Problem Statement and Architecture for Information Exchange Between Interconnected Traffic Engineered Networks
draft-ietf-teas-interconnected-te-info-exchange-03
Network Working Group A. Farrel (Ed.)
Internet-Draft J. Drake
Intended status: Standards Track Juniper Networks
Expires: April 15, 2016
N. Bitar
Verizon Networks
G. Swallow
Cisco Systems, Inc.
D. Ceccarelli
Ericsson
X. Zhang
Huawei
October 15, 2015
Problem Statement and Architecture for Information Exchange
Between Interconnected Traffic Engineered Networks
draft-ietf-teas-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. 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 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.
Farrel, et al. [Page 1]
Internet-Draft Information Exchange Between TE Networks July 2015
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Farrel, et al. [Page 2]
Internet-Draft Information Exchange Between TE Networks July 2015
Table of Contents
1. Introduction ................................................. 5
1.1. Terminology ................................................ 6
1.1.1. TE Paths and TE Connections .............................. 6
1.1.2. TE Metrics and TE Attributes ............................. 6
1.1.3. TE Reachability .......................................... 6
1.1.4. Domain ................................................... 7
1.1.5. Aggregation .............................................. 7
1.1.6. Abstraction .............................................. 7
1.1.7. Abstract Link ............................................ 7
1.1.8. Abstraction Layer Network ................................ 8
2. Overview of Use Cases ........................................ 8
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