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Problem Statement and Architecture for Information Exchange between Interconnected Traffic-Engineered Networks (RFC7926) Disclosure Number: IPCOM000247020D
Original Publication Date: 2016-Jul-01
Included in the Prior Art Database: 2016-Jul-27

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

A. Farrel: AUTHOR [+7]


Traffic-Engineered (TE) systems such as MPLS-TE [RFC2702] and GMPLS [RFC3945] offer a way to establish paths through a network in a controlled way that reserves network resources on specified links. TE paths are computed by examining the Traffic Engineering Database (TED) and selecting a sequence of links and nodes that are capable of meeting the requirements of the path to be established. The TED is constructed from information distributed by the Interior Gateway Protocol (IGP) running in the network -- for example, OSPF-TE [RFC3630] or ISIS-TE [RFC5305].

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Internet Engineering Task Force (IETF)                    A. Farrel, Ed. Request for Comments: 7926                                      J. Drake BCP: 206                                                Juniper Networks Category: Best Current Practice                                 N. Bitar ISSN: 2070-1721                                                    Nokia                                                               G. Swallow                                                      Cisco Systems, Inc.                                                            D. Ceccarelli                                                                 Ericsson                                                                 X. Zhang                                                                   Huawei                                                                July 2016

       Problem Statement and Architecture for Information Exchange            between Interconnected Traffic-Engineered Networks


   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 networks 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.  TE    information is usually only available within a network.  We call such    a zone of visibility of TE information a domain.  An example of a    domain may be an IGP area or an Autonomous System.

   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 for the exchange of TE    information between interconnected TE networks in support of end-to-    end TE path establishment and describes the best current practice    architecture to meet this problem statement.  For reasons that are    explained in this document, this work is limited to...