Internet Engineering Task Force (IETF) E. Nordmark
Request for Comments: 6620 Cisco Systems
Category: Standards Track M. Bagnulo
ISSN: 2070-1721 UC3M
E. Levy-Abegnoli
Cisco Systems
May 2012
FCFS SAVI: First-Come, First-Served Source Address Validation
Improvement for Locally Assigned IPv6 Addresses
Abstract
This memo describes First-Come, First-Served Source Address
Validation Improvement (FCFS SAVI), a mechanism that provides source
address validation for IPv6 networks using the FCFS principle. The
proposed mechanism is intended to complement ingress filtering
techniques to help detect and prevent source address spoofing.
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 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/rfc6620.
Nordmark, et al. Standards Track [Page 1]RFC 6620 FCFS SAVI May 2012Copyright Notice
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Nordmark, et al. Standards Track [Page 2]RFC 6620 FCFS SAVI May 2012Table of Contents
1. Introduction ....................................................4
1.1. Terminology ................................................4
2. Background to FCFS SAVI .........................................4
2.1. Scope of FCFS SAVI .........................................4
2.2. Constraints for FCFS SAVI Design ...........................5
2.3. Address Ownership Proof ....................................5
2.4. Binding Anchor Considerations ..............................6
2.5. FCFS SAVI Protection Perimeter .............................6
2.6. Special Cases .............................................10
3. FCFS SAVI Specification ........................................11
3.1. FCFS SAVI Data Structures .................................12
3.2. FCFS SAVI Algorithm .......................................12
3.2.1. Discovering On-Link Prefixes .......................12
3.2.2. Processing of Transit Traffic ......................13
3.2.3. Processing of Local Traffic ........................13
3.2.4. FCFS SAVI Port Configuration Guidelines ............21
3.2.5. VLAN Support .......................................22
3.3. Default Protocol Values ...................................22
4. Security Considerations ........................................22
4.1. Denial-of-Service Attacks .................................22
4.2. Residual Threats ..........................................23
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