MVPN/EVPN Segmentated Forwarding Options
draft-zzhang-bess-mvpn-evpn-segmented-forwarding-00

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Last updated 2018-12-20
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BESS                                                            Z. Zhang
Internet-Draft                                          Juniper Networks
Updates: 6513, 6514, 7524 (if approved)                           J. Xie
Intended status: Standards Track                                  Huawei
Expires: June 23, 2019                                 December 20, 2018

                MVPN/EVPN Segmentated Forwarding Options
          draft-zzhang-bess-mvpn-evpn-segmented-forwarding-00

Abstract

   [RFC6513] and [RFC6514] specify MVPN Inter-AS Segmentation
   procedures.  [RFC7524] specifies MVPN Inter-Area Segmentation
   procedures.  [I-D.ietf-bess-evpn-bum-procedure-updates] specifies
   EVPN BUM Inter-Region Segmentation Procedures.  Several other
   documents also touch upon the segmentation topic.  The forwarding at
   the segmentation points has been assumed to be label switching,
   subject to certain limitations.  The purpose of this document is to
   provide a review of segmentation points' available forwarding options
   and limitations, and to clarify and expand some procedures.

Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in [RFC2119].

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 https://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
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   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 June 23, 2019.

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Copyright Notice

   Copyright (c) 2018 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
   (https://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.

Table of Contents

   1.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     2.1.  MPLS Label Switching at Segmentation Points . . . . . . .   3
     2.2.  IP Processing at Segmentation Points  . . . . . . . . . .   5
   3.  Specifications  . . . . . . . . . . . . . . . . . . . . . . .   6
   4.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   6
     4.1.  Normative References  . . . . . . . . . . . . . . . . . .   6
     4.2.  Informative References  . . . . . . . . . . . . . . . . .   7
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   8

1.  Terminology

   This document uses terminology from MVPN and EVPN.  It is expected
   that the audience is familiar with the concepts and procedures
   defined in [RFC6513], [RFC6514], [RFC7524], [RFC7432], [I-D.ietf-
   bess-evpn-bum-procedure-updates], and [I-D.ietf-bess-evpn-igmp-mld-
   proxy].  Some terms are listed below for references.

   o  PMSI: P-Multicast Service Interface - a conceptual interface for a
      PE to send customer multicast traffic to all or some PEs in the
      same VPN.  A PMSI A-D route is a BGP MVPN/EVPN auto-discovery
      route that announces the PMSI and optionally the tunnel that
      instantiates the PMSI.

   o  I-PMSI: Inclusive PMSI - to all PEs in the same VPN.

   o  S-PMSI: Selective PMSI - to some of the PEs in the same VPN.

   o  Leaf A-D routes: For explicit leaf tracking purpose.  Triggered by
      S-PMSI A-D routes and targeted at triggering route's originator.

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   o  IMET A-D route: Inclusive Multicast Ethernet Tag A-D route.  The
      EVPN equivalent of MVPN Intra-AS I-PMSI A-D route.

   o  SMET A-D route: Selective Multicast Ethernet Tag A-D route.  The
      EVPN equivalent of MVPN Leaf A-D route but unsolicited and
      untargeted.

2.  Introduction

   [RFC6513] and [RFC6514] specify MVPN Inter-AS Segmentation
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