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Using Only Link-Local Addressing inside an IPv6 Network (RFC7404)

IP.com Disclosure Number: IPCOM000239561D
Original Publication Date: 2014-Nov-01
Included in the Prior Art Database: 2014-Nov-15
Document File: 20 page(s) / 24K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

M. Behringer: AUTHOR [+2]

Abstract

An infrastructure link between a set of routers typically does not require global or unique local addresses [RFC4193]. Using only link- local addressing on such links has a number of advantages; for example, routing tables do not need to carry link addressing and can therefore be significantly smaller. This helps to decrease failover times in certain routing convergence events. An interface of a router is also not reachable beyond the link boundaries, therefore reducing the attack surface.

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Internet Engineering Task Force (IETF)                      M. Behringer Request for Comments: 7404                                     E. Vyncke Category: Informational                                            Cisco ISSN: 2070-1721                                            November 2014

         Using Only Link-Local Addressing inside an IPv6 Network

Abstract

   In an IPv6 network, it is possible to use only link-local addresses    on infrastructure links between routers.  This document discusses the    advantages and disadvantages of this approach to facilitate the    decision process for a given network.

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 Engineering Task Force    (IETF).  It represents the consensus of the IETF community.  It has    received public review and has been approved for publication by the    Internet Engineering Steering Group (IESG).  Not all documents    approved by the IESG are 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/rfc7404.

Copyright Notice

   Copyright (c) 2014 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.  Code Components extracted from this document must    include Simplified BSD License text as described in Section 4.e of    the Trust Legal Provisions and are provided without warranty as    described in the Simplified BSD License.

 Behringer & Vyncke            Informational                     [Page 1]
 RFC 7404                     Link-Local Only               November 2014

 Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2    2.  Using Link-Local Addressing on Infrastructure Links . . . . .   2      2.1.  The Approach  . . . . . . . . . . . . . . . . . . . . . .   3      2.2.  Advantages  . . . . . . . . . . . . . . . . . . . . . . .   4      2.3.  Caveats . . . . . . . . . . . . . . . . . . . . . . . . .   5      2.4.  Internet Exchange Points  . . . . . . . . . . . . . . . .   6      2.5.  Summary . . . . . . . . . . . . . ....