Operational Aspects of Proxy-ARP/ND in EVPN Networks
draft-ietf-bess-evpn-proxy-arp-nd-11

Document Type Active Internet-Draft (bess WG)
Authors Jorge Rabadan  , Senthil Sathappan  , Kiran Nagaraj  , Greg Hankins  , Thomas King 
Last updated 2021-01-21 (latest revision 2021-01-07)
Replaces draft-snr-bess-evpn-proxy-arp-nd
Stream IETF
Intended RFC status Proposed Standard
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Document shepherd Matthew Bocci
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BESS Workgroup                                           J. Rabadan, Ed.
Internet-Draft                                              S. Sathappan
Updates: 7432 (if approved)                                   K. Nagaraj
Intended status: Standards Track                              G. Hankins
Expires: July 11, 2021                                             Nokia
                                                                 T. King
                                                                  DE-CIX
                                                         January 7, 2021

          Operational Aspects of Proxy-ARP/ND in EVPN Networks
                  draft-ietf-bess-evpn-proxy-arp-nd-11

Abstract

   This document describes the EVPN Proxy-ARP/ND function, augmented by
   the capability of the ARP/ND Extended Community
   [I-D.ietf-bess-evpn-na-flags].  From that perspective this document
   updates [RFC7432].  The EVPN Proxy-ARP/ND function and the ARP/ND
   Extended Community help operators of Internet Exchange Points (IXPs),
   Data Centers (DCs), and other networks deal with IPv4 and IPv6
   address resolution issues associated with large Broadcast Domains
   (DBs) by reducing and even suppressing the flooding produced by
   address resolution in the EVPN network.

Status of This Memo

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

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at https://datatracker.ietf.org/drafts/current/.

   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."

   This Internet-Draft will expire on July 11, 2021.

Copyright Notice

   Copyright (c) 2021 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Rabadan, et al.           Expires July 11, 2021                 [Page 1]
Internet-Draft              EVPN Proxy-ARP/ND               January 2021

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (https://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
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Table of Contents

   1.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   4
     2.1.  The DC Use-Case . . . . . . . . . . . . . . . . . . . . .   4
     2.2.  The IXP Use-Case  . . . . . . . . . . . . . . . . . . . .   5
   3.  Solution Description  . . . . . . . . . . . . . . . . . . . .   6
     3.1.  Learning Sub-Function . . . . . . . . . . . . . . . . . .   8
       3.1.1.  Proxy-ND and the NA Flags . . . . . . . . . . . . . .   9
     3.2.  Reply Sub-Function  . . . . . . . . . . . . . . . . . . .  10
     3.3.  Unicast-forward Sub-Function  . . . . . . . . . . . . . .  11
     3.4.  Maintenance Sub-Function  . . . . . . . . . . . . . . . .  12
     3.5.  Flooding (to Remote PEs) Reduction/Suppression  . . . . .  13
     3.6.  Duplicate IP Detection  . . . . . . . . . . . . . . . . .  14
   4.  Solution Benefits . . . . . . . . . . . . . . . . . . . . . .  16
   5.  Deployment Scenarios  . . . . . . . . . . . . . . . . . . . .  16
     5.1.  All Dynamic Learning  . . . . . . . . . . . . . . . . . .  17
     5.2.  Dynamic Learning with Proxy-ARP/ND  . . . . . . . . . . .  17
     5.3.  Hybrid Dynamic Learning and Static Provisioning with
           Proxy-ARP/ND  . . . . . . . . . . . . . . . . . . . . . .  17
     5.4.  All Static Provisioning with Proxy-ARP/ND . . . . . . . .  17
     5.5.  Deployment Scenarios in IXPs  . . . . . . . . . . . . . .  18
     5.6.  Deployment Scenarios in DCs . . . . . . . . . . . . . . .  19
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .  19
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  20
   8.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .  20
   9.  Contributors  . . . . . . . . . . . . . . . . . . . . . . . .  20
   10. References  . . . . . . . . . . . . . . . . . . . . . . . . .  20
     10.1.  Normative References . . . . . . . . . . . . . . . . . .  21
     10.2.  Informative References . . . . . . . . . . . . . . . . .  21
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  22

1.  Terminology
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