Patent ID: 8605619
Filing Date: 2013-12-10
Classification: H04L

Abstract:
1. A method comprising: receiving, at a node of a computer network, a request to establish a traffic engineering (TE) label switched path (LSP); accessing a pre-defined range of preemption-priority values that may be used with the requested TE-LSP, the range of preemption-priority values spanning from a lowest preemption-priority value that may be used with the requested TE-LSP to a highest preemption-priority value that may be used with the requested TE-LSP; determining a preemption-priority value to use with the requested TE-LSP, the determined preemption-priority value to be a lowest value within the pre-defined range of preemption-priority values at which adequate network resources to accommodate the requested TE-LSP would be available; signaling the requested TE-LSP with the determined preemption-priority value to one or more other nodes within the computer network; receiving notifications from the one or more other nodes within the computer network indicating information about other TE-LSPs that would be preempted if the requested TE-LSP were established at the determined preemption-priority value; and in response to the information regarding other TE-LSPs that would be preempted, determining whether to proceed with establishment of the requested TE-LSP at the determined preemption-priority value.