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Authentication and Confidentiality in Protocol Independent Multicast Sparse Mode (PIM-SM) Link-Local Messages
RFC 5796

Internet Engineering Task Force (IETF)                         W. Atwood
Request for Comments: 5796                      Concordia University/CSE
Updates: 4601                                                   S. Islam
Category: Standards Track                                        IRS-EMT
ISSN: 2070-1721                                                 M. Siami
                                              Concordia University/CIISE
                                                              March 2010

                 Authentication and Confidentiality in
Protocol Independent Multicast Sparse Mode (PIM-SM) Link-Local Messages

Abstract

   RFC 4601 mandates the use of IPsec to ensure authentication of the
   link-local messages in the Protocol Independent Multicast - Sparse
   Mode (PIM-SM) routing protocol.  This document specifies mechanisms
   to authenticate the PIM-SM link-local messages using the IP security
   (IPsec) Encapsulating Security Payload (ESP) or (optionally) the
   Authentication Header (AH).  It specifies optional mechanisms to
   provide confidentiality using the ESP.  Manual keying is specified as
   the mandatory and default group key management solution.  To deal
   with issues of scalability and security that exist with manual
   keying, optional support for an automated group key management
   mechanism is provided.  However, the procedures for implementing
   automated group key management are left to other documents.  This
   document updates RFC 4601.

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/rfc5796.

Atwood, et al.               Standards Track                    [Page 1]
RFC 5796               PIM-SM Link-local Security             March 2010

Copyright Notice

   Copyright (c) 2010 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.

Atwood, et al.               Standards Track                    [Page 2]
RFC 5796               PIM-SM Link-local Security             March 2010

Table of Contents

   1. Introduction ....................................................4
      1.1. Goals and Non-Goals ........................................4
   2. Terminology .....................................................5
   3. Transport Mode versus Tunnel Mode ...............................5
   4. Authentication ..................................................5
   5. Confidentiality .................................................6
   6. IPsec Requirements ..............................................6
   7. Key Management ..................................................8
      7.1. Manual Key Management ......................................8
      7.2. Automated Key Management ...................................8
      7.3. Communications Patterns ....................................9
      7.4. Neighbor Relationships ....................................10
   8. Number of Security Associations ................................11
   9. Rekeying .......................................................12
      9.1. Manual Rekeying Procedure .................................13
      9.2. KeyRolloverInterval .......................................14
      9.3. Rekeying Interval .........................................14
   10. IPsec Protection Barrier and SPD/GSPD .........................14
      10.1. Manual Keying ............................................14
           10.1.1. SAD Entries .......................................14
           10.1.2. SPD Entries .......................................14
      10.2. Automatic Keying .........................................15
           10.2.1. SAD Entries .......................................15
           10.2.2. GSPD Entries ......................................15

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