CDNI Metadata interface, CDNI Logging interface).

  The WG will discuss and address the security, management and operational
  issues specific to CDNI, inside the above documents and specifications.

  The working group will only define solutions for aspects of the CDN
  Interconnection problem space that require direct communication or
  interoperation between CDNs.

  In particular, the WG will not define:

  - New session, transport or network protocols.

  - New protocols for delivering content from a CDN to an End User/User

  - New protocols for ingestion of content or metadata between a CSP and a

  - 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.

  - Digital Right Management (DRM) mechanisms.

  The CDNI WG will work with other IETF WGs to assess, and where
  appropriate, leverage protocols developed by those WGs, in order to
  realize the CDNI requirements and CDNI interfaces. For example, the WG
  may assess the suitability of the ALTO protocol as a protocol to enable
  downstream CDNs to exchange information which may aid an upstream CDN
  with making CDNI request routing decisions. The CDNI WG will also
  coordinate with relevant groups outside the IETF, if and where

Goals and Milestones:
  Jun 2020 - Submit specification of CDNI Extensions for HTTPS Delegation to IESG as Proposed Standard
  Dec 2021 - Submit specification of CDNI Control Triggers Interface Extensions to IESG as Proposed Standard
  Jun 2022 - Recharter or dissolve
  Done     - Submit CDNI problem statement to IESG as Informational
  Done     - Submit CDNI use cases to IESG as Informational
  Done     - Submit CDNI requirements to IESG as Informational
  Done     - Submit CDNI framework to IESG as Informational
  Done     - Submit specification of the CDNI Logging interface to IESG as Proposed Standard
  Done     - Submit specification of the CDNI Control interface to IESG as proposed Standard
  Done     - Submit specification of the CDNI Request Routing Redirection interface to IESG as Proposed Standard
  Done     - Submit specification of the CDNI Metadata interface to IESG as Proposed Standard
  Done     - Submit specification of the CDNI Footprint & Capabilities Advertisement interface to IESG as Proposed Standard
  Done     - Submit specification of CDNI Request Routing Extensions to IESG as Proposed Standard
  Done     - Submit specification of URI Signing for CDNI to IESG as Proposed Standard

All charter page changes, including changes to draft-list, rfc-list and milestones:

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