RBridges: TRILL Link Data Optimizations
draft-perlman-trill-rbridge-data-encoding-04

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TRILL Working Group                                        Radia Perlman
INTERNET-DRAFT                                                       EMC
Updates: 6325                                            Donald Eastlake
Intended status: Proposed Standard                             Yizhou Li
                                                                  Huawei
                                                          Anoop Ghanwani
                                                                    Dell
Expires: March 27, 2016                               September 28, 2015

                RBridges: TRILL Link Data Optimizations
           <draft-perlman-trill-rbridge-data-encoding-04.txt>

Abstract

   TRILL (TRansparent Interconnection of Lots of Links) Data frames can
   be encoded so as to make more efficient use of communications links
   under certain circumstances.  This document specifies two such
   optional optimizations.  One, called Compact Format, improves the
   compactness of encoding where a TRILL link is a point-to-point
   Ethernet link.  The other, called Specific Addressing, optionally
   decreases the burden on multi-access TRILL links for multi-
   destination TRILL Data frames. This document updates RFC 6325.

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 <trill@ietf.org>.

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R. Perlman, et al                                               [Page 1]
INTERNET-DRAFT                            TRILL: Link Data Optimizations

Table of Contents

      1. Introduction............................................3
      1.1 Structure of This Document.............................3
      1.2 Terminology Used in This Document......................4

      2. TRILL Frame Formats.....................................5
      2.1 The General TRILL Frame Format.........................5
      2.2 Ethernet Link TRILL Data Frame General Encapsulation...6

      3. Compact Format for Point-to-Point Ethernet Links........8
      3.1 Conditions for Using Compact Format....................8
      3.2 RBridge Originated and Terminated Native Frames.......10
      3.3 Compact TRILL Data Reception and Transmission.........10
      3.3.1 Compact TRILL Data Frame Reception..................10
      3.3.2 Compact TRILL Data Frame Transmission...............12
      3.4 Announcing Support for Compact Format.................12

      4. Specific Addressing....................................13
      4.1 Current Multi-Destination Addressing..................13
      4.2 Specific Addressing Specification.....................13
      4.3 Announcing Support for Specific Addressing............13

      5. Interaction Between The Optimizations..................15
      6. IANA Considerations....................................16

      7. Security Considerations................................17
      7.1 Compact Format Security Considerations................17
      7.2 Specific Addressing Security Considerations...........17
      7.3 Results of Frame Misinterpretation....................17

      8. References.............................................19
      8.1 Normative References..................................19
      8.2 Informative References................................19

      Authors' Addresses........................................21

R. Perlman, et al                                               [Page 2]
INTERNET-DRAFT                            TRILL: Link Data Optimizations

1. Introduction

   TRILL switches (also called RBridges (Routing Bridges)) are devices
   that support the IETF TRILL (TRansparent Interconnection of Lots of
   Links) protocol [RFC6325] [RFC7177] [rfc7180bis]. They provide
   transparent forwarding of frames in multi-hop networks with arbitrary
   topology and link technology using least cost paths for unicast
   traffic, support VLANs (Virtual Local Area Networks) and 24-bit Fine
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