Content Internetworking (CDI) Scenarios
RFC 3570

Document Type RFC - Informational (July 2003; No errata)
Obsoleted by RFC 6770
Last updated 2015-10-14
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IESG IESG state RFC 3570 (Informational)
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Network Working Group                                         P. Rzewski
Request for Comments: 3570                         Media Publisher, Inc.
Category: Informational                                           M. Day
                                                                   Cisco
                                                             D. Gilletti
                                                               July 2003

                Content Internetworking (CDI) Scenarios

Status of this Memo

   This memo provides information for the Internet community.  It does
   not specify an Internet standard of any kind.  Distribution of this
   memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (2003).  All Rights Reserved.

Abstract

   In describing content internetworking as a technology targeted for
   use in production networks, it is useful to provide examples of the
   sequence of events that may occur when two content networks decide to
   interconnect.  The scenarios presented here seek to provide some
   concrete examples of what content internetworking is, and also to
   provide a basis for evaluating content internetworking proposals.

Table of Contents

   1.  Introduction...................................................2
       1.1.  Terminology..............................................3
   2.  Special Cases of Content Networks..............................3
       2.1.  Publishing Content Network...............................3
       2.2.  Brokering Content Network................................3
       2.3.  Local Request-Routing Content Network....................4
   3.  Content Internetworking Arrangements...........................5
   4.  Content Internetworking Scenarios..............................5
       4.1.  General Content Internetworking..........................6
       4.2.  BCN providing ACCOUNTING INTERNETWORKING and
             REQUEST-ROUTING INTERNETWORKING..........................9
       4.3.  BCN providing ACCOUNTING INTERNETWORKING................11
       4.4.  PCN ENLISTS multiple CNs................................12
       4.5.  Multiple CNs ENLIST LCN.................................13
   5.  Security Considerations.......................................15
       5.1.  Threats to Content Internetworking......................15
           5.1.1.  Threats to the CLIENT.............................15

Rzewski, et al.              Informational                      [Page 1]
RFC 3570                     CDI Scenarios                     July 2003

           5.1.2.  Threats to the PUBLISHER..........................17
           5.1.3.  Threats to a CN...................................17
   6.  Acknowledgements..............................................18
   7.  References....................................................18
   8.  Authors' Addresses............................................19
   9.  Full Copyright Statement......................................20

1.  Introduction

   In [1], the concept of a "content network" is introduced and
   described.  In addition to describing some general types of content
   networks, it also describes motivations for allowing content networks
   to interconnect (defined as "content internetworking").

   In describing content internetworking as a technology targeted for
   use in production networks, it's useful to provide examples of the
   sequence of events that may occur when two content networks decide to
   interconnect.  Naturally, different types of content networks may be
   created due to different business motivations, and so many
   combinations are likely.

   This document first provides detailed examples of special cases of
   content networks that are specifically designed to participate in
   content internetworking (Section 2).  We then discuss the steps that
   would be taken in order to "bring up" or "tear down" a content
   internetworking arrangement (Section 3).  Next we provide some
   detailed examples of how content networks (such as those from Section
   2) could interconnect (Section 4).  Finally, we describe any security
   considerations that arise specifically from the examples presented
   here (Section 5).

   The scenarios presented here answer two distinct needs:

   1. To provide some concrete examples of what content internetworking
      is, and

   2. To provide a basis for evaluating content internetworking
      proposals.

   A number of content internetworking systems have been implemented,
   but there are few published descriptions. One such description is
   [2].

1.1.  Terminology

   Terms in ALL CAPS are defined in [1] except for the following terms
   defined below in this document: PCN, BCN, and LCN.  Additionally, the
   term SLA is used as an abbreviation for Service Level Agreement.

Rzewski, et al.              Informational                      [Page 2]
RFC 3570                     CDI Scenarios                     July 2003
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