EVPN Interworking with IPVPN
draft-ietf-bess-evpn-ipvpn-interworking-03
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BESS Workgroup J. Rabadan, Ed.
Internet-Draft Nokia
Intended status: Standards Track A. Sajassi, Ed.
Expires: November 26, 2020 Cisco
E. Rosen
Individual
J. Drake
W. Lin
Juniper
J. Uttaro
AT&T
A. Simpson
Nokia
May 25, 2020
EVPN Interworking with IPVPN
draft-ietf-bess-evpn-ipvpn-interworking-03
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 IPVPN provides inter-subnet
forwarding, there is a need to specify the interworking aspects
between both EVPN and IPVPN domains, so that the end to end tenant
connectivity can be accomplished. This document specifies how EVPN
should interwork 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 November 26, 2020.
Rabadan, et al. Expires November 26, 2020 [Page 1]
Internet-Draft EVPN and IPVPN Interworking May 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
(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
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described in the Simplified BSD License.
Table of Contents
1. Introduction and Problem Statement . . . . . . . . . . . . . 2
2. Terminology and Interworking PE Components . . . . . . . . . 3
3. Domain Path Attribute (D-PATH) . . . . . . . . . . . . . . . 9
3.1. D-PATH and Loop Prevention . . . . . . . . . . . . . . . 11
4. BGP Path Attribute Propagation across ISF SAFIs . . . . . . . 12
4.1. No-Propagation-Mode . . . . . . . . . . . . . . . . . . . 12
4.2. Uniform-Propagation-Mode . . . . . . . . . . . . . . . . 12
4.3. Aggregation of Routes and Path Attribute Propagation . . 13
5. Route Selection Process between EVPN and other ISF SAFIs . . 14
6. Composite PE Procedures . . . . . . . . . . . . . . . . . . . 15
7. Gateway PE Procedures . . . . . . . . . . . . . . . . . . . . 17
8. Interworking Use-Cases . . . . . . . . . . . . . . . . . . . 19
9. Conclusion . . . . . . . . . . . . . . . . . . . . . . . . . 21
10. Conventions used in this document . . . . . . . . . . . . . . 21
11. Security Considerations . . . . . . . . . . . . . . . . . . . 21
12. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 21
13. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 22
14. Contributors . . . . . . . . . . . . . . . . . . . . . . . . 22
15. References . . . . . . . . . . . . . . . . . . . . . . . . . 22
15.1. Normative References . . . . . . . . . . . . . . . . . . 22
15.2. Informative References . . . . . . . . . . . . . . . . . 22
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 23
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
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