Layer-3 Accessible EVPN Services
draft-wang-bess-l3-accessible-evpn-00

Document Type Active Internet-Draft (individual)
Authors Wei Wang  , Aijun Wang 
Last updated 2021-02-18
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BESS Working Group                                               W. Wang
Internet-Draft                                                   A. Wang
Intended status: Standards Track                           China Telecom
Expires: August 23, 2021                               February 19, 2021

                    Layer-3 Accessible EVPN Services
                 draft-wang-bess-l3-accessible-evpn-00

Abstract

   This draft describes a new mechanism called "Layer-3 accessible EVPN
   services", which extends the EVPN Service Interfaces in [RFC7432].
   This mechanism allows Layer-3 network to run between CE and PE, and
   defines Logical Session Identifier(LSI) for traffic isolation.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

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   This Internet-Draft will expire on August 23, 2021.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Conventions used in this document . . . . . . . . . . . . . .   2
   3.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   4.  Logical Session Identifier (LSI)  . . . . . . . . . . . . . .   3
     4.1.  The generation of LSI in VxLAN usecase  . . . . . . . . .   3
     4.2.  The generation of LSI in IPSec usecase  . . . . . . . . .   4
     4.3.  The generation of LSI in GRE usecase  . . . . . . . . . .   4
   5.  Service Interfaces  . . . . . . . . . . . . . . . . . . . . .   4
     5.1.  LSI-Based Service Interface . . . . . . . . . . . . . . .   4
     5.2.  LSI-Bundled Service Interface . . . . . . . . . . . . . .   5
     5.3.  LSI-Aware Bundled Service Interface . . . . . . . . . . .   5
   6.  The transmission of LSI . . . . . . . . . . . . . . . . . . .   5
     6.1.  Data Plane  . . . . . . . . . . . . . . . . . . . . . . .   5
       6.1.1.  Extensions to VxLAN . . . . . . . . . . . . . . . . .   5
     6.2.  Control Plane . . . . . . . . . . . . . . . . . . . . . .   6
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .   7
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   7
   9.  Normative References  . . . . . . . . . . . . . . . . . . . .   7
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   8

1.  Introduction

   [RFC7432]defines three service interfaces: VLAN-Based Service
   Interface, VLAN-Bundled Service Interface and VLAN-Aware Bundled
   Service Interface.  These three types of interfaces are suitable for
   different scenarios, and can realize the isolation of layer-2 and
   layer-3 routing and traffic of customers with different granularity.

   In the scenarios corresponding to these service interfaces, CE-PE
   should be placed in the same Layer-2 network.  However, the condition
   usually cannot be met in the current network deployment, because CE-
   PE often need to cross a Layer-3 network.

   This draft defines a new identifier called Logical Session
   Indentifier (LSI) and describes the transmission mechanism of LSI.
   By using LSI, CE can access to EVPN with VxLAN encapsulation through
   layer-3 network.

2.  Conventions used in this document

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in [RFC2119] .

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3.  Terminology

   The following terms are defined in this draft:

   o  CE: Client Edge
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