Extended Mobility Procedures for EVPN-IRB
draft-ietf-bess-evpn-irb-extended-mobility-01

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

• Versions
• 00
• 01

BESS Working Group                                      N. Malhotra, Ed.
INTERNET-DRAFT                                                    Arrcus

Intended Status: Proposed Standard                            A. Sajassi
                                                             A. Pattekar
                                                                   Cisco

                                                              A. Lingala
                                                                    AT&T

                                                              J. Rabadan
                                                                   Nokia

                                                                J. Drake
                                                        Juniper Networks

Expires: Dec 21, 2019                                      June 19, 2019

               Extended Mobility Procedures for EVPN-IRB 
             draft-ietf-bess-evpn-irb-extended-mobility-01

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
 

Malhotra et al.           Expires Dec 21, 2019                  [Page 1]
INTERNET DRAFT         EVPN-IRB Extended Mobility          June 19, 2019

   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

Copyright and License Notice

   Copyright (c) 2017 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  . . . . . . . . . . . . . . . . . . . . . . . . .  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
 

Malhotra et al.           Expires Dec 21, 2019                  [Page 2]
INTERNET DRAFT         EVPN-IRB Extended Mobility          June 19, 2019