TRILL: ARP/ND Optimization
draft-ietf-trill-arp-optimization-09

Document Type Active Internet-Draft (trill WG)
Last updated 2017-10-08
Replaces draft-yizhou-trill-arp-optimization, draft-trill-trill-arp-optimization
Stream IETF
Intended RFC status Proposed Standard
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Reviews
Stream WG state Submitted to IESG for Publication
Document shepherd Susan Hares
Shepherd write-up Show (last changed 2017-05-31)
IESG IESG state IESG Evaluation::AD Followup
Consensus Boilerplate Yes
Telechat date On agenda of 2017-11-30 IESG telechat (returning item)
Has a DISCUSS. Has enough positions to pass once DISCUSS positions are resolved.
Responsible AD Alia Atlas
Send notices to (None)
IANA IANA review state Version Changed - Review Needed
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TRILL Working Group                                                Y. Li
INTERNET-DRAFT                                               D. Eastlake
Intended Status: Standard Track                                L. Dunbar
                                                     Huawei Technologies
                                                              R. Perlman
                                                                     EMC
                                                                M. Umair
                                                                   Cisco
Expires: April 12, 2017                                  October 9, 2017

                       TRILL: ARP/ND Optimization
                  draft-ietf-trill-arp-optimization-09

Abstract

   This document describes mechanisms to optimize the ARP (Address
   Resolution Protocol) and ND (Neighbor Discovery) traffic in a TRILL
   campus. TRILL switches maintain a cache of IP/MAC address/Data Label
   bindings that are learned from ARP/ND requests and responses that
   pass through them. In many cases, this cache allows an edge RBridge
   to avoid flooding an ARP/ND request by either responding to it
   directly or by encapsulating it and unicasting it. 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.

   Internet-Drafts are working documents of the Internet Engineering
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Yizhou, et al                                                   [Page 1]
INTERNET DRAFT         TRILL ARP/ND Optimization            October 2017

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
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   described in the Simplified BSD License.

Table of Contents

   1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . .  3
     1.1  Terminology . . . . . . . . . . . . . . . . . . . . . . . .  3
   2 ARP/ND Optimization Requirement and Solution . . . . . . . . . .  4
   3 IP/MAC Address Mappings  . . . . . . . . . . . . . . . . . . . .  5
   4 Handling ARP/ND/SEND Messages  . . . . . . . . . . . . . . . . .  5
     4.1 SEND Considerations  . . . . . . . . . . . . . . . . . . . .  6
     4.2 Address Verification . . . . . . . . . . . . . . . . . . . .  7
     4.3 Extracting Local End Station IP/MAC Mapping Information  . .  7
     4.4 Determine How to Reply to ARP/ND . . . . . . . . . . . . . .  8
     4.5 Determine How to Handle the ARP/ND Response  . . . . . . . . 10
   5 Handling of RARP (Reverse Address Resolution Protocol)
     Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
   6 Handling of DHCP messages  . . . . . . . . . . . . . . . . . . . 10
   7 Handling of Duplicate IP Addresses . . . . . . . . . . . . . . . 10
   8 RBridge ARP/ND Cache Liveness and MAC Mobility . . . . . . . . . 11
   9 Security Considerations  . . . . . . . . . . . . . . . . . . . . 12
     9.1 Data Plane Based Considerations  . . . . . . . . . . . . . . 12
     9.2 Directory Based Considerations . . . . . . . . . . . . . . . 13
     9.3 Use of the Confidence Level Feature  . . . . . . . . . . . . 13
   10 IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 13
   11 Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . 14
   12 References  . . . . . . . . . . . . . . . . . . . . . . . . . . 14
     12.1 Normative References  . . . . . . . . . . . . . . . . . . . 14
     12.2 Informative References  . . . . . . . . . . . . . . . . . . 15
   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 16

 

Yizhou, et al                                                   [Page 2]
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