Patent ID: 9660860
Date: 2017-05-23
CPC Classifications: H04L

Claim:
1. A method comprising: receiving, with an ingress network device that acts as an ingress for a label switched path (LSP) traversing at least a portion of a network, a message indicating an error along the LSP; delaying an operation, with the ingress network device, performed to configure a replacement LSP to be used in place of the LSP in order to provide time during which a cause of the error along the LSP is able to be determined; determining that the cause of the error is a failure of a network device supporting operation of the LSP based on link state advertisements (LSAs) received from multiple network devices adjacent to the failed network device in accordance with an interior gateway protocol (IGP), each of the LSAs indicating a link error between a respective one of the network devices adjacent to the failed network device and the failed network device; and when the cause of the error is determined to be the failure of the network device supporting operation of the LSP, performing the operation to configure the replacement LSP with the ingress network device such that the replacement LSP avoids the failed network device.