Identifier-Locator Network Protocol (ILNP) Engineering Considerations
RFC 6741

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Internet Research Task Force (IRTF)                          RJ Atkinson
Request for Comments: 6741                                    Consultant
Category: Experimental                                         SN Bhatti
ISSN: 2070-1721                                            U. St Andrews
                                                           November 2012

               Identifier-Locator Network Protocol (ILNP)
                       Engineering Considerations

Abstract

   This document describes common (i.e., version independent)
   engineering details for the Identifier-Locator Network Protocol
   (ILNP), which is an experimental, evolutionary enhancement to IP.
   This document is a product of the IRTF Routing Research Group.

Status of This Memo

   This document is not an Internet Standards Track specification; it is
   published for examination, experimental implementation, and
   evaluation.

   This document defines an Experimental Protocol for the Internet
   community.  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/rfc6741.

Atkinson & Bhatti             Experimental                      [Page 1]
RFC 6741                    ILNP Engineering               November 2012

Copyright Notice

   Copyright (c) 2012 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.

   This document may not be modified, and derivative works of it may not
   be created, except to format it for publication as an RFC or to
   translate it into languages other than English.

Table of Contents

   1. Introduction ....................................................3
      1.1. Document Roadmap ...........................................4
      1.2. Terminology ................................................5
   2. ILNP Identifiers ................................................5
      2.1. Syntax .....................................................6
      2.2. Default Values for an Identifier ...........................6
      2.3. Local-Scoped Identifier Values .............................6
      2.4. Multicast Identifiers ......................................7
      2.5. Administration of Identifier Values ........................7
   3. Encoding of Identifiers and Locators for ILNPv6 .................7
      3.1. Encoding of I and L Values .................................7
      3.2. Network-Level Packet Formats ..............................10
      3.3. Encoding of Identifiers and Locators for ILNPv4 ...........11
   4. Transport-Layer Changes ........................................12
      4.1. End-System State ..........................................12
      4.2. TCP/UDP Checksum Handling .................................12
      4.3. ICMP Checksum Handling ....................................12
   5. ILNP Communication Cache (ILCC) ................................13
      5.1. Formal Definition .........................................13
      5.2. Ageing ILCC Entries .......................................15
      5.3. Large Numbers of Locators .................................15
      5.4. Lookups into the ILCC .....................................16
   6. Handling Location/Connectivity Changes .........................16
      6.1. Node Location/Connectivity Changes ........................16
      6.2. Network Connectivity/Locator Changes ......................17
   7. Subnetting .....................................................17
      7.1. Subnetting for ILNPv6 .....................................18
      7.2. Subnetting for ILNPv4 .....................................19
      7.3. Subnetting for Router-Router Links in IPv6/ILNPv6 .........19
   8. DNS Considerations .............................................19

Atkinson & Bhatti             Experimental                      [Page 2]
RFC 6741                    ILNP Engineering               November 2012

      8.1. Secure Dynamic DNS Update .................................19
      8.2. New DNS RR Types ..........................................20