TRILL: Edge Directory Assist Mechanisms
draft-ietf-trill-directory-assist-mechanisms-12

Document Type Active Internet-Draft (trill WG)
Last updated 2017-05-22 (latest revision 2017-03-02)
Replaces draft-dunbar-trill-scheme-for-directory-assist
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Stream WG state Submitted to IESG for Publication (wg milestone: Dec 2015 - Submit Directory Ass... )
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INTERNET-DRAFT                                           Donald Eastlake
Intended status: Proposed Standard                          Linda Dunbar
                                                                  Huawei
                                                           Radia Perlman
                                                                     EMC
                                                               Yizhou Li
                                                                  Huawei
Expires: September 1, 2017                                 March 2, 2017

                TRILL: Edge Directory Assist Mechanisms
         <draft-ietf-trill-directory-assist-mechanisms-12.txt>

Abstract
   This document describes mechanisms for providing directory service to
   TRILL (Transparent Interconnection of Lots of Links) edge switches.
   The directory information provided can be used in reducing multi-
   destination traffic, particularly ARP/ND and unknown unicast
   flooding. It can also be used to detect traffic with forged source
   addresses.

Status of This Memo

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

   Distribution of this document is unlimited. Comments should be sent
   to the TRILL working group mailing list.

   Internet-Drafts are working documents of the Internet Engineering
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   Drafts.

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   The list of current Internet-Drafts can be accessed at
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D. Eastlake, et al                                              [Page 1]
INTERNET-DRAFT                       TRILL: Directory Service Mechanisms

Table of Contents

      1. Introduction............................................4
      1.1 Uses of Directory Information..........................5
      1.2 Terminology............................................5

      2. Push Model Directory Assistance Mechanisms..............7
      2.1 Requesting Push Service................................7
      2.2 Push Directory Servers.................................7
      2.3 Push Directory Server State Machine....................8
      2.3.1 Push Directory States................................9
      2.3.2 Push Directory Events and Conditions................11
      2.3.3 State Transition Diagram and Table..................12
      2.4 End Stations and Push Directories.....................13
      2.5 Additional Push Details...............................14
      2.6 Primary to Secondary Server Push Service..............15
      2.7 Push Directory Configuration..........................16

      3. Pull Model Directory Assistance Mechanisms.............17
      3.1 Pull Directory Message Common Format..................18
      3.1.1 Version Negotiation.................................19
      3.2 Pull Directory Query and Response Messages............20
      3.2.1 Pull Directory Query Message Format.................20
      3.2.2 Pull Directory Responses............................23
      3.2.2.1 Pull Directory Response Message Format............23
      3.2.2.2 Pull Directory Forwarding.........................26
      3.3 Cache Consistency.....................................27
      3.3.1 Update Message Format...............................30
      3.3.2 Acknowledge Message Format..........................31
      3.4 Summary of Records Formats in Messages................32
      3.5 End Stations and Pull Directories.....................32
      3.5.1 Pull Directory Hosted on an End Station.............33
      3.5.2 Use of Pull Directory by End Stations...............34
      3.5.3 Native Pull Directory Messages......................35
      3.6 Pull Directory Message Errors.........................35
      3.6.1 Error Codes.........................................36
      3.6.2 Sub-Errors Under Error Codes 1 and 3................37
      3.6.3 Sub-Errors Under Error Codes 128 and 131............37
      3.7 Additional Pull Details...............................38
      3.8 The No Data Flag......................................38
      3.9 Pull Directory Service Configuration..................39

      4. Directory Use Strategies and Push-Pull Hybrids.........41

      5. TRILL ES-IS............................................43
      5.1 PDUs and System IDs...................................43
      5.2 Adjacency, DRB Election, Hellos, TLVs, Etc............44
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