Transparent Interconnection of Lots of Links (TRILL): Clarifications, Corrections, and Updates
RFC 7780

Document Type RFC - Proposed Standard (February 2016; No errata)
Obsoletes RFC 7180
Last updated 2016-02-25
Replaces draft-eastlake-trill-rfc7180bis
Stream IETF
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IESG IESG state RFC 7780 (Proposed Standard)
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Internet Engineering Task Force (IETF)                   D. Eastlake 3rd
Request for Comments: 7780                                      M. Zhang
Obsoletes: 7180                                                   Huawei
Updates: 6325, 7177, 7179                                     R. Perlman
Category: Standards Track                                            EMC
ISSN: 2070-1721                                              A. Banerjee
                                                                   Cisco
                                                             A. Ghanwani
                                                                    Dell
                                                                S. Gupta
                                                             IP Infusion
                                                           February 2016

         Transparent Interconnection of Lots of Links (TRILL):
                Clarifications, Corrections, and Updates

Abstract

   Since the publication of the TRILL (Transparent Interconnection of
   Lots of Links) base protocol in 2011, active development and
   deployment of TRILL have revealed errata in RFC 6325 and areas that
   could use clarifications or updates.  RFC 7177, RFC 7357, and an
   intended replacement of RFC 6439 provide clarifications and updates
   with respect to adjacency, the TRILL ESADI (End Station Address
   Distribution Information) protocol, and Appointed Forwarders,
   respectively.  This document provides other known clarifications,
   corrections, and updates.  It obsoletes RFC 7180 (the previous "TRILL
   clarifications, corrections, and updates" RFC), and it updates RFCs
   6325, 7177, and 7179.

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Further information on
   Internet Standards is available in Section 2 of RFC 5741.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/rfc7780.

Eastlake, et al.             Standards Track                    [Page 1]
RFC 7780       TRILL Clarifications, Corrections, Updates  February 2016

Copyright Notice

   Copyright (c) 2016 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
   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.

Eastlake, et al.             Standards Track                    [Page 2]
RFC 7780       TRILL Clarifications, Corrections, Updates  February 2016

Table of Contents

   1. Introduction (Changed) ..........................................5
      1.1. Precedence (Changed) .......................................5
      1.2. Changes That Are Not Backward Compatible (Unchanged) .......6
      1.3. Terminology and Acronyms (Changed) .........................6
   2. Overloaded and/or Unreachable RBridges (Unchanged) ..............7
      2.1. Reachability ...............................................8
      2.2. Distribution Trees .........................................8
      2.3. Overloaded Receipt of TRILL Data Packets ...................9
           2.3.1. Known Unicast Receipt ...............................9
           2.3.2. Multi-Destination Receipt ...........................9
      2.4. Overloaded Origination of TRILL Data Packets ...............9
           2.4.1. Known Unicast Origination ..........................10
           2.4.2. Multi-Destination Origination ......................10
                  2.4.2.1. An Example Network ........................10
                  2.4.2.2. Indicating OOMF Support ...................11
                  2.4.2.3. Using OOMF Service ........................11
   3. Distribution Trees and RPF Check (Changed) .....................12
      3.1. Number of Distribution Trees (Unchanged) ..................12
      3.2. Distribution Tree Update Clarification (Unchanged) ........12
      3.3. Multicast Pruning Based on IP Address (Unchanged) .........13
      3.4. Numbering of Distribution Trees (Unchanged) ...............13
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