Request Routing Redirection Interface for Content Delivery Network (CDN) Interconnection
RFC 7975
| Document | Type | RFC - Proposed Standard (October 2016; No errata) | |
|---|---|---|---|
| Authors | Ben Niven-Jenkins , Ray van Brandenburg | ||
| Last updated | 2016-10-13 | ||
| Stream | Internet Engineering Task Force (IETF) | ||
| Formats | plain text html pdf htmlized (tools) htmlized bibtex | ||
| Reviews | |||
| Stream | WG state | Submitted to IESG for Publication | |
| Document shepherd | Kevin Ma | ||
| Shepherd write-up | Show (last changed 2016-01-28) | ||
| IESG | IESG state | RFC 7975 (Proposed Standard) | |
| Action Holders |
(None)
|
||
| Consensus Boilerplate | Yes | ||
| Telechat date | |||
| Responsible AD | Alexey Melnikov | ||
| Send notices to | "Kevin J. Ma" <kevin.j.ma@ericsson.com> | ||
| IANA | IANA review state | Version Changed - Review Needed | |
| IANA action state | RFC-Ed-Ack | ||
Internet Engineering Task Force (IETF) B. Niven-Jenkins, Ed.
Request for Comments: 7975 Nokia
Category: Standards Track R. van Brandenburg, Ed.
ISSN: 2070-1721 TNO
October 2016
Request Routing Redirection Interface for
Content Delivery Network (CDN) Interconnection
Abstract
The Request Routing interface comprises (1) the asynchronous
advertisement of footprint and capabilities by a downstream Content
Delivery Network (CDN) that allows an upstream CDN to decide whether
to redirect particular user requests to that downstream CDN; and (2)
the synchronous operation of an upstream CDN requesting whether a
downstream CDN is prepared to accept a user request and of a
downstream CDN responding with how to actually redirect the user
request. This document describes an interface for the latter part,
i.e., the CDNI Request Routing Redirection interface.
Status of This Memo
This is an Internet Standards Track document.
This document is a product of the Internet Engineering Task Force
(IETF). It represents the consensus of the IETF community. It has
received public review and has been approved for publication by the
Internet Engineering Steering Group (IESG). Further information on
Internet Standards is available in Section 2 of RFC 7841.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
http://www.rfc-editor.org/info/rfc7975.
Niven-Jenkins, et al. Standards Track [Page 1]
RFC 7975 Request Routing Redirection October 2016
Copyright Notice
Copyright (c) 2016 IETF Trust and the persons identified as the
document authors. All rights reserved.
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
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. Interface Function and Operation Overview . . . . . . . . . . 4
4. HTTP-Based Interface for the Redirection Interface . . . . . 6
4.1. Information Passed in RI Requests and Responses . . . . . 8
4.2. JSON Encoding of RI Requests and Responses . . . . . . . 9
4.3. MIME Media Types Used by the RI Interface . . . . . . . . 11
4.4. DNS Redirection . . . . . . . . . . . . . . . . . . . . . 12
4.4.1. DNS Redirection Requests . . . . . . . . . . . . . . 12
4.4.2. DNS Redirection Responses . . . . . . . . . . . . . . 14
4.5. HTTP Redirection . . . . . . . . . . . . . . . . . . . . 17
4.5.1. HTTP Redirection Requests . . . . . . . . . . . . . . 17
4.5.2. HTTP Redirection Responses . . . . . . . . . . . . . 19
4.6. Cacheability and Scope of Responses . . . . . . . . . . . 22
4.7. Error Responses . . . . . . . . . . . . . . . . . . . . . 24
4.8. Loop Detection and Prevention . . . . . . . . . . . . . . 28
5. Security Considerations . . . . . . . . . . . . . . . . . . . 29
5.1. Authentication, Authorization, Confidentiality, and
Integrity Protection . . . . . . . . . . . . . . . . . . 29
5.2. Privacy . . . . . . . . . . . . . . . . . . . . . . . . . 30
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 31
6.1. CDNI Payload Type Parameter Registrations . . . . . . . . 31
6.1.1. CDNI RI Redirection Request Payload Type . . . . . . 31
6.1.2. CDNI RI Redirection Response Payload Type . . . . . . 31
6.2. RI Error Response Registry . . . . . . . . . . . . . . . 31
7. References . . . . . . . . . . . . . . . . . . . . . . . . . 32
7.1. Normative References . . . . . . . . . . . . . . . . . . 32
7.2. Informative References . . . . . . . . . . . . . . . . . 34
Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . . 34
Contributors . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 35
Niven-Jenkins, et al. Standards Track [Page 2]
RFC 7975 Request Routing Redirection October 2016
1. Introduction
A Content Delivery Network (CDN) is a system built on an existing IP
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