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A SAVI solution for WLAN
draft-bi-savi-wlan-05

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Last updated: 2014-02-06
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Network Working Group                                              J. Bi 
Internet Draft                                                     J. Wu 
Intended status: Standard Tracks                                 Y. Wang 
Expires: August, 2014                                Tsinghua University 
                                                                  T. Lin 
                                            Hangzhou H3C Tech. Co., Ltd. 
                                                        February 6, 2014 
                            
  
                          A SAVI solution for WLAN 

                          draft-bi-savi-wlan-05.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 

   This Internet-Draft is submitted in full conformance with the 
   provisions of BCP 78 and BCP 79. 

   Internet-Drafts are working documents of the Internet Engineering 
   Task Force (IETF).  Note that other groups may also distribute 
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   Drafts is at http://datatracker.ietf.org/drafts/current/. 

   Internet-Drafts are draft documents valid for a maximum of six months 
   and may be updated, replaced, or obsoleted by other documents at any 
   time. It is inappropriate to use Internet-Drafts as reference 
   material or to cite them other than as "work in progress." 

   This Internet-Draft will expire on August 7, 2014. 

Copyright Notice 

   Copyright (c) 2014 IETF Trust and the persons identified as the 
   document authors.  All rights reserved. 

  
  
  
Bi, et al.              Expires August 7, 2014                 [Page 1] 


Internet-Draft                SAVI wlan                   February 2014 
    

   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...................................................2 
   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.....................4 
      3.4. Binding Migration.........................................5 
      3.5. Binding Clearing..........................................5 
   4. Source Address Validation......................................6 
   5. Deployment Scenarios...........................................6 
      5.1. Centralized WLAN..........................................6 
        5.1.1. AP Filtering..........................................7 
          5.1.1.1. Candidate Binding.................................7 
          5.1.1.2. Packet Filtering..................................7 
          5.1.1.3. CAPWAP Extension..................................7 
          5.1.1.4. Mobility Solution.................................9 
        5.1.2. AC Filtering.........................................10 
      5.2. Autonomous WLAN..........................................10 
   6. Security Considerations.......................................10 
   7. IANA Considerations...........................................11 
   8. Acknowledgments...............................................11 
   9. References....................................................11 
      9.1. Normative References.....................................11 
      9.2. Informative References...................................11 
    
1. Introduction 

   This document describes a mechanism to perform per packet IP source 

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