Problem Statement and Architecture for Information Exchange Between Interconnected Traffic Engineered Networks
draft-farrel-interconnected-te-info-exchange-03

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Document Type Active Internet-Draft (individual)
Authors Adrian Farrel  , John Drake  , Nabil Bitar  , George Swallow  , Daniele Ceccarelli 
Last updated 2014-02-14
Replaced by draft-ietf-ccamp-interconnected-te-info-exchange
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Network Working Group                                          A. Farrel
Internet-Draft                                                  J. Drake
Intended status: Standards Track                        Juniper Networks
Expires: August 14, 2014
                                                                N. Bitar
                                                        Verizon Networks

                                                              G. Swallow
                                                     Cisco Systems, Inc.

                                                           D. Ceccarelli
                                                                Ericsson
                                                       February 14, 2014

     Problem Statement and Architecture for Information Exchange
         Between Interconnected Traffic Engineered Networks

         draft-farrel-interconnected-te-info-exchange-03.txt

Abstract

   In Traffic Engineered (TE) systems, it is sometimes desirable to
   establish an end-to-end TE path with a set of constraints (such as
   bandwidth) across one or more network from a source to a destination.
   TE information is the data relating to nodes and TE links that is
   used in the process of selecting a TE path.  The availability of TE
   information is usually limited to within a network (such as an IGP
   area) often referred to as a domain.

   In order to determine the potential to establish a TE path through a
   series of connected networks, it is necessary to have available a
   certain amount of TE information about each network.  This need not
   be the full set of TE information available within each network, but
   does need to express the potential of providing TE connectivity. This
   subset of TE information is called TE reachability information.

   This document sets out the problem statement and architecture for the
   exchange of TE information between interconnected TE networks in
   support of end-to-end TE path establishment.  For reasons that are
   explained in the document, this work is limited to simple TE
   constraints and information that determine TE reachability.

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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Internet-Draft  Information Exchange Between TE Networks   February 2014

   working documents as Internet-Drafts.  The list of current Internet-
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Internet-Draft  Information Exchange Between TE Networks   February 2014

Table of Contents

   1.  Introduction .................................................  5
   1.1.  What is TE Reachability? ...................................  6
   2.  Overview of Use Cases ........................................  6
   2.1.  Peer Networks ..............................................  6
   2.1.1.  Where is the Destination? ................................  7
   2.2.  Client-Server Networks .....................................  8
   2.3.  Dual-Homing ................................................ 10
   3.  Problem Statement ............................................ 11
   3.1.  Use of Existing Protocol Mechanisms ........................ 12
   3.2.  Policy and Filters ......................................... 12
   3.3.  Confidentiality ............................................ 13
   3.4.  Information Overload ....................................... 13
   3.5.  Issues of Information Churn ................................ 14
   3.6.  Issues of Aggregation ...................................... 15
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