A SAVI Solution for WLAN
draft-bi-savi-wlan-20
Network Working Group J. Bi
Internet-Draft J. Wu
Intended status: Standards Track Y. Wang
Expires: May 14, 2021 Tsinghua University
T. Lin
New H3C Technologies Co. Ltd
Nov 14, 2020
A SAVI Solution for WLAN
draft-bi-savi-wlan-20
Abstract
This document describes a source address validation solution for WLAN
enabling 802.11i or other security mechanisms. This mechanism snoops
NDP and DHCP packets to bind IP address to MAC address, and relies on
the security of MAC address guaranteed by 802.11i or other mechanisms
to filter IP spoofing packets. It can work in the special situations
described in the charter of SAVI(Source Address Validation
Improvements) workgroup, such as multiple MAC addresses on one
interface. This document describes three different deployment
scenarios, with solutions for migration of binding entries when hosts
move from one access point to another.
Status of This Memo
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This Internet-Draft will expire on May 14, 2021.
Copyright Notice
Copyright (c) 2020 IETF Trust and the persons identified as the
document authors. All rights reserved.
Bi, et al. Expires May 14, 2021 [Page 1]
Internet-Draft A SAVI Solution for WLAN Nov 2020
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1. Terminology . . . . . . . . . . . . . . . . . . . . . . . 3
2. Conventions used in this document . . . . . . . . . . . . . . 3
3. IP-MAC Binding . . . . . . . . . . . . . . . . . . . . . . . 3
3.1. Data Structures . . . . . . . . . . . . . . . . . . . . . 3
3.1.1. IP-MAC Mapping Table . . . . . . . . . . . . . . . . 3
3.1.2. MAC-IP Mapping Table . . . . . . . . . . . . . . . . 4
3.2. Pre-conditions for binding . . . . . . . . . . . . . . . 4
3.3. Binding IP addresses to MAC addresses . . . . . . . . . . 5
3.4. Binding Migration . . . . . . . . . . . . . . . . . . . . 5
3.5. Binding Clearing . . . . . . . . . . . . . . . . . . . . 6
4. Source Address Validation . . . . . . . . . . . . . . . . . . 6
5. Deployment Scenarios . . . . . . . . . . . . . . . . . . . . 7
5.1. Centralized WLAN . . . . . . . . . . . . . . . . . . . . 7
5.1.1. AP Filtering . . . . . . . . . . . . . . . . . . . . 7
5.1.2. AC Filtering . . . . . . . . . . . . . . . . . . . . 12
5.2. Autonomous WLAN . . . . . . . . . . . . . . . . . . . . . 12
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 13
7. Security Considerations . . . . . . . . . . . . . . . . . . . 13
7.1. Issues with Triggerring Establishment of Binding Entries
by Data Packets . . . . . . . . . . . . . . . . . . . . . 13
7.2. Privacy Considerations . . . . . . . . . . . . . . . . . 13
8. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 14
9. References . . . . . . . . . . . . . . . . . . . . . . . . . 14
9.1. Normative References . . . . . . . . . . . . . . . . . . 14
9.2. Informative References . . . . . . . . . . . . . . . . . 15
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 15
1. Introduction
This document describes a mechanism to perform per packet IP source
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