Simulating "Partial Mesh of MP2MP P-Tunnels" with Ingress Replication
draft-ietf-l3vpn-mvpn-bidir-ingress-replication-00

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Document Type Active Internet-Draft (l3vpn WG)
Last updated 2014-03-04 (latest revision 2014-02-05)
Replaces draft-zzhang-l3vpn-mvpn-bidir-ingress-replication
Replaced by RFC 7740, RFC 7740
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Network Working Group                                              Zhang
Internet-Draft                                                   Rekhter
Updates: 6514 (if approved)                             Juniper Networks
Intended status: Standards Track                                Dolganow
Expires: August 9, 2014                                   Alcatel-Lucent
                                                        February 5, 2014

 Simulating "Partial Mesh of MP2MP P-Tunnels" with Ingress Replication
         draft-ietf-l3vpn-mvpn-bidir-ingress-replication-00.txt

Abstract

   RFC 6513 described a method to support bidirectional C-flow using
   "Partial Mesh of MP2MP P-Tunnels".  This document describes how
   partial mesh of MP2MP P-Tunnels can be simulated with Ingress
   Replication, instead of a real MP2MP tunnel.  This enables a Service
   Provider to use Ingress Replication to offer transparent BIDIR-PIM
   service to its VPN customers.

Status of this Memo

   This Internet-Draft is submitted in full conformance with the
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   This Internet-Draft will expire on August 9, 2014.

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   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
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Zhang, et al.            Expires August 9, 2014                 [Page 1]
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   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 . . . . . . . . . . . . . . . . . . . . . . . . .  3
     1.1.  Terminology  . . . . . . . . . . . . . . . . . . . . . . .  3
   2.  Requirements Language  . . . . . . . . . . . . . . . . . . . .  4
   3.  Operation  . . . . . . . . . . . . . . . . . . . . . . . . . .  5
     3.1.  Control State  . . . . . . . . . . . . . . . . . . . . . .  5
     3.2.  Forwarding State . . . . . . . . . . . . . . . . . . . . .  7
   4.  Security Considerations  . . . . . . . . . . . . . . . . . . .  9
   5.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 10
   6.  Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 11
   7.  Normative References . . . . . . . . . . . . . . . . . . . . . 12
   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 13

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1.  Introduction

   Section 11.2 of RFC 6513, "Partitioned Sets of PEs", describes two
   methods of carrying bidirectional C-flow traffic over a provider core
   without using the core as RPL or requiring Designated Forwarder
   election.

   With these two methods, all PEs of a particular VPN are separated
   into partitions, with each partition being all the PEs that elect the
   same PE as the Upstream PE wrt the C-RPA.  A PE must discard
   bidirectional C-flow traffic from PEs that are not in the same
   partition as the PE itself.

   In particular, Section 11.2.3 of RFC 6513, "Partial Mesh of MP2MP
   P-Tunnels", guarantees the above discard behavior without using an
   extra PE Distinguisher label by having all PEs in the same partition
   join a single MP2MP tunnel dedicated to that partition and use it to
   transmit traffic.  All traffic arriving on the tunnel will be from
   PEs in the same partition, so it will be always accepted.

   RFC 6514 specifies BGP encodings and procedures used to implement
   MVPN as specified in RFC 6513, while the details related to MP2MP
   tunnels are specified in [draft-ietf-l3vpn-mvpn-bidir-05].

   [draft-ietf-l3vpn-mvpn-bidir-05] assumes that an MP2MP P-tunnel is
   realized either via PIM-Bidir, or via MP2MP mLDP.  Each of them would
   require signaling and state not just on PEs, but on the P routers as
   well.  This document describes how the MP2MP tunnel can be simulated
   with a mesh of P2MP tunnels, each of which is instantiated by Ingress
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