A New Internet-Draft is available from the on-line Internet-Drafts
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Title : PCEP Extensions for Temporary Reservation of Computed Path Resources and Support for Limited Context State in PCE
Author(s) : O. Gonzalez de Dios, F. Javier Jimenez Chico, R. Casellas
Filename : draft-gonzalezdedios-pce-resv-res-context-state-00.txt
Pages : 18
Date : 2010-10-15
The Path Computation Element (PCE) provides path computation
functions in support of traffic engineering in Multi-Protocol Label
Switching (MPLS) and Generalized MPLS (GMPLS) networks.
A limited form of statefulness is useful to improve PCE functionality
in situations in which the local TED might not be up to date, or in
the case of concurrent requests where most of the LSPs are computed
before the end of the set-up of the LSPs when the TED is updated.
The PCE can retain some context from the resources assigned to Path
Requests during a certain period of time, so that it avoids
suggesting the use of the same resources for subsequent TE LSPs.
This document proposes an extension to the PCEP protocol to allow the
PCC to request the PCE to block or reserve the resources computed in
a path request of a TE LSP for subsequent requests for a certain
time.
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