Extended Procedures for EVPN Optimized Ingress Replication
draft-wsv-bess-extended-evpn-optimized-ir-00

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Last updated 2018-09-04
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BESS                                                         W. Lin, Ed.
Internet-Draft                                                S. Sivaraj
Intended status: Standards Track                                 V. Garg
Expires: March 8, 2019                            Juniper Networks, Inc.
                                                              J. Rabadan
                                                                   Nokia
                                                       September 4, 2018

       Extended Procedures for EVPN Optimized Ingress Replication
              draft-wsv-bess-extended-evpn-optimized-ir-00

Abstract

   [EVPN-AR] specifies an optimized ingress replication solution for
   more efficient multicast and broadcast delivery in a Network
   Virtualization Overlay (NVO) network for EVPN.

   This document extends the optimized ingress replication procedures
   specified in [EVPN-AR] to overcome the limitation that an AR-
   REPLICATOR may have.  An AR-REPLICATOR may be unable to retain the
   source IP address or include the expected ESI label that is required
   for EVPN split horizon filtering when replicating the packet on
   behalf of its multihomed AR-LEAF.  Under this circumstance, the
   extended procedures specified in this document allows the support of
   EVPN multihoming on the AR-LEAFs as well as optimized ingress
   replication for the rest of the EVPN overlay network.

Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
   "OPTIONAL" in this document are to be interpreted as described in BCP
   14 [RFC2119] [RFC8174] when, and only when, they appear in all
   capitals, as shown here.

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
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   and may be updated, replaced, or obsoleted by other documents at any

Lin, et al.               Expires March 8, 2019                 [Page 1]
Internet-Draft         extended-evpn-optimized-ir         September 2018

   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 March 8, 2019.

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
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   described in the Simplified BSD License.

Table of Contents

   1.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     2.1.  Background  . . . . . . . . . . . . . . . . . . . . . . .   3
       2.1.1.  EVPN Multihoming and Split Horizon Filtering Rule . .   3
     2.2.  Optimized-IR and the Need to Maintain the Original Source
           IP address or Include the ESI Label . . . . . . . . . . .   4
   3.  Solution  . . . . . . . . . . . . . . . . . . . . . . . . . .   5
     3.1.  AR-REPLICATOR Announcing Multihoming Assistant Capability
           for Optimized-IR  . . . . . . . . . . . . . . . . . . . .   5
     3.2.  Multihomed AR-LEAF and Extended-MH AR-REPLICATOR  . . . .   6
     3.3.  The Benefit of the Extended Optimized-IR Procedure  . . .   7
     3.4.  Support for Mixed AR-REPLICATORs  . . . . . . . . . . . .   7
   4.  Extended Optimized-IR Procedure for Supporting Extended-MH
       AR-REPLICATOR . . . . . . . . . . . . . . . . . . . . . . . .   7
     4.1.  AR-LEAF Procedure . . . . . . . . . . . . . . . . . . . .   8
       4.1.1.  Control Plane Procedure for AR-LEAF . . . . . . . . .   8
       4.1.2.  Forwarding Procedure for AR-LEAF  . . . . . . . . . .   9
     4.2.  AR-REPLICATOR Procedure . . . . . . . . . . . . . . . . .   9
       4.2.1.  Control Plane Procedure for AR-REPLICATOR . . . . . .   9
       4.2.2.  Forwarding Procedure for AR-REPLICATOR  . . . . . . .  10
     4.3.  RNVE Procedure  . . . . . . . . . . . . . . . . . . . . .  10
   5.  AR-LEAF's Peer multihomed NVE in the Extended Optimized-IR
       Procedure . . . . . . . . . . . . . . . . . . . . . . . . . .  11
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