A New Internet-Draft is available from the on-line Internet-Drafts directories.
Title : The Application of the Path Computation Element Architecture to the Determination of a Sequence of Domains in MPLS & GMPLS
Author(s) : D. King, A. Farrel
Filename : draft-king-pce-hierarchy-fwk-00.txt
Pages : 16
Date : 2009-05-18
Computing optimum routes for Label Switched Paths (LSPs) across
multiple domains in Multiprotocol Label Switching Traffic Engineering
(MPLS-TE) and Generalized MPLS (GMPLS) networks presents a problem
because no single point of path computation is aware of all of the
links and resources in each domain. A solution may be achieved using
the Path Computation Element (PCE) architecture.
Where the sequence of domains is known, a priori, various techniques
can be employed to derive an optimum path. If the domains are
simply- connected, or if the preferred points of interconnection are
also known, the Per-Domain Path Computation technique can be used.
Where there are multiple connections between domains and there is
no preference for the choice of points of interconnection, the
Backward Recursive Path Computation Procedure (BRPC) can be used.
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