TRILL (Transparent Interconnection of Lots of Links) Edge Directory Assistance Framework
draft-ietf-trill-directory-framework-02

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Document Type Active Internet-Draft (trill WG)
Last updated 2013-01-14
Replaces draft-dunbar-trill-directory-assisted-edge
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TRILL working group                                           L. Dunbar
Internet Draft                                              D. Eastlake
Category: Informational                                          Huawei
                                                          Padia Perlman
                                                                  Intel
                                                         Igor Gashinsky
                                                                  Yahoo
                                                       January 14, 2013
Expires: April 2013                                  

            TRILL (Transparent Interconnection of Lots of Links)
                    Edge Directory Assistance Framework

                  draft-ietf-trill-directory-framework-02

Status of this Memo

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Dunbar, et al           Expires November 2013                 [Page 1]
Internet-Draft       TRILL Directory Assistance Framework      Oct 2012

   respect to this document. Code Components extracted from this
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Abstract

   Edge RBridges currently learn the mapping between MAC addresses and
   their egress RBridges by observing the data packets ingressed or
   egressed and by the TRILL ESADI protocol. When ingress RBridge
   receives a data frame whose destination address (MAC&VLAN) that
   RBridge does not know, the data frame is flooded within the VLAN
   across the TRILL campus.

   This draft describes the framework for using directory services to
   assist edge RBridges by reducing multi-destination frames,
   particularly unknown unicast frames flooding, and ARP/ND, improving
   TRILL (Transparent Interconnection of Lots of Links) network
   scalability in environments such as data centers.

Table of Contents

   1. Introduction .................................................. 3
   2. Terminology ................................................... 3
   3. RBridge Campus Impact of Massive Number of End Stations in a DC 4
      3.1. Issues of Flooding Based Learning in DCs ................. 4
      3.2. Some Examples ............................................ 6
   4. Benefits of Directory Assisted Edge RBridge in DC ............. 7
   5. Generic operation of Directory Assistance ..................... 8
      5.1. Information in Directory for Edge Bridges ................ 8
      5.2. Push Model ............................................... 9
      5.3. Pull Model .............................................. 10
   6. Conclusion and Recommendation  ............................... 12
   7. Security Considerations  ..................................... 12
   8. IANA Considerations .......................................... 12
   9. Acknowledgements ............................................. 12
   10. References .................................................. 12
      10.1. Normative References ................................... 12
      10.2. Informative References  ................................ 13
   Authors' Addresses .............................................. 13

Dunbar, et al                                                [Page 2]
Internet-Draft       TRILL Directory Assistance Framework      Oct 2012

1. Introduction

   Edge RBridges (devices implementing [RFC6325], also known as TRILL
   (Transparent Interconnection of Lots of Links) Switches) currently
   learn the mapping between destination MAC addresses and their egress
   RBridges by observing data packets or by ESADI (End Station Address
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