Extended Mobility Procedures for EVPN-IRB
draft-ietf-bess-evpn-irb-extended-mobility-03

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Internet Draft                                          N. Malhotra, Ed.
BESS Working Group                                            A. Sajassi
Intended Status: Proposed Standard                           A. Pattekar
                                                                   Cisco

                                                              A. Lingala
                                                                    AT&T

                                                              J. Rabadan
                                                                   Nokia

                                                                J. Drake
                                                        Juniper Networks

Expires: November 18, 2020                                  May 17, 2020

               Extended Mobility Procedures for EVPN-IRB 
             draft-ietf-bess-evpn-irb-extended-mobility-03

Abstract

   Procedure to handle host mobility in a layer 2 Network with EVPN
   control plane is defined as part of RFC 7432. EVPN has since evolved
   to find wider applicability across various IRB use cases that include
   distributing both MAC and IP reachability via a common EVPN control
   plane. MAC Mobility procedures defined in RFC 7432 are extensible to
   IRB use cases if a fixed 1:1 mapping between VM IP and MAC is assumed
   across VM moves. Generic mobility support for IP and MAC that allows
   these bindings to change across moves is required to support a
   broader set of EVPN IRB use cases, and requires further
   consideration. EVPN all-active multi-homing further introduces
   scenarios that require additional consideration from mobility
   perspective. This document enumerates a set of design considerations
   applicable to mobility across these EVPN IRB use cases and defines
   generic sequence number assignment procedures to address these IRB
   use cases.

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.

 

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INTERNET DRAFT         EVPN-IRB Extended Mobility           May 17, 2020

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   Copyright (c) 2017 IETF Trust and the persons identified as the
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Table of Contents

   1  Introduction  . . . . . . . . . . . . . . . . . . . . . . . . .  4
     1.1  Terminology . . . . . . . . . . . . . . . . . . . . . . . .  5
   2.  Optional MAC only RT-2 . . . . . . . . . . . . . . . . . . . .  6
   3.  Mobility Use Cases . . . . . . . . . . . . . . . . . . . . . .  6
     3.1  Host MAC+IP Move  . . . . . . . . . . . . . . . . . . . . .  6
     3.2  Host IP Move to new MAC . . . . . . . . . . . . . . . . . .  6
       3.2.1  VM Reload . . . . . . . . . . . . . . . . . . . . . . .  7
       3.2.2  MAC Sharing . . . . . . . . . . . . . . . . . . . . . .  7
       3.2.3  Problem . . . . . . . . . . . . . . . . . . . . . . . .  7
     3.3  Host MAC move to new IP . . . . . . . . . . . . . . . . . .  8
       3.3.1  Problem . . . . . . . . . . . . . . . . . . . . . . . .  8
   4.  EVPN All Active multi-homed ES . . . . . . . . . . . . . . . . 11
   5.  Design Considerations  . . . . . . . . . . . . . . . . . . . . 12
   6.  Solution Components  . . . . . . . . . . . . . . . . . . . . . 13
     6.1  Sequence Number Inheritance . . . . . . . . . . . . . . . . 13
     6.2  MAC Sharing . . . . . . . . . . . . . . . . . . . . . . . . 14
     6.3  Multi-homing Mobility Synchronization . . . . . . . . . . . 15
 

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