Integrated Routing and Bridging in EVPN
draft-ietf-bess-evpn-inter-subnet-forwarding-05

Document Type Active Internet-Draft (bess WG)
Last updated 2018-07-18
Replaces draft-sajassi-l2vpn-evpn-inter-subnet-forwarding
Stream IETF
Intended RFC status Proposed Standard
Formats plain text pdf html bibtex
Stream WG state In WG Last Call
Document shepherd Zhaohui Zhang
IESG IESG state I-D Exists
Consensus Boilerplate Yes
Telechat date
Responsible AD (None)
Send notices to "Zhaohui Zhang" <zzhang@juniper.net>
L2VPN Workgroup                                          A. Sajassi, Ed.
INTERNET-DRAFT                                                  S. Salam
Intended Status: Standards Track                               S. Thoria
                                                                   Cisco
                                                                J. Drake
                                                                 Juniper
                                                              J. Rabadan
                                                                   Nokia
                                                                        
Expires: January 18, 2019                                  July 18, 2018

                Integrated Routing and Bridging in EVPN 
            draft-ietf-bess-evpn-inter-subnet-forwarding-05 

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
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Sajassi et al.          Expires January 18, 2019                [Page 1]
INTERNET DRAFT   Integrated Routing & Bridging in EVPN     July 18, 2018

Copyright and License Notice

   Copyright (c) 2014 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
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   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 - Ingress PE . . . . . . . . . . . . . . . 13
       3.2.2 Control Plane - Egress PE  . . . . . . . . . . . . . . . 13
       3.2.3 Data Plane - Ingress PE  . . . . . . . . . . . . . . . . 14
       3.2.4 Data Plane - Egress PE . . . . . . . . . . . . . . . . . 15
     3.3 Asymmetric IRB Procedures  . . . . . . . . . . . . . . . . . 15
       3.3.1 Control Plane - Ingress PE . . . . . . . . . . . . . . . 15
       3.3.2 Control Plane - Egress PE  . . . . . . . . . . . . . . . 16
       3.3.3 Data Plane - Ingress PE  . . . . . . . . . . . . . . . . 17
       3.3.4 Data Plane - Egress PE . . . . . . . . . . . . . . . . . 18
   4 Mobility Procedure . . . . . . . . . . . . . . . . . . . . . . . 18
     4.1 Mobility Procedure for Symmetric IRB . . . . . . . . . . . . 19
       4.1.1 Initiating an ARP Request upon a Move  . . . . . . . . . 19
       4.1.2 Sending Data Traffic without an ARP Request  . . . . . . 20
       4.1.3 Silent Host  . . . . . . . . . . . . . . . . . . . . . . 21
   5 BGP Encoding . . . . . . . . . . . . . . . . . . . . . . . . . . 22
     5.1 Router's MAC Extended Community  . . . . . . . . . . . . . . 22
   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  . . . . . . . . . . . . . . . . 24
       6.1.2 Data Plane Operation . . . . . . . . . . . . . . . . . . 26
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