Patent ID: 8817605

Claim:
A method for reconfiguring a pre-computed multiprotocol label switch fast reroute backup path of a working second network link from a head-end node to a second node, the method comprising: by a processor, after occurrence of a failure of a first network link, determining that the pre-computed multiprotocol label switch fast reroute backup path of the working second network link includes a link contained in a backup path of the failed first network link; by the processor, in response to determining that the pre-computed multiprotocol label switch fast reroute backup path of the working second network link includes a link contained in the backup path of the failed first network link, replacing the pre-computed multiprotocol label switch fast reroute backup path of the working second network link with a new path from the head-end node to the second node, the new path calculated to exclude the failed first network link, the working second network link, and the backup path of the failed first network link.