Patent ID: 7924722

Claim:
A method in a network node, the method including: receiving, via a first link of the network node, a first set of path performance metrics that identifies aggregate metrics for a corresponding path to a prescribed destination via the first link, the path performance metrics based on at least initial link metrics having been output by the prescribed destination onto a corresponding source-connecting link of the prescribed destination, the initial link metrics describing performance of the corresponding source-connecting link of the prescribed destination; selectively determining second metrics for at least a second source-connecting link providing reachability by the network node to the prescribed destination for at least one connected network node; and outputting, onto the second source-connecting link, an updated set of path performance metrics based on the first set of path performance metrics and the second metrics, the updated set of path performance metrics identifying the aggregate metrics for the corresponding path to the prescribed destination via the second source-connecting link and the first link; wherein the prescribed destination is identified by the network node as a directed acyclic graph (DAG) destination and the first link is selected by the network node as a destination-oriented link that is directed toward the DAG destination.