1. A method, comprising: in a low power and lossy network (LLN) comprising one or more interfaces and a plurality of nodes, preparing, by a sender node, data for transmission to a recipient node via a communication medium; determining, by the sender node, an age value for a set of current transmission parameters, the current transmission parameters stored on the sender node and associated with the recipient node; determining, by the sender node, that the age value has exceeded a threshold value; selecting, by the sender node, a data packet in which to set a transmission parameter request in response to determining that the age value has exceeded the threshold value; setting, by the sender node, the transmission parameter request in the selected data packet; communicating, by the sender node, the data packet comprising the transmission parameter request to the recipient node using a set of base transmission parameters; receiving, by the sender node, a transmission parameter response from the recipient node, the response providing updated transmission parameters for the recipient node; and updating, by the sender node, the transmission parameters associated with the recipient node based on the updated transmission parameters in the transmission parameter response.