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BCP 87
RFC 3785
Title: Use of Interior Gateway Protocol (IGP) Metric
as a second MPLS Traffic Engineering (TE) Metric
Author(s): F. Le Faucheur, R. Uppili, A. Vedrenne, P. Merckx,
T. Telkamp
Status: Best Current Practice
Date: May 2004
Mailbox: flefauch@cisco.com, ruppili@cisco.com,
alain.vedrenne@equant.com,
pierre.merckx@equant.com, telkamp@gblx.net
Pages: 8
Characters: 17475
SeeAlso: BCP 87
I-D Tag: draft-ietf-tewg-te-metric-igp-02.txt
URL: ftp://ftp.rfc-editor.org/in-notes/rfc3785.txt
This document describes a common practice on how the existing metric
of Interior Gateway Protocols (IGP) can be used as an alternative
metric to the Traffic Engineering (TE) metric for Constraint Based
Routing of MultiProtocol Label Switching (MPLS) Traffic Engineering
tunnels. This effectively results in the ability to perform
Constraint Based Routing with optimization of one metric (e.g., link
bandwidth) for some Traffic Engineering tunnels (e.g., Data Trunks)
while optimizing another metric (e.g., propagation delay) for some
other tunnels with different requirements (e.g., Voice Trunks). No
protocol extensions or modifications are required. This text
documents current router implementations and deployment practices.
This document is a product of the Internet Traffic Engineering Working
Group of the IETF.
This document specifies an Internet Best Current Practices for the
Internet Community, and requests discussion and suggestions for
improvements. Distribution of this memo is unlimited.
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