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-00.txt
Pages : 9
Date : 2003-4-18
This draft documents MPLS TE Soft Preemption, a suite of protocol
modifications extending the current concept of preemption with the goal
of reducing/eliminating traffic disruption of preempted TE LSPs. Under
present RSVP-TE signaling methods, LSPs are immediately displaced upon
preemption. The introduction of a new preemption pending flag helps
more gracefully mitigate the re-route process of displaced LSPs. For
the brief period soft preemption is activated, reservations (though not
necessarily traffic levels) are in effect overbooked until the LSP can
be re-routed. For this reason, the feature is primarily interesting in
packet oriented MPLS networks with Diffserv and TE capabilities.
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