draft-ietf-tewg-te-metric-igp-01.txt   draft-ietf-tewg-te-metric-igp-02.txt 
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Alain Vedrenne Alain Vedrenne
Pierre Merckx Pierre Merckx
Equant Equant
Thomas Telkamp Thomas Telkamp
Global Crossing Global Crossing
IETF Internet Draft IETF Internet Draft
Expires: March, 2003 Expires: March, 2003
Document: draft-ietf-tewg-te-metric-igp-01.txt September, 2002 Document: draft-ietf-tewg-te-metric-igp-02.txt September, 2002
Use of Interior Gateway Protocol Metric as a second Use of Interior Gateway Protocol (IGP) Metric as a second
MPLS Traffic Engineering Metric MPLS Traffic Engineering Metric
Status of this Memo Status of this Memo
This document is an Internet-Draft and is in full conformance with This document is an Internet-Draft and is in full conformance with
all provisions of Section 10 of RFC2026. Internet-Drafts are all provisions of Section 10 of RFC2026. Internet-Drafts are
Working documents of the Internet Engineering Task Force (IETF), its Working documents of the Internet Engineering Task Force (IETF), its
areas, and its working groups. Note that other groups may also areas, and its working groups. Note that other groups may also
distribute working documents as Internet-Drafts. distribute working documents as Internet-Drafts.
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material or to cite them other than as "work in progress." material or to cite them other than as "work in progress."
The list of current Internet-Drafts can be accessed at The list of current Internet-Drafts can be accessed at
http://www.ietf.org/ietf/1id-abstracts.txt. http://www.ietf.org/ietf/1id-abstracts.txt.
The list of Internet-Draft Shadow Directories can be accessed at The list of Internet-Draft Shadow Directories can be accessed at
http://www.ietf.org/shadow.html. http://www.ietf.org/shadow.html.
Abstract Abstract
This document describes a common practice on how the existing metric This document describes a common practice on how the existing metric
of Interior Gateway Protocols can be used as an alternative metric of Interior Gateway Protocols (IGP) can be used as an alternative
to the Traffic Engineering metric for Constraint Based Routing of metric to the Traffic Engineering (TE) metric for Constraint Based
MultiProtocol Label Switching Traffic Engineering tunnels. This Routing of MultiProtocol Label Switching (MPLS) Traffic Engineering
effectively results in the ability to perform Constraint Based tunnels. This effectively results in the ability to perform
Routing with optimization of one metric (e.g. link bandwidth) for Constraint Based Routing with optimization of one metric (e.g. link
some Traffic Engineering tunnels (e.g. Data Trunks) while optimizing bandwidth) for some Traffic Engineering tunnels (e.g. Data Trunks)
another metric (e.g. propagation delay) for some other tunnels with while optimizing another metric (e.g. propagation delay) for some
different requirements (e.g. Voice Trunks). other tunnels with different requirements (e.g. Voice Trunks).
Le Faucheur, et. al 1 Le Faucheur, et. al 1
IGP Metric as second TE Metric September 2002 IGP Metric as second TE Metric September 2002
No protocol extensions or modifications are required. This text No protocol extensions or modifications are required. This text
documents current router implementations and deployment practices. documents current router implementations and deployment practices.
1. Introduction 1. Introduction
 End of changes. 

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