IS-IS Flooding Scope Link State PDUs (LSPs)
RFC 7356

 
Document
Type RFC - Proposed Standard (September 2014; No errata)
Last updated 2014-09-02
Replaces draft-ginsberg-isis-fs-lsp
Stream IETF
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Stream
WG state Submitted to IESG for Publication
Consensus Yes
Document shepherd Christian Hopps
Shepherd write-up Show (last changed 2014-04-08)
IESG
IESG state RFC 7356 (Proposed Standard)
Telechat date
Responsible AD Alia Atlas
Send notices to isis-chairs@ietf.org, draft-ietf-isis-fs-lsp@ietf.org
IANA
IANA review state IANA - Not OK
IANA action state RFC-Ed-Ack

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Internet Engineering Task Force (IETF)                       L. Ginsberg
Request for Comments: 7356                                    S. Previdi
Category: Standards Track                                        Y. Yang
ISSN: 2070-1721                                            Cisco Systems
                                                          September 2014

              IS-IS Flooding Scope Link State PDUs (LSPs)

Abstract

   Intermediate System to Intermediate System (IS-IS) provides efficient
   and reliable flooding of information to its peers; however, the
   current flooding scopes are limited to either area scope or domain
   scope.  There are existing use cases where support of other flooding
   scopes is desirable.  This document defines new Protocol Data Units
   (PDUs) that provide support for new flooding scopes as well as
   additional space for advertising information targeted for the
   currently supported flooding scopes.  This document also defines
   extended Type-Length-Values (TLVs) and sub-TLVs that are encoded
   using 16-bit fields for Type and Length.

   The protocol extensions defined in this document are not backwards
   compatible with existing implementations and so must be deployed with
   care.

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/rfc7356.

Ginsberg, et al.             Standards Track                    [Page 1]
RFC 7356                IS-IS Flooding Scope LSPs         September 2014

Copyright Notice

   Copyright (c) 2014 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.

   This document may contain material from IETF Documents or IETF
   Contributions published or made publicly available before November
   10, 2008.  The person(s) controlling the copyright in some of this
   material may not have granted the IETF Trust the right to allow
   modifications of such material outside the IETF Standards Process.
   Without obtaining an adequate license from the person(s) controlling
   the copyright in such materials, this document may not be modified
   outside the IETF Standards Process, and derivative works of it may
   not be created outside the IETF Standards Process, except to format
   it for publication as an RFC or to translate it into languages other
   than English.

Ginsberg, et al.             Standards Track                    [Page 2]
RFC 7356                IS-IS Flooding Scope LSPs         September 2014

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Requirements Language . . . . . . . . . . . . . . . . . .   5
   2.  Extended TLVs . . . . . . . . . . . . . . . . . . . . . . . .   5
     2.1.  Use of Extended TLVs and Extended Sub-TLVs  . . . . . . .   5
     2.2.  Use of Standard Code Points in Extended TLVs and Extended
           Sub-TLVs  . . . . . . . . . . . . . . . . . . . . . . . .   6
   3.   Definition of New PDUs . . . . . . . . . . . . . . . . . . .   6
     3.1.  Flooding Scoped LSP Format  . . . . . . . . . . . . . . .   7
     3.2.  Flooding Scoped CSNP Format . . . . . . . . . . . . . . .  10
     3.3.  Flooding Scope PSNP Format  . . . . . . . . . . . . . . .  12
   4.  Flooding Scope Update Process Operation . . . . . . . . . . .  13
     4.1.  Scope Types . . . . . . . . . . . . . . . . . . . . . . .  14
     4.2.  Operation on Point-to-Point Circuits  . . . . . . . . . .  14
     4.3.  Operation on Broadcast Circuits . . . . . . . . . . . . .  14
     4.4.  Use of Authentication . . . . . . . . . . . . . . . . . .  15
     4.5.  Priority Flooding . . . . . . . . . . . . . . . . . . . .  15
   5.  Deployment Considerations . . . . . . . . . . . . . . . . . .  15
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