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           ®..