1. A method of managing a node in a Low power and Lossy Network (LLN), the method comprising: receiving, at a node in an LLN and from a parent node in the LLN, a unicast signaling message that includes an address reconfiguration command directing the node to perform an address reconfiguration using a preferred prefix included in the body of the unicast signaling message; determining whether there is an active flow on the node; based on determining that there is the active flow on the node, activating a delay timer for the node, the delay timer representing a time period by which the node is configured to delay responding to the unicast signaling message pending a resolution of the active flow; and responding, by the node, to the address reconfiguration command at the end of the time period based on whether the resolution of the active flow occurred.