datatracker.ietf.org
Sign in
Version 5.7.4, 2014-11-12
Report a bug

An Interface Identifier (ID) Hello Option for PIM
RFC 6395

Internet Engineering Task Force (IETF)                      S. Gulrajani
Request for Comments: 6395                                     S. Venaas
Category: Standards Track                                  Cisco Systems
ISSN: 2070-1721                                             October 2011

           An Interface Identifier (ID) Hello Option for PIM

Abstract

   This document defines a new PIM Hello option to advertise an
   Interface Identifier that can be used by PIM protocols to uniquely
   identify an interface of a neighboring router.

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/rfc6395.

Copyright Notice

   Copyright (c) 2011 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.

Gulrajani & Venaas           Standards Track                    [Page 1]
RFC 6395          An Interface ID Hello Option for PIM      October 2011

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . . . 2
     1.1.  Requirements Notation . . . . . . . . . . . . . . . . . . . 2
   2.  Interface Identifier Option . . . . . . . . . . . . . . . . . . 2
     2.1.  Local Interface Identifier  . . . . . . . . . . . . . . . . 3
     2.2.  Router Identifier . . . . . . . . . . . . . . . . . . . . . 3
   3.  Message Format  . . . . . . . . . . . . . . . . . . . . . . . . 4
   4.  Security Considerations . . . . . . . . . . . . . . . . . . . . 4
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 5
   6.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . 5
   7.  References  . . . . . . . . . . . . . . . . . . . . . . . . . . 5
     7.1.  Normative References  . . . . . . . . . . . . . . . . . . . 5
     7.2.  Informative References  . . . . . . . . . . . . . . . . . . 5

1.  Introduction

   This document defines a new option for use in PIM Hello messages
   [RFC4601] to carry an Interface Identifier.  A router generates
   identifiers for each of its PIM-enabled interfaces such that each
   interface has a different identifier.  The identifiers can optionally
   be generated such that they are unique within, e.g., an
   administrative domain.

   An example where this Interface Identifier can be used is with PIM
   over Reliable Transport (PORT) [PIM-PORT], where a single Transport
   connection is used between two routers that have multiple interfaces
   connecting them.  If these interfaces have unnumbered or IPv6 link-
   local addresses, the Interface Identifier included in the PORT Join/
   Prune message will identify with which interface the message is
   associated.  For PORT, the Router Identifier is not needed, and it
   can be set to zero.

   All multi-byte integers in this specification are transmitted in
   network byte order (i.e., most significant byte first).

1.1.  Requirements Notation

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in [RFC2119].

2.  Interface Identifier Option

   The Interface Identifier option is used to identify the interface of
   a neighboring router through which a PIM Hello [RFC4601] was sent.
   This allows PIM protocols to refer to, or identify, a particular
   interface on a neighboring router.

Gulrajani & Venaas           Standards Track                    [Page 2]
RFC 6395          An Interface ID Hello Option for PIM      October 2011

   The Interface Identifier option need only be included in PIM Hello

[include full document text]