EVPN Interworking with IPVPN
draft-ietf-bess-evpn-ipvpn-interworking-04

Document Type Active Internet-Draft (bess WG)
Authors Jorge Rabadan  , Ali Sajassi  , Eric Rosen  , John Drake  , Wen Lin  , Jim Uttaro  , Adam Simpson 
Last updated 2020-12-19
Replaces draft-rabadan-sajassi-bess-evpn-ipvpn-interworking
Stream Internent Engineering Task Force (IETF)
Intended RFC status Proposed Standard
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BESS Workgroup                                           J. Rabadan, Ed.
Internet-Draft                                                     Nokia
Intended status: Standards Track                         A. Sajassi, Ed.
Expires: June 22, 2021                                             Cisco
                                                                E. Rosen
                                                              Individual
                                                                J. Drake
                                                                  W. Lin
                                                                 Juniper
                                                               J. Uttaro
                                                                    AT&T
                                                              A. Simpson
                                                                   Nokia
                                                       December 19, 2020

                      EVPN Interworking with IPVPN
               draft-ietf-bess-evpn-ipvpn-interworking-04

Abstract

   EVPN is used as a unified control plane for tenant network intra and
   inter-subnet forwarding.  When a tenant network spans not only EVPN
   domains but also domains where BGP VPN-IP or IP families provide
   inter-subnet forwarding, there is a need to specify the interworking
   aspects between BGP domains of type EVPN, VPN-IP and IP, so that the
   end to end tenant connectivity can be accomplished.  This document
   specifies how EVPN interworks with VPN-IPv4/VPN-IPv6 and IPv4/IPv6
   BGP families for inter-subnet forwarding.

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
   and may be updated, replaced, or obsoleted by other documents at any
   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 22, 2021.

Rabadan, et al.           Expires June 22, 2021                 [Page 1]
Internet-Draft         EVPN and IPVPN Interworking         December 2020

Copyright Notice

   Copyright (c) 2020 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
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction and Problem Statement  . . . . . . . . . . . . .   2
   2.  Conventions used in this document . . . . . . . . . . . . . .   3
   3.  Terminology and Interworking PE Components  . . . . . . . . .   3
   4.  Domain Path Attribute (D-PATH)  . . . . . . . . . . . . . . .   9
   5.  BGP Path Attribute Propagation across ISF SAFIs . . . . . . .  14
     5.1.  No-Propagation-Mode . . . . . . . . . . . . . . . . . . .  14
     5.2.  Uniform-Propagation-Mode  . . . . . . . . . . . . . . . .  14
     5.3.  Aggregation of Routes and Path Attribute Propagation  . .  16
   6.  Route Selection Process between EVPN and other ISF SAFIs  . .  16
   7.  Composite PE Procedures . . . . . . . . . . . . . . . . . . .  18
   8.  Gateway PE Procedures . . . . . . . . . . . . . . . . . . . .  20
   9.  Interworking Use-Cases  . . . . . . . . . . . . . . . . . . .  22
   10. Conclusion  . . . . . . . . . . . . . . . . . . . . . . . . .  23
   11. Security Considerations . . . . . . . . . . . . . . . . . . .  24
   12. IANA Considerations . . . . . . . . . . . . . . . . . . . . .  25
   13. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .  25
   14. Contributors  . . . . . . . . . . . . . . . . . . . . . . . .  25
   15. References  . . . . . . . . . . . . . . . . . . . . . . . . .  25
     15.1.  Normative References . . . . . . . . . . . . . . . . . .  25
     15.2.  Informative References . . . . . . . . . . . . . . . . .  26
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  26

1.  Introduction and Problem Statement

   EVPN is used as a unified control plane for tenant network intra and
   inter-subnet forwarding.  When a tenant network spans not only EVPN
   domains but also domains where BGP VPN-IP or IP families provide
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