Re: git: 5ead817c3b7a - main - rc: Teach netwait to wait for DAD

From: Dag-Erling_Smørgrav <des_at_FreeBSD.org>
Date: Sat, 04 Oct 2025 18:33:30 UTC 
"Bjoern A. Zeeb" <bz@FreeBSD.org> writes:
> Dag-Erling Smørgrav <des@FreeBSD.org> writes:
> >    rc: Teach netwait to wait for DAD
> >
> >    In some configurations, especially in jails, it is possible for the
> >    system to boot so fast that we end up launching daemons while duplicate
> >    address detection is still ongoing.  If that happens, said daemons may
> >    fail to bind to IPv6 addresses, as they are still tentative.  Teach the
> >    netwait service to wait (up to 10 seconds, by default) for the tentative
> >    flag to vanish.
> Why 10s?
>
> You should never have to wait longer than net.inet6.ip6.dad_count + 1 seconds.
>
> Also the extra variable netwait_dad_timeout really isn't necessary in that case
> if you use the sysctl.

Thanky you, please see https://reviews.freebsd.org/D52905

DES
-- 
Dag-Erling Smørgrav - des@FreeBSD.org