Source Address Validation Improvement (SAVI) for Mixed Address Assignment Methods Scenario
RFC 8074
Document | Type |
RFC - Proposed Standard
(February 2017; No errata)
Was draft-ietf-savi-mix (savi WG)
|
|
---|---|---|---|
Authors | Jun Bi , Guang Yao , Joel Halpern , Eric Levy-Abegnoli | ||
Last updated | 2017-02-17 | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized bibtex | ||
Reviews | |||
Stream | WG state | Submitted to IESG for Publication | |
Document shepherd | Jean-Michel Combes | ||
Shepherd write-up | Show (last changed 2016-06-12) | ||
IESG | IESG state | RFC 8074 (Proposed Standard) | |
Consensus Boilerplate | Yes | ||
Telechat date | |||
Responsible AD | Suresh Krishnan | ||
Send notices to | (None) | ||
IANA | IANA review state | Version Changed - Review Needed | |
IANA action state | No IANA Actions |
Internet Engineering Task Force (IETF) J. Bi Request for Comments: 8074 Tsinghua University Category: Standards Track G. Yao ISSN: 2070-1721 Tsinghua University/Baidu J. Halpern Ericsson E. Levy-Abegnoli, Ed. Cisco February 2017 Source Address Validation Improvement (SAVI) for Mixed Address Assignment Methods Scenario Abstract In networks that use multiple techniques for address assignment, the spoofing of addresses assigned by each technique can be prevented using the appropriate Source Address Validation Improvement (SAVI) methods. This document reviews how multiple SAVI methods can coexist in a single SAVI device and how collisions are resolved when the same binding entry is discovered by two or more methods. Status of This Memo This is an Internet Standards Track document. 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). Further information on Internet Standards is available in Section 2 of RFC 7841. 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/rfc8074. Bi, et al. Standards Track [Page 1] RFC 8074 SAVI-MIX February 2017 Copyright Notice Copyright (c) 2017 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. Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3 2. Requirements Language . . . . . . . . . . . . . . . . . . . . 3 3. Problem Scope . . . . . . . . . . . . . . . . . . . . . . . . 3 4. Architecture . . . . . . . . . . . . . . . . . . . . . . . . 4 5. Recommendations for Assignment Separation . . . . . . . . . . 6 6. Resolving Binding Collisions . . . . . . . . . . . . . . . . 6 6.1. Same Address on Different Binding Anchors . . . . . . . . 6 6.1.1. Basic Preference . . . . . . . . . . . . . . . . . . 7 6.1.2. Exceptions . . . . . . . . . . . . . . . . . . . . . 7 6.1.3. Multiple SAVI Device Scenario . . . . . . . . . . . . 8 6.2. Same Address on the Same Binding Anchor . . . . . . . . . 9 7. Security Considerations . . . . . . . . . . . . . . . . . . . 9 8. Privacy Considerations . . . . . . . . . . . . . . . . . . . 9 9. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 9 10. References . . . . . . . . . . . . . . . . . . . . . . . . . 10 10.1. Normative References . . . . . . . . . . . . . . . . . . 10 10.2. Informative References . . . . . . . . . . . . . . . . . 11 Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . . 11 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 12 Bi, et al. Standards Track [Page 2] RFC 8074 SAVI-MIX February 2017 1. Introduction There are currently several Source Address Validation Improvement (SAVI) documents ([RFC6620], [RFC7513], and [RFC7219]) that describe the different methods by which a switch can discover and record bindings between a node's IP address and a binding anchor and use that binding to perform source address validation. Each of these documents specifies how to learn on-link addresses, based on the technique used for their assignment: StateLess Address Autoconfiguration (SLAAC), the Dynamic Host Control Protocol (DHCP), and Secure Neighbor Discovery (SEND), respectively. Each of these documents describes separately how one particular SAVI method deals with address collisions (same address but different binding anchor). While multiple IP assignment techniques can be used in the same layerShow full document text