Integrated Routing and Bridging in EVPN
draft-ietf-bess-evpn-inter-subnet-forwarding-07

The information below is for an old version of the document
Document Type Active Internet-Draft (bess WG)
Last updated 2019-02-18 (latest revision 2019-02-11)
Replaces draft-sajassi-l2vpn-evpn-inter-subnet-forwarding
Stream IETF
Intended RFC status Proposed Standard
Formats pdf htmlized bibtex
Stream WG state WG Consensus: Waiting for Write-Up
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: August 11, 2019                               February 11, 2019

                Integrated Routing and Bridging in EVPN 
            draft-ietf-bess-evpn-inter-subnet-forwarding-07 

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
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Sajassi et al.          Expires August 11, 2019                 [Page 1]
INTERNET DRAFT   Integrated Routing & Bridging in EVPN February 11, 2019

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
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   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
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