[Bug 214746] Carp ipv6 duplicate address detection

From: <bugzilla-noreply_at_freebsd.org>
Date: Tue, 25 Jul 2023 06:46:36 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=214746

Stefan Bethke <stb@lassitu.de> changed:

           What    |Removed                     |Added
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                 CC|                            |stb@lassitu.de

--- Comment #5 from Stefan Bethke <stb@lassitu.de> ---
I just ran into this myself, 12.4-stable; I have carp for ipv4, plus a custom
script that configures the v6 VIP manually. I don't think I've seen this
hehavior before, where the failover has this issue.

I'll probably adjust my script to either wait a second or two, or watch out for
the duplicate flag and simply try again.

I couldn't find much documentation on the duplicate flag. As far as I can tell,
it sticks and disables that address permanently. I would have expected that
there would be a retry mechanism of some sort.

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