Name: draft-ogino-pce-recovery-pc-model-00
Title: Path Computation Model for Recovery LSPs Using External PCE
State: Active
Authors: Nagao Ogino
Group: Individual Submissions (none)
Date: 2004-10-01
This document proposes a PC model, where the recovery LSP route in a domain
is computed using an external PCE. Recovery LSP computation that promotes
bandwidth sharing between other recovery LSPs requires unreserved bandwidth
information that corresponds to each failure position or SRLG. However, the
present IGP-TE can only advertise unreserved bandwidth information
corresponding to eight priority classes to each LSR involved in an IGP
area. An external PCE in a domain can compute efficient recovery LSP routes
by exclusively preserving such unreserved bandwidth information without any
extension of the present IGP-TE.
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