Network Working Group J. Bi
Internet Draft J. Wu
Intended status: Standard Tracks Y. Wang
Expires: August, 2013 Tsinghua University
T. Lin
Hangzhou H3C Tech. Co., Ltd.
February 6, 2013
A SAVI solution for WLAN
draft-bi-savi-wlan-03.txt
Abstract
This document describes a source address validation solution for WLAN
enabling 802.11i or other security mechanisms. This mechanism snoops
NDP and DHCP to bind IP address with 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 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 October 5, 2012.
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document authors. All rights reserved.
Bi, et al. Expires August 6, 2013 [Page 1]
Internet-Draft SAVI wlan February 2013
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Table of Contents
1. Introduction ................................................ 3
2. Conventions used in this document............................ 3
3. IP-MAC Binding .............................................. 3
3.1. Data Structures......................................... 4
3.1.1. IP-MAC Mapping Table............................... 4
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......................................... 6
5.1. Centralized WLAN........................................ 7
5.1.1. AP Filtering....................................... 7
5.1.1.1. Candidate Binding............................. 7
5.1.1.2. CAPWAP Extension.............................. 8
5.1.1.3. Mobility Solution............................. 9
5.1.2. AC Filtering...................................... 10
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