TRILL: Multi-Topology
draft-ietf-trill-multi-topology-04

Document Type Active Internet-Draft (trill WG)
Last updated 2017-05-22
Replaces draft-eastlake-trill-multi-topology
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INTERNET-DRAFT                                           Donald Eastlake
Intended status: Proposed Standard                          Mingui Zhang
Updates: 6325, 7177                                               Huawei
                                                           Ayan Banerjee
                                                                   Cisco
Expires: November 21, 2017                                  May 22, 2017

                         TRILL: Multi-Topology
                <draft-ietf-trill-multi-topology-04.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. This document updates RFC 6325 and RFC 7177.

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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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..............................................6
      2.1 Special Topology Zero..................................6
      2.2 Links and Multi-Topology...............................6
      2.3 TRILL Switches and Multi-Topology......................6
      2.4 TRILL Data Packets and Multi-Topology..................7
      2.4.1 Explicit Topology Labeling Support...................7
      2.4.2 The Explicit Topology Label..........................8
      2.4.3 TRILL Use of the MT Label............................9

      3. TRILL Multi-Topology Adjacency and Routing.............11
      3.1 Adjacency (Updates to RFC 7177).......................11
      3.2 TRILL Switch Nicknames................................11
      3.3 TRILL Unicast Routing.................................12
      3.4 TRILL Multi-Destination Routing.......................12
      3.4.1 Distribution Trees..................................12
      3.4.2 Multi-Access Links..................................14

      4. Mixed Links............................................15

      5. Other Multi-Topology Considerations....................16
      5.1 Address Learning......................................16
      5.1.1 Data Plane Learning.................................16
      5.1.2 Multi-Topology ESADI................................16
      5.2 Legacy Stubs..........................................16
      5.3 RBridge Channel Messages..............................16
      5.4 Implementations Considerations........................17

      6. Allocation Considerations..............................18
      6.1 IEEE Registration Authority Considerations............18
      6.2 IANA Considerations...................................18

      7. Security Considerations................................19

      Normative References......................................20
      Informative References....................................21

      Acknowledgements..........................................22
      Appendix A: Differences from RFC 5120.....................23
      Authors' Addresses........................................24

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
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