Proxy-ARP/ND function in EVPN networks
draft-snr-bess-evpn-proxy-arp-nd-00

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Document Type Active Internet-Draft (individual)
Last updated 2015-03-09
Replaced by draft-ietf-bess-evpn-proxy-arp-nd
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BESS Workgroup                                           J. Rabadan, Ed.
Internet Draft                                              S. Sathappan
                                                              K. Nagaraj
Intended status: Informational                             W. Henderickx
                                                          Alcatel-Lucent

                                                                 T. King
                                                               D. Melzer
                                                                  DE-CIX

Expires: September 10, 2015                                March 9, 2015

                 Proxy-ARP/ND function in EVPN networks
                  draft-snr-bess-evpn-proxy-arp-nd-00

Abstract

   The MAC/IP Advertisement route specified in [RFC7432] can optionally
   carry IPv4 and IPv6 addresses associated with a MAC address. Remote
   PEs can use this information to reply locally (act as proxy) to IPv4
   ARP requests and IPv6 Neighbor Solicitation messages and
   reduce/suppress the flooding produced by the Address Resolution
   procedure. This EVPN capability is extremely useful in Internet
   Exchange Points (IXPs) with large broadcast domains, where the amount
   of ARP/ND flooded traffic causes issues on routers and CEs, as
   explained in [RFC6820]. This document describes how the [RFC7432]
   EVPN proxy-ARP/ND function should be implemented to help IXPs and
   other operators deal with the issues derived from Address Resolution
   in large broadcast domains.

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), its areas, and its working groups.  Note that
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   Drafts.

   Internet-Drafts are draft documents valid for a maximum of six months
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   time.  It is inappropriate to use Internet-Drafts as reference
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   of current Internet-Drafts can be accessed at
 

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   http://www.ietf.org/ietf/1id-abstracts.txt

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   This Internet-Draft will expire on September 10, 2015.

Copyright Notice

   Copyright (c) 2015 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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   (http://trustee.ietf.org/license-info) in effect on the date of
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   described in the Simplified BSD License.

Table of Contents

   1. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . .  3
   2. Introduction  . . . . . . . . . . . . . . . . . . . . . . . . .  3
     2.1. The IXP use-case  . . . . . . . . . . . . . . . . . . . . .  4
   3. Solution requirements . . . . . . . . . . . . . . . . . . . . .  5
   4. Solution description  . . . . . . . . . . . . . . . . . . . . .  5
     4.1. Learning sub-function . . . . . . . . . . . . . . . . . . .  7
       4.1.1. Proxy-ND and the NA Flags . . . . . . . . . . . . . . .  8
     4.2. Reply sub-function  . . . . . . . . . . . . . . . . . . . .  9
     4.3. Maintenance sub-function  . . . . . . . . . . . . . . . . . 10
     4.4. Flooding (to remote PEs) reduction/suppression  . . . . . . 11
     4.5. Duplicate IP detection  . . . . . . . . . . . . . . . . . . 12
   5. Solution benefits . . . . . . . . . . . . . . . . . . . . . . . 13
   6. Conventions used in this document . . . . . . . . . . . . . . . 13
   7. Security Considerations . . . . . . . . . . . . . . . . . . . . 14
   8. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 14
   9. References  . . . . . . . . . . . . . . . . . . . . . . . . . . 14
     9.1. Normative References  . . . . . . . . . . . . . . . . . . . 14
     9.2. Informative References  . . . . . . . . . . . . . . . . . . 14
   10. Acknowledgments  . . . . . . . . . . . . . . . . . . . . . . . 15
   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 15

 

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