Tunnel reoptimization

Tunnel reoptimization allows you to manually or dynamically trigger the ingress node to recalculate a path. If the ingress node recalculates a better path, it creates a new CRLSP, switches traffic from the old CRLSP to the new, and then deletes the old CRLSP.

MPLS TE uses the tunnel reoptimization feature to implement dynamic CRLSP optimization. For example, if a link on the optimal path does not have enough reservable bandwidth, MPLS TE sets up the tunnel on another path. When the link has enough bandwidth, the tunnel optimization feature can switch the MPLS TE tunnel to the optimal path.