1. A method, comprising: selecting, for a node N within a computer network that utilizes a directed acyclic graph (DAG) to route packets, a parent node P that is a parent to node N in the DAG; determining a grandparent node GP within the computer network that is a parent of the parent node P in the DAG; selecting an alternate parent node P′ within the computer network that has con-nectivity to the grandparent node GP and the node N; and establishing a sibling connection within the computer network between the parent node P and the alternate parent node P′, wherein the sibling connection provides a path for reaching prefixes reachable via the node N.