Martine Lenders 04f6e06dd4
gnrc_ipv6_nib: only multicast probe UNREACHABLE neighbor if 6LR
Non-routing 6LNs do not have to join the solicited nodes address, so
probing for a neighbor using that address may be in vain and only
spamming the LLN with unnecessary messages. RFC 6775 basically assumes
this in section 5.2:

> There is no need to join the solicited-node multicast address, since
> nobody multicasts NSs in this type of network.
2020-09-29 10:45:12 +02:00
..
2020-04-23 21:16:57 +02:00