Browse Prior Art Database

Known Content Network (CN) Request-Routing Mechanisms (RFC3568)

IP.com Disclosure Number: IPCOM000016843D
Original Publication Date: 2003-Jul-01
Included in the Prior Art Database: 2003-Jul-18
Document File: 20 page(s) / 42K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

A. Barbir: AUTHOR [+4]

Abstract

This document presents a summary of Request-Routing techniques that are used to direct client requests to surrogates based on various policies and a possible set of metrics. The document covers techniques that were commonly used in the industry on or before December 2000. In this memo, the term Request-Routing represents techniques that is commonly called content routing or content redirection. In principle, Request-Routing techniques can be classified under: DNS Request-Routing, Transport-layer Request-Routing, and Application-layer Request-Routing.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 7% of the total text.

Network Working Group� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � A. Barbir

Request for Comments: 3568� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � Nortel Networks

Category: Informational� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � B. Cain

� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � Storigen Systems

� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � R. Nair

� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � Consultant

� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � O. Spatscheck

� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � AT&T

� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � July 2003

� � � � � � � � Known Content Network (CN) Request-Routing Mechanisms

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

� � This document presents a summary of Request-Routing techniques that

� � are used to direct client requests to surrogates based on various

� � policies and a possible set of metrics.� The document covers

� � techniques that were commonly used in the industry on or before

� � December 2000.� In this memo, the term Request-Routing represents

� � techniques that is commonly called content routing or content

� � redirection.� In principle, Request-Routing techniques can be

� � classified under: DNS Request-Routing, Transport-layer

� � Request-Routing, and Application-layer Request-Routing.

Table of Contents

� � 1.� Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2

� � 2.� DNS based Request-Routing Mechanisms . . . . . . . . . . . . 3

� � � � � � 2.1.� Single Reply . . . . . . . . . . . . . . . . . . . . . 3

� � � � � � 2.2.� Multiple Replies . . . . . . . . . . . . . . . . . . . 3

� � � � � � 2.3.� Multi-Level Resolution . . . . . . . . . . . . . . . . 4

� � � � � � � � � � � � 2.3.1.� NS Redirection . . . . . . . . . . . . . . . . 4

� � � � � � � � � � � � 2.3.2.� CNAME Redirection. . . . . . . . . . . . . . . 5

� � � � � � 2.4.� Anycast. . . . . . . . . . . . . . . . . . . . . . . . 5

� � � � � � 2.5.� Object Encoding. . . . . . . . . . . . . . . . . . . . 6

� � � � � � 2.6.� DNS Request-Routing Limitations. . . . . . . . . . . . 6

� � 3.� Transport-Layer Request-Routing� . . . . . . . . . . . . . . 7

Barbir, et al.� � � � � � � � � � � � � � Informational� � � � � � � � � � � �...