A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Multiprotocol Label Switching Working Group of the IETF.
Title : MPLS Traffic Engineering Soft preemption
Author(s) : M. Meyer, et al.
Filename : draft-ietf-mpls-soft-preemption-04.txt
Pages : 12
Date : 2005-4-1
This document details MPLS Traffic Engineering Soft Preemption, a suite
of protocol modifications extending the concept of preemption with the
goal of reducing/eliminating traffic disruption of preempted Traffic
Engineered Label Switched Paths. Initially MPLS RSVP-TE was defined
supporting only immediate Label Switched Path displacement upon
preemption. The utilization of a preemption pending flag helps more
gracefully mitigate the re-route process of preempted Label Switched
Paths. For the brief period soft preemption is activated, reservations
(though not necessarily traffic levels) are in effect under-provisioned
until the Label Switched Path can be re-routed. For this reason, the
feature is primarily but not exclusively interesting in MPLS enabled IP
networks with Differentiated Services and Traffic Engineering
capabilities.
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