Optimized Ingress Replication solution for EVPN
draft-ietf-bess-evpn-optimized-ir-04

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BESS Workgroup                                           J. Rabadan, Ed.
Internet Draft                                              S. Sathappan
Intended status: Standards Track                                   Nokia

                                                                  W. Lin
                                                                 Juniper

                                                              M. Katiyar
                                                          Versa Networks

                                                              A. Sajassi
                                                                   Cisco

Expires: April 3, 2019                                September 30, 2018

            Optimized Ingress Replication solution for EVPN
                  draft-ietf-bess-evpn-optimized-ir-04

Abstract

   Network Virtualization Overlay (NVO) networks using EVPN as control
   plane may use ingress replication (IR) or PIM-based trees to convey
   the overlay BUM traffic. PIM provides an efficient solution to avoid
   sending multiple copies of the same packet over the same physical
   link, however it may not always be deployed in the NVO core network.
   IR avoids the dependency on PIM in the NVO network core. While IR
   provides a simple multicast transport, some NVO networks with
   demanding multicast applications require a more efficient solution
   without PIM in the core. This document describes a solution to
   optimize the efficiency of IR in NVO networks.

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), its areas, and its working groups.  Note that
   other groups may also distribute working documents as Internet-
   Drafts.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
 

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   time.  It is inappropriate to use Internet-Drafts as reference
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   The list of current Internet-Drafts can be accessed at
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   This Internet-Draft will expire on April 3, 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
   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
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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
   2. Solution requirements . . . . . . . . . . . . . . . . . . . . .  4
   3. EVPN BGP Attributes for optimized-IR  . . . . . . . . . . . . .  5
   4. Non-selective Assisted-Replication (AR) Solution Description  .  8
     4.1. Non-selective AR-REPLICATOR procedures  . . . . . . . . . .  8
     4.2. Non-selective AR-LEAF procedures  . . . . . . . . . . . . .  9
     4.3. RNVE procedures . . . . . . . . . . . . . . . . . . . . . . 11
     4.4. Forwarding behavior in non-selective AR EVIs  . . . . . . . 11
       4.4.1. Broadcast and Multicast forwarding behavior . . . . . . 11
         4.4.1.1. Non-selective AR-REPLICATOR BM forwarding . . . . . 11
         4.4.1.2. Non-selective AR-LEAF BM forwarding . . . . . . . . 12
         4.4.1.3. RNVE BM forwarding  . . . . . . . . . . . . . . . . 12
       4.4.2. Unknown unicast forwarding behavior . . . . . . . . . . 13
         4.4.2.1. Non-selective AR-REPLICATOR/LEAF Unknown unicast 
                  forwarding  . . . . . . . . . . . . . . . . . . . . 13
         4.4.2.2. RNVE Unknown unicast forwarding . . . . . . . . . . 13
   5. Selective Assisted-Replication (AR) Solution Description  . . . 13
     5.1. Selective AR-REPLICATOR procedures  . . . . . . . . . . . . 14
 

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     5.2. Selective AR-LEAF procedures  . . . . . . . . . . . . . . . 15
     5.3. Forwarding behavior in selective AR EVIs  . . . . . . . . . 16