Transparent Interconnection of Lots of Links (TRILL): Multi-Topology
draft-ietf-trill-multi-topology-06

Document Type Active Internet-Draft (trill WG)
Last updated 2018-04-20 (latest revision 2018-03-09)
Replaces draft-eastlake-trill-multi-topology
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INTERNET-DRAFT                                           Donald Eastlake
Intended status: Proposed Standard                          Mingui Zhang
                                                                  Huawei
                                                           Ayan Banerjee
                                                                   Cisco
Expires: September 8, 2018                                 March 9, 2018

         Transparent Interconnection of Lots of Links (TRILL):
                             Multi-Topology
                <draft-ietf-trill-multi-topology-06.txt>

Abstract
   This document specifies extensions to the IETF TRILL (Transparent
   Interconnection of Lots of Links) protocol to support multi-topology
   routing of unicast and multi-destination traffic based on IS-IS
   (Intermediate System to Intermediate System) multi-topology specified
   in RFC 5120.

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.

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   Task Force (IETF), its areas, and its working groups.  Note that
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   Drafts.

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D. Eastlake, M. Zhang, A. Banerjee                              [Page 1]
INTERNET-DRAFT                                     TRILL: Multi-Topology

Table of Contents

      1. Introduction............................................3
      1.1 Terminology............................................4

      2. Topologies..............................................5
      2.1 Special Topology Zero..................................5
      2.2 Links and Multi-Topology...............................5
      2.3 TRILL Switches and Multi-Topology......................5
      2.4 TRILL Data Packets and Multi-Topology..................6
      2.4.1 Explicit Topology Labeling Support...................6
      2.4.2 The Explicit Topology Label..........................7
      2.4.3 TRILL Use of the MT Label............................8

      3. TRILL Multi-Topology Adjacency and Routing.............10
      3.1 Adjacency.............................................10
      3.2 TRILL Switch Nicknames................................10
      3.3 TRILL Unicast Routing.................................11
      3.4 TRILL Multi-Destination Routing.......................11
      3.4.1 Distribution Trees..................................11
      3.4.2 Multi-Access Links..................................13

      4. Mixed Links............................................14

      5. Other Multi-Topology Considerations....................15
      5.1 Address Learning......................................15
      5.1.1 Data Plane Learning.................................15
      5.1.2 Multi-Topology ESADI................................15
      5.2 Legacy Stubs..........................................15
      5.3 RBridge Channel Messages..............................15
      5.4 Implementations Considerations........................16

      6. Allocation Considerations..............................17
      6.1 IEEE Registration Authority Considerations............17
      6.2 IANA Considerations...................................17

      7. Security Considerations................................18

      Normative References......................................19
      Informative References....................................20

      Acknowledgements..........................................21
      Appendix A: Differences from RFC 5120.....................21

      Authors' Addresses........................................22

D. Eastlake, M. Zhang, A. Banerjee                              [Page 2]
INTERNET-DRAFT                                     TRILL: Multi-Topology

1. Introduction

   This document specifies extensions to the IETF TRILL (Transparent
   Interconnection of Lots of Links) protocol [RFC6325] [RFC7177]
   [RFC7780] to support multi-topology routing for both unicast and
   multi-destination traffic based on IS-IS (Intermediate System to
   Intermediate System, [IS-IS]) multi-topology [RFC5120].
   Implementation and use of multi-topology are optional and use
   requires configuration.  It is anticipated that not all TRILL
   campuses will need or use multi-topology.
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