Population Count Extensions to PIM
draft-ietf-pim-pop-count-06

The information below is for an old version of the document
Document Type Active Internet-Draft (pim WG)
Last updated 2012-07-14 (latest revision 2012-04-10)
Replaces draft-farinacci-pim-pop-count
Stream IETF
Intended RFC status Experimental
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IESG note Mike McBride (mmcbride7@gmail.com) is the document shepherd.
Send notices to pim-chairs@tools.ietf.org, draft-ietf-pim-pop-count@tools.ietf.org
Network Working Group                                     Dino Farinacci
Internet-Draft                                             Greg Shepherd
Intended status: Experimental                                Stig Venaas
Expires: October 13, 2012                                  Cisco Systems
                                                               Yiqun Cai
                                                               Microsoft
                                                          April 11, 2012

                   Population Count Extensions to PIM
                    draft-ietf-pim-pop-count-06.txt

Abstract

   This specification defines a method for providing multicast
   distribution-tree accounting data.  Simple extensions to the PIM
   protocol allow a rough approximation of tree-based data in a scalable
   fashion.

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
   working documents as Internet-Drafts.  The list of current Internet-
   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 October 13, 2012.

Copyright Notice

   Copyright (c) 2012 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

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   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  3
     1.1.  Requirements Notation  . . . . . . . . . . . . . . . . . .  3
     1.2.  Terminology  . . . . . . . . . . . . . . . . . . . . . . .  4
   2.  Pop-Count-Supported Hello Option . . . . . . . . . . . . . . .  5
   3.  New Pop-Count Join Attribute Format  . . . . . . . . . . . . .  6
     3.1.  Options  . . . . . . . . . . . . . . . . . . . . . . . . .  9
       3.1.1.  Link Speed Encoding  . . . . . . . . . . . . . . . . . 10
     3.2.  Example message layouts  . . . . . . . . . . . . . . . . . 11
   4.  How to use Pop-Count Encoding  . . . . . . . . . . . . . . . . 13
   5.  Implementation Approaches  . . . . . . . . . . . . . . . . . . 14
   6.  Caveats  . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
   7.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 16
   8.  Security Considerations  . . . . . . . . . . . . . . . . . . . 17
   9.  Acknowledgments  . . . . . . . . . . . . . . . . . . . . . . . 18
   10. References . . . . . . . . . . . . . . . . . . . . . . . . . . 19
     10.1. Normative References . . . . . . . . . . . . . . . . . . . 19
     10.2. Informative References . . . . . . . . . . . . . . . . . . 19
   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 20

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1.  Introduction

   This document specifies a mechanism to convey accounting information
   using the PIM protocol [RFC4601] [RFC5015].  Putting the mechanism in
   PIM allows efficient distribution and maintenance of such accounting
   information.  Previous mechanisms require data to be correlated from
   multiple router sources.

   This mechanism allows a single router to be queried to obtain
   accounting and statistic information for a multicast distribution
   tree as a whole or any distribution sub-tree downstream from a
   queried router.  The amount of information is fixed and does not
   increase as multicast membership, tree diameter, or branching
   increase.

   The sort of accounting data this specification provides, on a per
   multicast route basis, are:

   1.  The number of branches in a distribution tree.

   2.  The membership type of the distribution tree, that is SSM or ASM.
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