A Simplified Scalable ELAN Service Model with Segment Routing Underlay
draft-boutros-bess-elan-services-over-sr-02

Document Type Active Internet-Draft (individual)
Authors Sami Boutros  , Siva Sivabalan  , Himanshu Shah  , Jim Uttaro  , Daniel Voyer  , Bin Wen  , Luay Jalil 
Last updated 2021-02-21
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BESS Workgroup                                           S. Boutros, Ed.
Internet-Draft                                         S. Sivabalan, Ed.
Intended status: Standards Track                                 H. Shah
Expires: August 25, 2021                               Ciena Corporation
                                                               J. Uttaro
                                                                     ATT
                                                                D. Voyer
                                                             Bell Canada
                                                                  B. Wen
                                                                 Comcast
                                                                L. Jalil
                                                                 Verizon
                                                       February 21, 2021

 A Simplified Scalable ELAN Service Model with Segment Routing Underlay
              draft-boutros-bess-elan-services-over-sr-02

Abstract

   This document proposes a new approach for deploying Ethernet LAN
   (ELAN) services with an objective of achieving high scalability,
   faster network convergence, and reduced operational complexity.
   Furthermore, it naturally brings the benefits of All-Active
   multihoming as well as MAC learning in data-plane.

Status of This Memo

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   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
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   This Internet-Draft will expire on August 25, 2021.

Copyright Notice

   Copyright (c) 2021 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Boutros, et al.          Expires August 25, 2021                [Page 1]
Internet-Draft     ELAN Services with Segment Routing      February 2021

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Abbreviations . . . . . . . . . . . . . . . . . . . . . . . .   4
   4.  Control Plane Behavior  . . . . . . . . . . . . . . . . . . .   5
     4.1.  Service discovery . . . . . . . . . . . . . . . . . . . .   5
     4.2.  All-Active Service Redundancy . . . . . . . . . . . . . .   5
     4.3.  Mass service withdrawal . . . . . . . . . . . . . . . . .   5
     4.4.  E-Tree Support  . . . . . . . . . . . . . . . . . . . . .   6
   5.  Data Plane Behavior . . . . . . . . . . . . . . . . . . . . .   6
     5.1.  Unicast Traffic . . . . . . . . . . . . . . . . . . . . .   6
     5.2.  BUM Traffic . . . . . . . . . . . . . . . . . . . . . . .   7
     5.3.  Data Plane MAC learning . . . . . . . . . . . . . . . . .   8
       5.3.1.  Single Home CE  . . . . . . . . . . . . . . . . . . .   8
       5.3.2.  Multi-Home CE . . . . . . . . . . . . . . . . . . . .   9
     5.4.  ARP suppression . . . . . . . . . . . . . . . . . . . . .   9
     5.5.  Distributed Anycast Gateway . . . . . . . . . . . . . . .  10
     5.6.  Multi-pathing . . . . . . . . . . . . . . . . . . . . . .  10
     5.7.  E-Tree Support  . . . . . . . . . . . . . . . . . . . . .  10
   6.  Benefits of ELAN over SR  . . . . . . . . . . . . . . . . . .  10
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .  11
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  11
   9.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  11
   10. References  . . . . . . . . . . . . . . . . . . . . . . . . .  11
     10.1.  Normative References . . . . . . . . . . . . . . . . . .  11
     10.2.  Informative References . . . . . . . . . . . . . . . . .  11
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  12

1.  Introduction

   Virtual Private LAN Service(VPLS) is based on Pseudo-Wire (PW)
   construct which identifies both the service type and the service
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