Recommendation for a Routing Architecture
RFC 6115

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Internet Research Task Force (IRTF)                           T. Li, Ed.
Request for Comments: 6115                                 Cisco Systems
Category: Informational                                    February 2011
ISSN: 2070-1721

               Recommendation for a Routing Architecture

Abstract

   It is commonly recognized that the Internet routing and addressing
   architecture is facing challenges in scalability, multihoming, and
   inter-domain traffic engineering.  This document presents, as a
   recommendation of future directions for the IETF, solutions that
   could aid the future scalability of the Internet.  To this end, this
   document surveys many of the proposals that were brought forward for
   discussion in this activity, as well as some of the subsequent
   analysis and the architectural recommendation of the chairs.  This
   document is a product of the Routing Research Group.

Status of This Memo

   This document is not an Internet Standards Track specification; it is
   published for informational purposes.

   This document is a product of the Internet Research Task Force
   (IRTF).  The IRTF publishes the results of Internet-related research
   and development activities.  These results might not be suitable for
   deployment.  This RFC represents the individual opinion(s) of one or
   more members of the Routing Research Group of the Internet Research
   Task Force (IRTF).  Documents approved for publication by the IRSG
   are not a candidate for any level of Internet Standard; see Section 2
   of RFC 5741.

   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/rfc6115.

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RFC 6115                   RRG Recommendation              February 2011

Copyright Notice

   Copyright (c) 2011 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.

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  5
     1.1.  Background to This Document  . . . . . . . . . . . . . . .  5
     1.2.  Areas of Group Consensus . . . . . . . . . . . . . . . . .  6
     1.3.  Abbreviations  . . . . . . . . . . . . . . . . . . . . . .  7
   2.  Locator/ID Separation Protocol (LISP)  . . . . . . . . . . . .  8
     2.1.  Summary  . . . . . . . . . . . . . . . . . . . . . . . . .  8
       2.1.1.  Key Idea . . . . . . . . . . . . . . . . . . . . . . .  8
       2.1.2.  Gains  . . . . . . . . . . . . . . . . . . . . . . . .  9
       2.1.3.  Costs  . . . . . . . . . . . . . . . . . . . . . . . .  9
       2.1.4.  References . . . . . . . . . . . . . . . . . . . . . . 10
     2.2.  Critique . . . . . . . . . . . . . . . . . . . . . . . . . 10
     2.3.  Rebuttal . . . . . . . . . . . . . . . . . . . . . . . . . 11
   3.  Routing Architecture for the Next Generation Internet
       (RANGI)  . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
     3.1.  Summary  . . . . . . . . . . . . . . . . . . . . . . . . . 12
       3.1.1.  Key Idea . . . . . . . . . . . . . . . . . . . . . . . 12
       3.1.2.  Gains  . . . . . . . . . . . . . . . . . . . . . . . . 12
       3.1.3.  Costs  . . . . . . . . . . . . . . . . . . . . . . . . 13
       3.1.4.  References . . . . . . . . . . . . . . . . . . . . . . 13
     3.2.  Critique . . . . . . . . . . . . . . . . . . . . . . . . . 14
     3.3.  Rebuttal . . . . . . . . . . . . . . . . . . . . . . . . . 15
   4.  Internet Vastly Improved Plumbing (Ivip) . . . . . . . . . . . 16
     4.1.  Summary  . . . . . . . . . . . . . . . . . . . . . . . . . 16
       4.1.1.  Key Ideas  . . . . . . . . . . . . . . . . . . . . . . 16
       4.1.2.  Extensions . . . . . . . . . . . . . . . . . . . . . . 17
         4.1.2.1.  TTR Mobility . . . . . . . . . . . . . . . . . . . 17
         4.1.2.2.  Modified Header Forwarding . . . . . . . . . . . . 18
       4.1.3.  Gains  . . . . . . . . . . . . . . . . . . . . . . . . 18
       4.1.4.  Costs  . . . . . . . . . . . . . . . . . . . . . . . . 18
       4.1.5.  References . . . . . . . . . . . . . . . . . . . . . . 19
     4.2.  Critique . . . . . . . . . . . . . . . . . . . . . . . . . 19
     4.3.  Rebuttal . . . . . . . . . . . . . . . . . . . . . . . . . 20
   5.  Hierarchical IPv4 Framework (hIPv4)  . . . . . . . . . . . . . 21
     5.1.  Summary  . . . . . . . . . . . . . . . . . . . . . . . . . 21

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RFC 6115                   RRG Recommendation              February 2011