[Bug 233535] Machines lost ping6 after adding same IPv6 address

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Fri Dec 7 13:09:39 UTC 2018


https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=233535

Andrey V. Elsukov <ae at FreeBSD.org> changed:

           What    |Removed                     |Added
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                 CC|                            |mmacy at FreeBSD.org

--- Comment #8 from Andrey V. Elsukov <ae at FreeBSD.org> ---
(In reply to Slava Shwartsman from comment #7)
> Any updates?

Sorry for long delay, I just tried your test scenario. And I'm able to
reproduce the problem. From a first look, it seems there is some race in
multicast/MLD code. I see that the host, that doesn't respond to ND6 NS, for
each NS packet increments the `ip6s_notmember` counter of ip6 statistics in
icmp6_input(). And ND6 code doesn't have a chance to send a reply.

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