Hi Damien, Please find responses in-line.
________________________________ From: [email protected] [mailto:[email protected]] On Behalf Of Damien Roth Sent: Monday, June 04, 2012 5:03 AM To: [email protected] Subject: [6lowpan] Mesh under routing and Neighbor Discovery Hello, I continue my investigations the neighbor discovery protocol for 6LoWPAN (draft-ietf-6lowpan-nd-18), and there is one point that remains unclear to me. With 6LoWPAN, two routing mechanisms can be used : route over and mesh under. Everything is OK with the route over mechanism but I'm locked with mesh-under. In mesh-under routing, there is only two entities, the 6LBR (border router) and the hosts. Multiple hops may be needed to for hosts to reach the 6LBR. ====> In mesh under case, the assumption is that all hosts are directly IP-reachable from 6LBR. How the packets are flown from a host to the 6LBR ( using a L2-mechanism) is out of scope of the document. Currently I don't know of L2-routing protocols for mesh-under network - however, there might be some proprietary ones. My problem is in multihop configuration : how the multicast Router Solicitation messages, used by the neighbor discovery protocol, can reach the 6LBR ? Does it depends on the routing protocol used ? ====> Please check the section 10 (Examples) to get an understanding how the routers and hosts bootstrap in the multi-hop 6lowpan networks. Initial multicast RS is sent only to the local subnet and taken care by the local 6LR router in case of route-over scenario. -Samita
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