EVPN-VPWS Seamless Integration with Legacy VPWS
draft-brissette-bess-evpn-vpws-seamless-02
BESS Working Group P. Brissette, Ed.
Internet-Draft A. Sajassi
Intended status: Standards Track LA. Burdet
Expires: September 12, 2021 Cisco Systems
J. Uttaro
ATT
D. Voyer
Bell Canada
I. Ghamari
LinkedIn
E. Leyton
Verizon Wireless
March 11, 2021
EVPN-VPWS Seamless Integration with Legacy VPWS
draft-brissette-bess-evpn-vpws-seamless-02
Abstract
This document specifies mechanisms for backward compatibility of
Ethernet VPN Virtual Private Wire Service (EVPN-VPWS) solutions with
legacy Virtual Private Wire Service (VPWS). It provides mechanisms
for seamless integration in the same MPLS/IP network on a per-
pseudowire or per flexible-crossconnect service basis.
Implementation of this document enables service providers to
introduce EVPN-VPWS PEs in their brown-field deployments of legacy
VPWS networks. This document specifies control-plane and forwarding
behaviour needed for auto-discovery of a pseudowire in order to
enable seamless integration between EVPN-VPWS and VPWS PEs.
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 September 12, 2021.
Brissette, et al. Expires September 12, 2021 [Page 1]
Internet-Draft Abbreviated Title March 2021
Copyright Notice
Copyright (c) 2021 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. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1. Requirements Language . . . . . . . . . . . . . . . . . . 4
2. Terms and Abbreviations . . . . . . . . . . . . . . . . . . . 5
3. Solution Requirements . . . . . . . . . . . . . . . . . . . . 6
4. Seamless Integration . . . . . . . . . . . . . . . . . . . . 7
5. Capability Discovery . . . . . . . . . . . . . . . . . . . . 7
6. Forwarding and Control Plane Operations . . . . . . . . . . . 7
6.1. Multi-homed Operations . . . . . . . . . . . . . . . . . 9
6.1.1. Operations with Port-Active MH PEs . . . . . . . . . 9
6.1.2. Operation with Single-Active MH PEs . . . . . . . . . 10
6.1.3. Operation with All-Active MH PEs . . . . . . . . . . 10
6.1.3.1. Falling back to port-active . . . . . . . . . . . 10
6.1.3.2. Asymmetric forwarding . . . . . . . . . . . . . . 11
7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 12
8. Security Considerations . . . . . . . . . . . . . . . . . . . 12
9. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 12
10. References . . . . . . . . . . . . . . . . . . . . . . . . . 12
10.1. Normative References . . . . . . . . . . . . . . . . . . 12
10.2. Informative References . . . . . . . . . . . . . . . . . 13
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 13
1. Introduction
Virtual Private Wire Service (VPWS) is a widely-deployed Layer-2 VPN
(L2VPN) technology. Many service providers, who are looking at
adopting Ethernet VPN Virtual Private Wire Service (EVPN-VPWS), want
Show full document text