[openib-general] IPv6oIB neighbour discover broken when MCGs overflow

[Shirley Ma]

Roland,

>I really don't like this approach, since it can break things in very
>subtle ways (eg suppose one node fails to join its solicited node
>group, but then a later node wants to talk to it and succeeds in
>joining the solicited node group as a send-only member -- since the
>first node is not a member then it will never see the ND messages).

For the successful join, ND sends to the node directly, for the failure
join, ND sends to all hosts addr. So ND will work no matter whether the
join OK or not, that's the patch does.

Thanks
Shirley Ma
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