Network Working Group M-K. Shin
Internet-Draft S. Lee
Intended status: Informational ETRI
Expires: October 2013 D. Chang
T. Kwon
SNU
February 15, 2013
CDNI Request Routing with SDN
draft-shin-cdni-request-routing-sdn-01
Abstract
Software-defined networking (SDN) is emerging and intensively
discussed as one of the most promising technologies to provide
centralized, programmable control planes for network service
providers (NSPs). In this sense, SDN could be also considered as one
of candidates to facilitate CDNI Request Routing. This document
discusses how SDN can be used for downstream CDN selection within
CDNI request routing.
Requirements Language
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in RFC 2119 [RFC2119].
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Shin et al., Expires October 2013 [Page 1]
Internet-Draft CDNI Request Routing with OF/SDN February 15, 2013
This Internet-Draft will expire on January 1, 2013.
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. SDN Overview and Assumption . . . . . . . . . . . . . . . . . 3
3. SDN within CDNI Request Routing . . . . . . . . . . . . . . . 4
4. Selection of a Downstream CDN with SDN . . . . . . . . . . . . 5
5. Example of Content Request Redirection and Path Setup for
Content Delivery with SDN . . . . . . . . . . . . . . . . . . 6
6. Advantages of using SDN . . . . . . . . . . . . . . . . . . . 7
7. Further Considerations . . . . . . . . . . . . . . . . . . . . 7
8. Security Considerations . . . . . . . . . . . . . . . . . . . 7
9. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 7
10. Informative References . . . . . . . . . . . . . . . . . . . . 7
Author's Address . . . . . . . . . . . . . . . . . . . . . . . . . 9
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1. Introduction
The CDNI PS and framework documents [RFC6707][I-D.ietf-cdni-
framework] define the following four interfaces for CDNI; Request
Routing Interface, Metadata Interface, Logging Interface, and CDNI
Control Interface. As for the Request Routing - Redirection, HTTP and
DNS are being discussed as one of candidate protocols. Recently,
Software-defined networking (SDN) is emerging and intensively
discussed as one of the most promising technologies to provide
centralized, programmable control planes for network service
providers (NSPs). In this sense, SDN could be also considered as one
datatracker.ietf.org