PIM Join Attributes for LISP Environments
draft-ietf-pim-join-attributes-for-lisp-03

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Document Type Active Internet-Draft (pim WG)
Last updated 2016-05-20
Replaces draft-arango-pim-join-attributes-for-lisp
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Network Working Group                                          J. Arango
Internet-Draft                                                 S. Venaas
Intended status: Experimental                              Cisco Systems
Expires: November 21, 2016                                   I. Kouvelas
                                                    Arista Networks Inc.
                                                            May 20, 2016

               PIM Join Attributes for LISP Environments
             draft-ietf-pim-join-attributes-for-lisp-03.txt

Abstract

   This document defines two PIM Join/Prune attributes that support the
   construction of multicast distribution trees where the root and
   receivers are located in different LISP sites.  These attributes
   allow the receiver site to select between unicast and multicast
   transport and to convey the receiver RLOC address to the control
   plane of the root xTR.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
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   This Internet-Draft will expire on November 21, 2016.

Copyright Notice

   Copyright (c) 2016 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
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Internet-Draft  PIM Join Attributes for LISP Environments       May 2016

   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.  Requirements Notation . . . . . . . . . . . . . . . . . . . .   3
   3.  PIM Join/Prune Attributes . . . . . . . . . . . . . . . . . .   3
   4.  The Transport Attribute . . . . . . . . . . . . . . . . . . .   3
     4.1.  Transport Attribute Format  . . . . . . . . . . . . . . .   4
     4.2.  Using the Transport Attribute . . . . . . . . . . . . . .   4
   5.  Receiver RLOC Attribute . . . . . . . . . . . . . . . . . . .   4
     5.1.  Receiver RLOC Attribute Format  . . . . . . . . . . . . .   5
     5.2.  Using the Receiver RLOC Attribute . . . . . . . . . . . .   6
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .   6
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   6
   8.  Normative References  . . . . . . . . . . . . . . . . . . . .   6
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   7

1.  Introduction

   The construction of multicast distribution trees where the root and
   receivers are located in different LISP sites [RFC6830] is defined in
   [RFC6831].  Creation of (root-EID,G) state in the root site requires
   that unicast LISP-encapsulated Join/Prune messages be sent from an
   xTR on the receiver site to an xTR on the root site.

   [RFC6831] specifies that (root-EID,G) data packets are to be LISP-
   encapsulated into (root-RLOC,G) multicast packets.  However, a wide
   deployment of multicast connectivity between LISP sites is unlikely
   to happen any time soon.  In fact, some implementations are initially
   focusing on unicast transport with head-end replication between root
   and receiver sites.

   The unicast LISP-encapsulated Join/Prune message specifies the (root-
   EID,G) state that needs to be established in the root site, but
   conveys nothing about the receivers capability or desire to use
   multicast as the underlying transport.  This document specifies a
   Join/Prune attribute that allows the receiver to select the desired
   transport.

   Knowledge of the receiver RLOC is also essential to the control plane
   of the root xTR.  It determines the downstream destination for
   unicast head-end replication and identifies the receiver xTR that
   needs to be notified should the root of the distribution tree move to
   another site.

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