https://datatracker.ietf.org/doc/draft-thubert-roll-unaware-leaves/
draft-thubert-roll-unaware-leaves-07 - Routing for RPL Leaves
This specification leverages 6LoWPAN ND to provide a unicast and multicast routing service in a RPL domain to 6LNs that do not participate to RPL.
draftrollunawareleavesrouting