Patent ID: 9065750
Filing Date: 2015-06-23
Classification: H04L

Abstract:
1. A method, comprising: detecting, at a point of local repair (PLR), activation of use of a backup tunnel for a primary tunnel in a computer network; determining at the PLR whether a level of congestion of a path of the backup tunnel is greater than a threshold, wherein the threshold is when the path of the backup tunnel would be considered overloaded due to link utilization; sending a congestion notification to a stateful path computation element (PCE) to cause the PCE to start pre-computing a rerouted primary tunnel; in response to the PLR determining that the level is greater than the threshold, sending a reroute notification to a head-end node of the primary tunnel to reroute the primary tunnel, wherein the head-end node is a PCE client that communicates with the PCE; and in response to the PLR determining that the level is not greater than the threshold, allowing the backup tunnel to remain activated without sending the reroute notification to reroute the primary tunnel to the head end node.