Patent ID: 7693064

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