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Use of the Synchronization VECtor (SVEC) List for Synchronized Dependent Path Computations
RFC 6007

Document type: RFC - Informational (September 2010; No errata)
Document stream: IETF
Last updated: 2013-03-02
Other versions: plain text, pdf, html

IETF State: (None)
Consensus: Unknown
Document shepherd: No shepherd assigned

IESG State: RFC 6007 (Informational)
Responsible AD: Adrian Farrel
Send notices to: pce-chairs@tools.ietf.org, draft-ietf-pce-pcep-svec-list@tools.ietf.org

Internet Engineering Task Force (IETF)                       I. Nishioka
Request for Comments: 6007                                     NEC Corp.
Category: Informational                                          D. King
ISSN: 2070-1721                                       Old Dog Consulting
                                                          September 2010

           Use of the Synchronization VECtor (SVEC) List for
                Synchronized Dependent Path Computations

Abstract

   A Path Computation Element (PCE) may be required to perform dependent
   path computations.  Dependent path computations are requests that
   need to be synchronized in order to meet specific objectives.  An
   example of a dependent request would be a PCE computing a set of
   services that are required to be diverse (disjointed) from each
   other.  When a PCE computes sets of dependent path computation
   requests concurrently, use of the Synchronization VECtor (SVEC) list
   is required for association among the sets of dependent path
   computation requests.  The SVEC object is optional and carried within
   the Path Computation Element Communication Protocol (PCEP) PCRequest
   (PCReq) message.

   This document does not specify the PCEP SVEC object or procedure.
   This informational document clarifies the use of the SVEC list for
   synchronized path computations when computing dependent requests.
   The document also describes a number of usage scenarios for SVEC
   lists within single-domain and multi-domain environments.

Status of This Memo

   This document is not an Internet Standards Track specification; it is
   published for informational purposes.

   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).  Not all documents
   approved by the IESG are a candidate for any level of Internet
   Standard; see 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/rfc6007.

Nishioka & King               Informational                     [Page 1]
RFC 6007             SVEC List for Path Computations      September 2010

Copyright Notice

   Copyright (c) 2010 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
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   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.

Nishioka & King               Informational                     [Page 2]
RFC 6007             SVEC List for Path Computations      September 2010

Table of Contents

   1. Introduction ....................................................3
      1.1. SVEC Object ................................................4
      1.2. Application of SVEC Lists ..................................5
   2. Terminology .....................................................6
   3. SVEC Association Scenarios ......................................7
      3.1. Synchronized Computation for Diverse Path Requests .........7
      3.2. Synchronized Computation for Point-to-Multipoint
           Path Requests ..............................................8
   4. SVEC Association ................................................9
      4.1. SVEC List ..................................................9
      4.2. Associated SVECs ...........................................9
      4.3. Non-Associated SVECs ......................................10

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