Inter-Area Point-to-Multipoint (P2MP) Segmented Label Switched Paths (LSPs)
RFC 7524

• Status
• IESG evaluation record
• IESG writeups
• Email expansions
• History

• Versions
• 03
• 04
• 05
• 06
• 07
• 08
• 09
• 10
• 11
• 12
• 13
• 14
• 15
• 16
• 17

Internet Engineering Task Force (IETF)                        Y. Rekhter
Request for Comments: 7524                                      E. Rosen
Category: Standards Track                               Juniper Networks
ISSN: 2070-1721                                              R. Aggarwal
                                                                  Arktan
                                                                T. Morin
                                                           I. Grosclaude
                                                                  Orange
                                                              N. Leymann
                                                     Deutsche Telekom AG
                                                                 S. Saad
                                                                    AT&T
                                                                May 2015

                 Inter-Area Point-to-Multipoint (P2MP)
                 Segmented Label Switched Paths (LSPs)

Abstract

   This document describes procedures for building inter-area point-to-
   multipoint (P2MP) segmented service label switched paths (LSPs) by
   partitioning such LSPs into intra-area segments and using BGP as the
   inter-area routing and Label Distribution Protocol (LDP).  Within
   each IGP area, the intra-area segments are either carried over intra-
   area P2MP LSPs, using P2MP LSP hierarchy, or instantiated using
   ingress replication.  The intra-area P2MP LSPs may be signaled using
   P2MP RSVP-TE or P2MP multipoint LDP (mLDP).  If ingress replication
   is used within an IGP area, then (multipoint-to-point) LDP LSPs or
   (point-to-point) RSVP-TE LSPs may be used in the IGP area.  The
   applications/services that use such inter-area service LSPs may be
   BGP Multicast VPN, Virtual Private LAN Service (VPLS) multicast, or
   global table multicast over MPLS.

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/rfc7524.

Rekhter, et al.              Standards Track                    [Page 1]
RFC 7524             Inter-Area P2MP Segmented LSPs             May 2015

Copyright Notice

   Copyright (c) 2015 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.

Rekhter, et al.              Standards Track                    [Page 2]
RFC 7524             Inter-Area P2MP Segmented LSPs             May 2015

Table of Contents

   1. Introduction ....................................................5
   2. Specification of Requirements ...................................5
   3. General Assumptions and Terminology .............................6
   4. Inter-Area P2MP Segmented Next-Hop Extended Community ...........7
   5. Discovering P2MP FEC of Inter-Area P2MP Service LSP .............8
      5.1. BGP MVPN ...................................................8
           5.1.1. Routes Originated by PE or ASBR .....................9
           5.1.2. Routes Re-advertised by PE or ASBR ..................9
           5.1.3. Inter-Area Routes ...................................9
      5.2. LDP VPLS with BGP Auto-discovery or BGP VPLS ..............10
           5.2.1. Routes Originated by PE or ASBR ....................10
           5.2.2. Routes Re-advertised by PE or ASBR .................11
           5.2.3. Inter-Area Routes ..................................11
      5.3. Global Table Multicast over MPLS ..........................12
   6. Egress PE/ASBR Signaling Procedures ............................13
      6.1. Determining the Upstream ABR/PE/ASBR (Upstream Node) ......13
           6.1.1. Upstream Node for MVPN or VPLS .....................13
           6.1.2. Upstream Node for Global Table Multicast ...........14
      6.2. Originating a Leaf A-D Route ..............................15
           6.2.1. Leaf A-D Route for MVPN and VPLS ...................15