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Requirements for Advanced Multipath in MPLS Networks
draft-ietf-rtgwg-cl-requirement-16

Document type: Active Internet-Draft (rtgwg WG)
Document stream: IETF
Last updated: 2014-02-11 (latest revision 2014-02-06)
Intended RFC status: Informational
Other versions: plain text, xml, pdf, html

IETF State: Submitted to IESG for Publication
Consensus: Yes
Document shepherd: Alia Atlas
Shepherd Write-Up: Last changed 2013-11-25

IESG State: RFC Ed Queue
IANA Action State: No IC
RFC Editor State: RFC-EDITOR
Responsible AD: Alia Atlas
Send notices to: rtgwg-chairs@tools.ietf.org, draft-ietf-rtgwg-cl-requirement@tools.ietf.org

RTGWG                                                 C. Villamizar, Ed.
Internet-Draft                                                OCCNC, LLC
Intended status: Informational                           D. McDysan, Ed.
Expires: August 10, 2014                                         Verizon
                                                                 S. Ning
                                                     Tata Communications
                                                                A. Malis
                                                                  Huawei
                                                                 L. Yong
                                                              Huawei USA
                                                       February 06, 2014

          Requirements for Advanced Multipath in MPLS Networks
                   draft-ietf-rtgwg-cl-requirement-16

Abstract

   This document provides a set of requirements for Advanced Multipath
   in MPLS Networks.

   Advanced Multipath is a formalization of multipath techniques
   currently in use in IP and MPLS networks and a set of extensions to
   existing multipath techniques.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
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   Drafts is at http://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   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."

   This Internet-Draft will expire on August 10, 2014.

Copyright Notice

   Copyright (c) 2014 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Villamizar, et al.       Expires August 10, 2014                [Page 1]
Internet-Draft       Advanced Multipath Requirements       February 2014

   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.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Requirements Language . . . . . . . . . . . . . . . . . .   3
   2.  Definitions . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Functional Requirements . . . . . . . . . . . . . . . . . . .   6
     3.1.  Availability, Stability and Transient Response  . . . . .   6
     3.2.  Component Links Provided by Lower Layer Networks  . . . .   8
     3.3.  Component Links with Different Characteristics  . . . . .   8
     3.4.  Considerations for Bidirectional Client LSP . . . . . . .   9
     3.5.  Multipath Load Balancing Dynamics . . . . . . . . . . . .  10
   4.  General Requirements for Protocol Solutions . . . . . . . . .  12
   5.  Management Requirements . . . . . . . . . . . . . . . . . . .  13
   6.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  14
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  14
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .  14
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  15
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .  15
     9.2.  Informative References  . . . . . . . . . . . . . . . . .  15
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  16

1.  Introduction

   There is often a need to provide large aggregates of bandwidth that
   are best provided using parallel links between routers or carrying
   traffic over multiple MPLS Label Switched Paths (LSPs).  In core
   networks there is often no alternative since the aggregate capacities
   of core networks today far exceed the capacity of a single physical
   link or single packet processing element.

   The presence of parallel links, with each link potentially comprised
   of multiple layers has resulted in additional requirements.  Certain
   services may benefit from being restricted to a subset of the
   component links or a specific component link, where component link
   characteristics, such as latency, differ.  Certain services require

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