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This draft is a work item of the Path Computation Element Working Group of the IETF.
Title : A Backward Recursive PCE-based Computation
(BRPC) procedure to compute shortest inter-
domain Traffic Engineering Label Switched Paths
Author(s) : J. Vasseur
Filename : draft-ietf-pce-brpc-02.txt
Pages : 16
Date : 2006-12-15
The ability to compute constrained shortest Traffic Engineering (TE)
Label Switched Paths (LSPs) in Multiprotocol Label Switching (MPLS)
and Generalized MPLS (GMPLS) networks across multiple domains (where
a domain is referred to as a collection of network elements within a
common sphere of address management or path computational
responsibility such as IGP areas and Autonomous Systems) has been
identified as a key requirement . This document specifies a
procedure relying on the use of multiple Path Computation Elements
(PCEs) in order to compute such inter-domain shortest constraint
paths along a determined sequence of domains, using a backward
recursive path computation technique while preserving confidentiality
across domains, which is sometimes required when domains are managed
by different Service Providers.
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