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Date:      Thu, 01 Jun 2017 22:44:08 +0000
From:      bugzilla-noreply@freebsd.org
To:        freebsd-net@FreeBSD.org
Subject:   [Bug 219699] Issue with IPv6 and neighbor notification
Message-ID:  <bug-219699-2472-LsEvqh9wRv@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-219699-2472@https.bugs.freebsd.org/bugzilla/>
References:  <bug-219699-2472@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D219699

--- Comment #4 from rkoberman@gmail.com ---
(In reply to Paul G Webster from comment #3)
At the time that you collected this, everything looks good. The default rou=
te
is pointing to the correct link. (link#1) and all ndp data looks correct.

One suggestion is to accept router advertisements. To do this, add
"accept_rtadv" to you ifconfig_vtnet0_ipv6 line in rc.conf. This will cause
your system to accept router advertisements on your LAN. Unless you have
another local system configured to do IPv6 routing, this should be fine. I =
also
doubt it will help, but it might be worth a try. (If it does not help, I'd
remove it.)

You might want to monitor the default route and the NDP for
2a07:4580:b0d:27e::1 to see if they are stable. It sure sounds like somethi=
ng
is flapping when the link is inactive for some period. My guess is NDP, but
that is far from certain.

N.B. I was very active in working with IPv6 for over 15 years, but I've been
retired for six years and I'll admit that I am not as sharp on it as I once
was. Worse, Frontier, my ISP about half the year does not yet support IPv6
customer connections.

--=20
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