Extensions to Resource Reservation Protocol - Traffic Engineering (RSVP-TE) for Hub and Spoke Multipoint Label Switched Paths (LSPs)
draft-jjb-mpls-rsvp-te-hsmp-lsp-02

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MPLS Working Group                                                L. Jin
Internet-Draft                                           ZTE Corporation
Intended status: Standards Track                               F. Jounay
Expires: July 15, 2013                                    France Telecom
                                                               M. Bhatia
                                                          Alcatel-Lucent
                                                        January 11, 2013

   Extensions to Resource Reservation Protocol - Traffic Engineering
   (RSVP-TE) for Hub and Spoke Multipoint Label Switched Paths (LSPs)
                   draft-jjb-mpls-rsvp-te-hsmp-lsp-02

Abstract

   In Multiprotocol Label Switching (MPLS) and Generalized MPLS (GMPLS)
   environment, the RSVP-TE based Point-to-Multipoint (P2MP) LSP allows
   traffic to transmit from root to leaf node, but there is no co-routed
   reverse path for traffic from leaf to root node.  This draft
   introduces a Hub and Spoke Multipoint (HSMP) LSP, which allows
   traffic from both the root to the leaves through a P2MP LSP and also
   the leaves to the root along a co-routed reverse path.

Status of this Memo

   This Internet-Draft is submitted in full conformance with the
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   This Internet-Draft will expire on July 15, 2013.

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   Copyright (c) 2013 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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   (http://trustee.ietf.org/license-info) in effect on the date of

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Table of Contents

   1.  Application  . . . . . . . . . . . . . . . . . . . . . . . . .  3
     1.1.  Time Synchronization . . . . . . . . . . . . . . . . . . .  3
     1.2.  Virtual Private Multicast Service  . . . . . . . . . . . .  3
   2.  Comparing Hub-Spoke MP LSP with P2MP and Unidirectional
       Reverse LSP  . . . . . . . . . . . . . . . . . . . . . . . . .  4
     2.1.  Number of Path and Resv State Blocks . . . . . . . . . . .  4
     2.2.  Hardware Programming and Label Utilization . . . . . . . .  5
     2.3.  RSVP Control Traffic . . . . . . . . . . . . . . . . . . .  6
   3.  Setting up a Hub and Spoke Multipoint LSP with RSVP-TE . . . .  6
     3.1.  Hub and Spoke Multipoint LSP and Path Messages . . . . . .  6
     3.2.  Procedures for Hub and Spoke Multipoint LSP  . . . . . . .  6
     3.3.  Symmetric Bandwidth Allocation . . . . . . . . . . . . . .  7
     3.4.  Asymmetric bandwidth allocation  . . . . . . . . . . . . .  7
       3.4.1.  Packet Format  . . . . . . . . . . . . . . . . . . . .  8
       3.4.2.  UPSTREAM_FLOWSPEC processing . . . . . . . . . . . . .  9
       3.4.3.  UPSTREAM_TSPEC and UPSTREAM_ADSPEC processing  . . . .  9
   4.  Setting up the Hub Spoke Multipoint  LSP . . . . . . . . . . .  9
   5.  Grafting . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
   6.  Pruning  . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
   7.  Refresh Reduction  . . . . . . . . . . . . . . . . . . . . . . 12
   8.  Fast Reroute . . . . . . . . . . . . . . . . . . . . . . . . . 12
   9.  Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 13
   10. Security Considerations  . . . . . . . . . . . . . . . . . . . 13
   11. IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 13
   12. References . . . . . . . . . . . . . . . . . . . . . . . . . . 13
     12.1. Normative References . . . . . . . . . . . . . . . . . . . 13
     12.2. Informative References . . . . . . . . . . . . . . . . . . 13
   Appendix 1.  Appendix: Alternate Mechanism to set up a reverse
                LSP . . . . . . . . . . . . . . . . . . . . . . . . . 14
   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 14

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