From: Peter Hessler <phessler@theapt.org>
Subject: Re: IPv4 route with IPv6 gateway
To: "Nitsche, Elia" <elia.nitsche@tuwien.ac.at>
Cc: Claudio Jeker <cjeker@diehard.n-r-g.com>, Denis Fondras <openbsd@ledeuns.net>, "tech@openbsd.org" <tech@openbsd.org>
Date: Wed, 22 Jul 2026 12:27:19 +0200

On 2026 Jul 22 (Wed) at 09:34:48 +0000 (+0000), Nitsche, Elia wrote:
:> Is the caching done in nd6 and arp smart enough to pull the packet out
:> correctly? That is something to check.
:I did not run into issues, but I also did not test it explicitly. Is there
:an 'easy' way to invalidate the nd6/arp cache?
:
:elia
:

# arp -dan
# ndp -cn

That will flush all entries for either arp or neighbor discovery (ndp).
You can specify a specific hostname if you want, check the man page for
syntax.


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