[Bug 296656] IPv6 ND SIOCSIFINFO_IN6 cannot raise stale nd_linkmtu above already-clamped in6_ifmtu()

From: <bugzilla-noreply_at_freebsd.org>
Date: Mon, 27 Jul 2026 09:33:06 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=296656

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

           What    |Removed                     |Added
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                 CC|                            |ae@FreeBSD.org

--- Comment #1 from Andrey V. Elsukov <ae@FreeBSD.org> ---
I assume you did copy handling from nd6_ra_opt_mtu(). This looks reasonable,
but I think you need add some handling to nd6_setmtu() too. Thus changing MTU
via ifconfig will also modify linkmtu.

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