[riot-notifications] [RIOT] gnrc_ndp: add support for address-less link-layers (#3628)
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Tue Sep 1 23:21:54 CEST 2015
You send a neighbor solicitation (either to the IPv6 address of the node if you already know the host [from previous communiction] or to the solicited-nodes multicast address of the IPv6 address if you don't know it) with the IPv6 address of the node in it's target field. If you get a neighbor advertisement with the solicited flag set and the target address being set to the IPv6 address you tested the reachability for, you know the neighbor is reachable.
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