Integrated Routing and Bridging in EVPN
draft-ietf-bess-evpn-inter-subnet-forwarding-08

• Status
• IESG evaluation record
• IESG writeups
• Email expansions
• History

• Versions
• 00
• 01
• 02
• 03
• 04
• 05
• 06
• 07
• 08

BESS Workgroup                                           A. Sajassi, Ed.
INTERNET-DRAFT                                                  S. Salam
Intended Status: Standards Track                               S. Thoria
                                                                   Cisco
                                                                J. Drake
                                                                 Juniper
                                                              J. Rabadan
                                                                   Nokia
                                                                        
Expires: September 4, 2019                                 March 4, 2019

                Integrated Routing and Bridging in EVPN 
            draft-ietf-bess-evpn-inter-subnet-forwarding-08 

Abstract

   EVPN provides an extensible and flexible multi-homing VPN solution
   over an MPLS/IP network for intra-subnet connectivity among Tenant
   Systems and End Devices that can be physical or virtual. However,
   there are scenarios for which there is a need for a dynamic and
   efficient inter-subnet connectivity among these Tenant Systems and
   End Devices while maintaining the multi-homing capabilities of EVPN.
   This document describes an Integrated Routing and Bridging (IRB)
   solution based on EVPN to address such requirements. 

Status of this Memo

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

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF), its areas, and its working groups.  Note that
   other groups may also distribute working documents as
   Internet-Drafts.

   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."

   The list of current Internet-Drafts can be accessed at
   http://www.ietf.org/1id-abstracts.html

   The list of Internet-Draft Shadow Directories can be accessed at
   http://www.ietf.org/shadow.html
 

Sajassi et al.         Expires September 4, 2019                [Page 1]
INTERNET DRAFT   Integrated Routing & Bridging in EVPN     March 4, 2019

Copyright and License Notice

   Copyright (c) 2019 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
   (http://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  . . . . . . . . . . . . . . . . . . . . . . . . .  6
   2 EVPN PE Model for IRB Operation  . . . . . . . . . . . . . . . .  7
   3  Symmetric and Asymmetric IRB  . . . . . . . . . . . . . . . . .  8
     3.1 IRB Interface and its MAC & IP addresses . . . . . . . . . . 11
     3.2 Symmetric IRB Procedures . . . . . . . . . . . . . . . . . . 13
       3.2.1 Control Plane - Advertising PE . . . . . . . . . . . . . 13
       3.2.2 Control Plane - Receiving PE . . . . . . . . . . . . . . 14
       3.2.3 Data Plane - Ingress PE  . . . . . . . . . . . . . . . . 15
       3.2.4 Data Plane - Egress PE . . . . . . . . . . . . . . . . . 15
     3.3 Asymmetric IRB Procedures  . . . . . . . . . . . . . . . . . 16
       3.3.1 Control Plane - Advertising PE . . . . . . . . . . . . . 16
       3.3.2 Control Plane - Receiving PE . . . . . . . . . . . . . . 17
       3.3.3 Data Plane - Ingress PE  . . . . . . . . . . . . . . . . 17
       3.3.4 Data Plane - Egress PE . . . . . . . . . . . . . . . . . 18
   4 Mobility Procedure . . . . . . . . . . . . . . . . . . . . . . . 18
     4.1 Initiating an ARP Request upon a Move  . . . . . . . . . . . 19
     4.2 Sending Data Traffic without an ARP Request  . . . . . . . . 20
     4.3 Silent Host  . . . . . . . . . . . . . . . . . . . . . . . . 22
   5 BGP Encoding . . . . . . . . . . . . . . . . . . . . . . . . . . 23
     5.1 Router's MAC Extended Community  . . . . . . . . . . . . . . 23
   6 Operational Models for Symmetric Inter-Subnet Forwarding . . . . 23
     6.1 IRB forwarding on NVEs for Tenant Systems  . . . . . . . . . 23
       6.1.1 Control Plane Operation  . . . . . . . . . . . . . . . . 25
       6.1.2 Data Plane Operation . . . . . . . . . . . . . . . . . . 26
     6.2 IRB forwarding on NVEs for Subnets behind Tenant Systems . . 27