White Papers

A New Pre-Emption Policy for MPLS-TE Networks

Overview The pre-emption mechanism may be used in Multi Protocol Label Switching Traffic Engineering (MPLS-TE) networks in order to reduce the number of rejected tunnels during failure. But pre-emption may have an impact on the convergence time, and it is required to minimize the number of pre-emptions per tunnel. For that purpose this paper proposes a new preemption policy allowing reducing or limiting the number of preemptions per tunnel, after a network failure. Two approaches are proposed: A pre-emption reduction approach where the least preempted tunnels are pre-empted in priority and a pre-emption limitation approach where a tunnel cannot be preempted more than N times during a given period.

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Publisher: French National Institute for Research in Computer Science and Control
File Format: PDF
Date Published: Apr 1, 2009
Format: White Papers
Topics: MPLS

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