Patent ID: 7814227

Claim:
A method for calculating a particular path for a traffic engineering label switched path (TE-LSP) from a head-end node in a local domain to a tail-end node of a remote domain in a computer network, the method comprising: determining a plurality of different domain routes to the tail-end node, each domain route indicating one or more other remote domains through which the TE-LSP may traverse to reach the tail-end node of the remote domain; generating a plurality of different path computation requests, each path computation request including a different domain route of the plurality of domain routes and requesting a computed path along the included domain route; sending the plurality of different path computation requests to one or more path computation elements (PCEs) of the local domain; receiving one or more path responses to the path computation request for each different domain route; selecting the particular path from the path responses; and establishing the TE-LSP along the particular path.