EVPN VPWS Flexible Cross-Connect Service
draft-ietf-bess-evpn-vpws-fxc-02

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Last updated 2020-09-08
Replaces draft-sajassi-bess-evpn-vpws-fxc
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BESS Working Group                                       A. Sajassi, Ed.
Internet-Draft                                              P. Brissette
Intended status: Standards Track                           Cisco Systems
Expires: March 12, 2021                                        J. Uttaro
                                                                    AT&T
                                                                J. Drake
                                                        Juniper Networks
                                                              S. Boutros
                                                                   Ciena
                                                              J. Rabadan
                                                                   Nokia
                                                       September 8, 2020

                EVPN VPWS Flexible Cross-Connect Service
                    draft-ietf-bess-evpn-vpws-fxc-02

Abstract

   This document describes a new EVPN VPWS service type specifically for
   multiplexing multiple attachment circuits across different Ethernet
   Segments and physical interfaces into a single EVPN VPWS service
   tunnel and still providing Single-Active and All-Active multi-homing.
   This new service is referred to as flexible cross-connect service.
   After a description of the rationale for this new service type, the
   solution to deliver such service is detailed.

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
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   This Internet-Draft will expire on March 12, 2021.

Sajassi, et al.          Expires March 12, 2021                 [Page 1]
Internet-Draft      EVPN VPWS Flexible Cross-Connect      September 2020

Copyright Notice

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   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   3
     1.2.  Requirements Language . . . . . . . . . . . . . . . . . .   4
   2.  Requirements  . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Solution  . . . . . . . . . . . . . . . . . . . . . . . . . .   6
     3.1.  VPWS Service Identifiers  . . . . . . . . . . . . . . . .   7
     3.2.  Flexible Xconnect . . . . . . . . . . . . . . . . . . . .   7
       3.2.1.  Default mode FXC with Multi-homing  . . . . . . . . .   8
     3.3.  VLAN-Signaled Flexible Xconnect . . . . . . . . . . . . .   8
       3.3.1.  Local Switching . . . . . . . . . . . . . . . . . . .   9
     3.4.  Service Instantiation . . . . . . . . . . . . . . . . . .  10
   4.  BGP Extensions  . . . . . . . . . . . . . . . . . . . . . . .  10
   5.  Failure Scenarios . . . . . . . . . . . . . . . . . . . . . .  11
     5.1.  EVPN VPWS Service Failure . . . . . . . . . . . . . . . .  13
     5.2.  Attachment Circuit Failure  . . . . . . . . . . . . . . .  13
     5.3.  PE Port Failure . . . . . . . . . . . . . . . . . . . . .  14
     5.4.  PE Node Failure . . . . . . . . . . . . . . . . . . . . .  14
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .  14
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  14
   8.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  15
     8.1.  Normative References  . . . . . . . . . . . . . . . . . .  15
     8.2.  Informative References  . . . . . . . . . . . . . . . . .  15
   Appendix A.  Contributors . . . . . . . . . . . . . . . . . . . .  15
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  16

1.  Introduction

   [RFC8214] describes a solution to deliver P2P services using BGP
   constructs defined in [RFC7432].  It delivers this P2P service
   between a pair of Attachment Circuits (ACs), where an AC can
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