TRILL Edge Directory Assistance Framework
draft-ietf-trill-directory-framework-00

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Document Type Active Internet-Draft (trill WG)
Last updated 2012-07-09
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

Expires: December 2013                                    July 7, 2012

                 TRILL Edge Directory Assistance Framework

                  draft-ietf-trill-directory-framework-00

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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   This Internet-Draft will expire on November 30, 2012.

Copyright Notice

   Copyright (c) 2009 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
   publication of this document. Please review these documents

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   carefully, as they describe your rights and restrictions with
   respect to this document. Code Components extracted from this 
   document must include Simplified BSD License text as described 
   in Section 4.e of the Trust Legal Provisions and are provided 
   without warranty as described in the Simplified BSD License.

Abstract

   Edge RBridges currently learn the mapping between MAC addresses and
   their egress RBridges by observing the data packets traversed
   through. When ingress RBridge receives a data frame with its
   destination address (MAC&VLAN) unknown, the data frame is flooded
   across the TRILL campus. When there are more than one RBridge ports
   connected to one bridged LAN, only one of them can be designated as
   AF port for forwarding/receiving traffic for each LAN, the rest have
   to be blocked for that LAN.

   This draft describes the framework for using directory service to
   assist edge RBridges to improve TRILL network scalability in data
   center environment.

Conventions used in this document

   The terms ''Subnet'' and ''VLAN'' are used interchangeably in this
   document because it is common to map one subnet to one VLAN. The
   terms ''TRILL switch'' and ''RBridge'' are used interchangeably in
   this document.

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in RFC-2119 [RFC2119].

Table of Contents

   1. Introduction ................................................ 4
   2. Terminology ................................................. 4
   3. Impact on RBridge Campus of Massive Number of stations in a DC 5
      3.1. Issues of Flooding Based Learning in DCs ................ 5
      3.2. Some Examples .......................................... 7
   4. Benefits of Directory Assisted Edge RBridge in DC ............ 8
   5. Generic operation of Directory Assistance .................... 9
      5.1. Information in Directory for Edge Bridges ............... 9
      5.2. Push Model ............................................. 9
      5.3. Pull Model ............................................ 11
   6. Conclusion and Recommendation............................... 12
   7. Security Considerations..................................... 12
   8. IANA Considerations ........................................ 12

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   9. Acknowledgements ........................................... 12
   10. References ................................................ 13
   Authors' Addresses ............................................ 13

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