Patent ID: 8139479
Filing Date: 2012-03-20
Classification: H04L

Abstract:
1. A method performed by a device, the method comprising: establishing performance-based Bidirectional Forwarding Detection (BFD) sessions for each link of a primary traffic engineering Label Switched Path (TE-LSP); establishing performance-based BFD sessions for each link of a secondary TE-LSP; establishing a function-based BFD session for the primary TE-LSP; monitoring performance of the primary TE-LSP based on the performance-based BFD sessions for each link of the primary TE-LSP; monitoring performance of the secondary TE-LSP based on the performance-based BFD sessions for each link of the secondary TE-LSP; determining at least one of a degraded performance of the primary TE-LSP based on the monitoring of the performance of the primary TE-LSP or a failure of the primary TE-LSP based on the function-based BFD session for the primary TE-LSP; and automatically switching a flow of data unit traffic from the primary TE-LSP to the secondary TE-LSP when at least one of the performance of the primary TE-LSP is degraded or the failure of the primary TE-LSP occurs, where