Source Address Validation Improvement (SAVI) Framework
RFC 7039

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Internet Engineering Task Force (IETF)                             J. Wu
Request for Comments: 7039                                         J. Bi
Category: Informational                                   Tsinghua Univ.
ISSN: 2070-1721                                               M. Bagnulo
                                                                    UC3M
                                                                F. Baker
                                                                   Cisco
                                                            C. Vogt, Ed.
                                                            October 2013

         Source Address Validation Improvement (SAVI) Framework

Abstract

   Source Address Validation Improvement (SAVI) methods were developed
   to prevent nodes attached to the same IP link from spoofing each
   other's IP addresses, so as to complement ingress filtering with
   finer-grained, standardized IP source address validation.  This
   document is a framework document that describes and motivates the
   design of the SAVI methods.  Particular SAVI methods are described in
   other documents.

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/rfc7039.

Wu, et al.                    Informational                     [Page 1]
RFC 7039                     SAVI Framework                 October 2013

Copyright Notice

   Copyright (c) 2013 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
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   described in the Simplified BSD License.

   This document may contain material from IETF Documents or IETF
   Contributions published or made publicly available before November
   10, 2008.  The person(s) controlling the copyright in some of this
   material may not have granted the IETF Trust the right to allow
   modifications of such material outside the IETF Standards Process.
   Without obtaining an adequate license from the person(s) controlling
   the copyright in such materials, this document may not be modified
   outside the IETF Standards Process, and derivative works of it may
   not be created outside the IETF Standards Process, except to format
   it for publication as an RFC or to translate it into languages other
   than English.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Model . . . . . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Deployment Options  . . . . . . . . . . . . . . . . . . . . .   5
     3.1.  IP Address Assignment Methods . . . . . . . . . . . . . .   6
     3.2.  Binding Anchors . . . . . . . . . . . . . . . . . . . . .   6
   4.  Scalability Optimizations . . . . . . . . . . . . . . . . . .   7
   5.  Reliability Optimizations . . . . . . . . . . . . . . . . . .   9
   6.  Scenario with Multiple Assignment Methods . . . . . . . . . .  10
   7.  Prefix Configuration  . . . . . . . . . . . . . . . . . . . .  10
   8.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .  11
   9.  Security Considerations . . . . . . . . . . . . . . . . . . .  11
   10. References  . . . . . . . . . . . . . . . . . . . . . . . . .  12
     10.1.  Normative References . . . . . . . . . . . . . . . . . .  12
     10.2.  Informative References . . . . . . . . . . . . . . . . .  12

Wu, et al.                    Informational                     [Page 2]
RFC 7039                     SAVI Framework                 October 2013

1.  Introduction

   Since IP source addresses are used by hosts and network entities to
   determine the origin of a packet and as a destination for return
   data, spoofing of IP source addresses can enable impersonation,
   concealment, and malicious traffic redirection.  Unfortunately, the
   Internet architecture does not prevent IP source address spoofing