[Bug 286322] IPv6 doesn't work across different FIBs (epair)

From: <bugzilla-noreply_at_freebsd.org>
Date: Sat, 31 May 2025 00:38:37 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=286322

--- Comment #10 from Paige Thompson <paige@paige.bio> ---
TLDR I think I just figured out I can replicate this "working behavior if I
create the route manually I just have to specify lo0 as the interface: 

route add -inet6 -host  2001:470:b56f::2 -iface lo0 -fib 48

If that's all it is I'm ok with adding this manually as long as it will work I
don't really care, I feel like this is perhaps an unnecessary step and this
must have something to do with ndp (because IPv4 works fine when you do this
and the routes are the same after creation / assignment) 

➜  sq ndp -i epair9b
linkmtu=0, maxmtu=1500, curhlim=64, basereachable=30s0ms, reachable=15s,
retrans=1s0ms
Flags: nud auto_linklocal

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