A New Internet-Draft is available from the on-line Internet-Drafts directories.
Title : Reoptimization of an explicit loosely routed MPLS TE
paths
Author(s) : J. Vasseur, Y. Ikejiri
Filename : draft-vasseur-mpls-loose-path-reopt-01.txt
Pages : 9
Date : 2003-2-27
The aim of this document is to propose a mechanism for the
reoptimization of loosely routed explicit paths. A loosely routed
explicit path is as a path specified as a combination of strict and
loose hop(s) that contains at least one loose hop and zero or more
strict hop(s). The path calculation (ERO expansion) to reach a loose
hop is made on the previous hop defined in the TE LSP path. This draft
proposes a mechanism that allows
- the TE LSP Head-end LSR to trigger a reoptimization on every loose
hops along the path,
- an LSR to signal to the TE LSP head-end that a better path exists
to reach a loose than the path in use. A better path is defined as a
path with a lower cost, where the cost is defined by the metric used
to compute the path.
This primarily applies to inter-area TE when the path is defined as a
list of loose hops (generally the loose hops are the ABRs) but the
following mechanism is also applicable to any loosely routed explicit
paths within a single routing domain.
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