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TRILL: Header Extension
draft-ietf-trill-rbridge-extension-05

Document type: Active Internet-Draft (trill WG)
Document stream: IETF
Last updated: 2012-07-10 (latest revision 2012-06-20)
Intended RFC status: Proposed Standard
Other versions: plain text, pdf, html

IETF State: Submitted to IESG for Publication
Consensus: Unknown
Document shepherd: No shepherd assigned

IESG State: RFC Ed Queue
RFC Editor State: AUTH48
Responsible AD: Ralph Droms
IESG Note: Erik Nordmark (nordmark@acm.org) is the document shepherd.
Send notices to: trill-chairs@tools.ietf.org, draft-ietf-trill-rbridge-extension@tools.ietf.org

TRILL Working Group                                      Donald Eastlake
INTERNET-DRAFT                                                    Huawei
Intended status: Proposed Standard                        Anoop Ghanwani
Updates: 6325                                                       Dell
                                                          Vishwas Manral
                                                                      HP
                                                               Yizhou Li
                                                                  Huawei
                                                         Caitlin Bestler
                                                                 Quantum
Expires: December 19, 2012                                 June 20, 2012

                        TRILL: Header Extension
              <draft-ietf-trill-rbridge-extension-05.txt>

Abstract

   The IETF TRILL (Transparent Interconnection of Lots of Links) base
   protocol specifies minimal hooks to safely support TRILL Header
   extensions. This document specifies an initial extension providing
   additional flag bits and specifies some of those bits. It 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 <rbridge@postel.org>.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF), its areas, and its working groups.  Note that
   other groups may also distribute working documents as Internet-
   Drafts.

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   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   The list of current Internet-Drafts can be accessed at
   http://www.ietf.org/1id-abstracts.html. The list of Internet-Draft
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   http://www.ietf.org/shadow.html.

D. Eastlake, et al                                              [Page 1]
INTERNET-DRAFT                                   TRILL: Header Extension

Table of Contents

      1. Introduction............................................3
      1.1 Conventions used in this document......................3

      2. TRILL Header Extensions.................................4
      2.1 RBridge Extended Flag Handling Requirements............5
      2.2 No Critical Surprises..................................5
      2.3 Extended Header Flags..................................6
      2.3.1 Critical Summary Bits................................7
      2.4 Conflict of Extensions.................................8

      3. Specific Extended Header Flags..........................9
      3.1 The RBridge Channel Alert Extended Flags...............9

      4. Additions to IS-IS.....................................10

      5. IANA Considerations....................................10
      6. Security Considerations................................11
      7. Acknowledgements.......................................11
      8. Normative References...................................12
      9. Informative References.................................12

      Change History............................................13

D. Eastlake, et al                                              [Page 2]
INTERNET-DRAFT                                   TRILL: Header Extension

1. Introduction

   The base IETF TRILL (Transparent Interconnection of Lots of Links)
   protocol [RFC6325] [RFC6326bis] provides a TRILL Header extension
   feature and describes minimal hooks to safely support header
   extension. (This feature is called "options" in Section 3.8 of
   [RFC6325].) But, except for the first two bits, the TRILL base
   protocol document does not specify the structure of extensions to the
   TRILL Header nor the details of any particular extension.

   This document is consistent with [RFC6325] and provides further
   details. It specifies an initial extension word providing additional
   flag bits and specifies some of those bits. Additional extensions,
   including TLV (Type, Length, Value) encoded options, may be specified
   in later documents, for example [Options].

   Section 2 below describes some general principles of TRILL header
   extensions and an initial extension.  Section 3 specifies pair of
   flags in this initial extension.

1.1 Conventions used in this document

   The terminology and acronyms defined in [RFC6325] are used herein
   with the same meaning. Devices implementing the TRILL protocol are

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