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Framework for CDN Interconnection
draft-ietf-cdni-framework-10

Document type: Active Internet-Draft (cdni WG)
Document stream: IETF
Last updated: 2014-04-10 (latest revision 2014-03-03)
Intended RFC status: Informational
Other versions: plain text, xml, pdf, html

IETF State: Submitted to IESG for Publication
Consensus: Unknown
Document shepherd: Daryl Malas
Shepherd Write-Up: Last changed 2014-01-30

IESG State: IESG Evaluation::AD Followup
IANA Review State: IANA OK - No Actions Needed
IANA Action State: None
(Has 3 DISCUSSes. Has enough positions to pass once DISCUSS positions are resolved.)
Responsible AD: Spencer Dawkins
Send notices to: cdni-chairs@tools.ietf.org, draft-ietf-cdni-framework@tools.ietf.org

Network Working Group                                        L. Peterson
Internet-Draft                                 Akamai Technologies, Inc.
Obsoletes: 3466 (if approved)                                   B. Davie
Intended status: Informational                              VMware, Inc.
Expires: September 4, 2014                       R. van Brandenburg, Ed.
                                                                     TNO
                                                           March 3, 2014

                   Framework for CDN Interconnection
                      draft-ietf-cdni-framework-10

Abstract

   This document presents a framework for Content Distribution Network
   Interconnection (CDNI).  The purpose of the framework is to provide
   an overall picture of the problem space of CDNI and to describe the
   relationships among the various components necessary to interconnect
   CDNs.  CDN Interconnection requires the specification of interfaces
   and mechanisms to address issues such as request routing,
   distribution metadata exchange, and logging information exchange
   across CDNs.  The intent of this document is to outline what each
   interface needs to accomplish, and to describe how these interfaces
   and mechanisms fit together, while leaving their detailed
   specification to other documents.  It obsoletes RFC 3466.

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 September 4, 2014.

Copyright Notice

   Copyright (c) 2014 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Peterson, et al.        Expires September 4, 2014               [Page 1]
Internet-Draft               CDNI Framework                   March 2014

   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
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   3
     1.2.  Reference Model . . . . . . . . . . . . . . . . . . . . .   4
     1.3.  Structure Of This Document  . . . . . . . . . . . . . . .   8
   2.  Building Blocks . . . . . . . . . . . . . . . . . . . . . . .   8
     2.1.  Request Redirection . . . . . . . . . . . . . . . . . . .   8
       2.1.1.  DNS Redirection . . . . . . . . . . . . . . . . . . .   8
       2.1.2.  HTTP Redirection  . . . . . . . . . . . . . . . . . .   9
   3.  Overview of CDNI Operation  . . . . . . . . . . . . . . . . .  10
     3.1.  Preliminaries . . . . . . . . . . . . . . . . . . . . . .  12
     3.2.  Iterative HTTP Redirect Example . . . . . . . . . . . . .  13
     3.3.  Recursive HTTP Redirection Example  . . . . . . . . . . .  18
     3.4.  Iterative DNS-based Redirection       Example . . . . . .  22
     3.5.  Dynamic Footprint Discovery Example . . . . . . . . . . .  25
     3.6.  Content Removal Example . . . . . . . . . . . . . . . . .  27
     3.7.  Pre-Positioned Content Acquisition Example  . . . . . . .  28
     3.8.  Asynchronous CDNI Metadata Example  . . . . . . . . . . .  29
     3.9.  Synchronous CDNI Metadata Acquisition Example . . . . . .  31
     3.10. Content and Metadata Acquisition with Multiple Upstream
           CDNs  . . . . . . . . . . . . . . . . . . . . . . . . . .  33
   4.  Main Interfaces . . . . . . . . . . . . . . . . . . . . . . .  34
     4.1.  In-Band versus Out-of-Band Interfaces . . . . . . . . . .  35
     4.2.  Cross Interface Concerns  . . . . . . . . . . . . . . . .  35
     4.3.  Request Routing Interfaces  . . . . . . . . . . . . . . .  36
     4.4.  CDNI Logging Interface  . . . . . . . . . . . . . . . . .  37
     4.5.  CDNI Control Interface  . . . . . . . . . . . . . . . . .  39

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