TRILL: ARP/ND Optimization
draft-ietf-trill-arp-optimization-01

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Document Type Active Internet-Draft (trill WG)
Last updated 2015-10-14 (latest revision 2015-10-13)
Replaces draft-yizhou-trill-arp-optimization, draft-trill-trill-arp-optimization
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TRILL Working Group                                                Y. Li
INTERNET-DRAFT                                               D. Eastlake
Intended Status: Standard Track                                L. Dunbar
                                                     Huawei Technologies
                                                              R. Perlman
                                                                     EMC
                                                            I. Gashinsky
                                                                   Yahoo
Expires: April 16, 2016                                 October 14, 2015

                       TRILL: ARP/ND Optimization
                  draft-ietf-trill-arp-optimization-01

Abstract

   This document describes mechanisms to optimize the ARP (Address
   Resolution Protocol) and ND (Neighbor Discovery) traffic in TRILL
   campus. Such optimization reduces packet flooding over a TRILL
   campus.

Status of this Memo

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

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Copyright and License Notice

   Copyright (c) 2015 IETF Trust and the persons identified as the
 

Yizhou, et al                                                   [Page 1]
INTERNET DRAFT         TRILL ARP/ND Optimization            October 2015

   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
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   described in the Simplified BSD License.

Table of Contents

   1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . .  3
     1.1  Terminology . . . . . . . . . . . . . . . . . . . . . . . .  3
   2 IP/MAC Address Mappings  . . . . . . . . . . . . . . . . . . . .  4
   3 Handling ARP/ND Messages . . . . . . . . . . . . . . . . . . . .  4
     3.1 Get Sender's IP/MAC Mapping Information for Non-zero IP  . .  5
     3.2 Determine How to Reply to ARP/ND . . . . . . . . . . . . . .  5
     3.3 Determine How to Handle the ARP/ND Response  . . . . . . . .  7
   4 Handling RARP (Reverse Address Resolution Protocol) Messages . .  7
   5 Security Considerations  . . . . . . . . . . . . . . . . . . . .  7
   6 IANA Considerations  . . . . . . . . . . . . . . . . . . . . . .  8
   7 References . . . . . . . . . . . . . . . . . . . . . . . . . . .  8
     7.1 Normative References . . . . . . . . . . . . . . . . . . . .  8
     7.2 Informative References . . . . . . . . . . . . . . . . . . .  9
   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . .  9

 

Yizhou, et al                                                   [Page 2]
INTERNET DRAFT         TRILL ARP/ND Optimization            October 2015

1 Introduction

   ARP [RFC826] and ND [RFC4861] are normally sent by broadcast and
   multicast respectively. To reduce the burden on a TRILL campus caused
   by these multi-destination messages, RBridges MAY implement an
   "optimized ARP/ND response", as specified herein, when the target's
   location is known by the ingress RBridge or can be obtained from a
   directory. This avoids ARP/ND query flooding.

1.1  Terminology

   The acronyms and terminology in [RFC6325] are used herein. Some of
   these are listed below for convenience with the following along with
   some additions:

   Campus: a TRILL network consisting of TRILL switches, links, and
   possibly bridges bounded by end stations and IP routers. For TRILL,
   there is no "academic" implication in the name "campus".

   APPsub-TLV     Application sub-Type-Length-Values

   ARP            Address Resolution Protocol [RFC826]

   DAD            Duplicate Address Detection

   Data Label     VLAN or FGL
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