[Bug 287146] accept_rtadv does not work on bridged interface

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=287146

--- Comment #2 from Martin Birgmeier <d8zNeCFG@aon.at> ---
Something is still strange with em0 as part of bridge0. With high network load
I get random disconnects from other hosts. The strange thing is that these
other hosts are all directly reachable, and some would be dropped whereas
others are not (I am using remote X clients extensively).

For example, from the host with the bridge (mizar) the connection to gandalf
works, from there the connection to hal works, but the direct connection
between mizar and hal just got dropped.

On hal, "ndp mizar" gets no result.

This seems to resonate with what I wrote in
https://forums.freebsd.org/threads/mountd-does-not-respond-via-ipv6-over-a-bridge.97913/
.

There is one thing, this is not the standard em0, but
intel-em-kmod-7.7.8.1402501 aka net/intel-em-kmod. (The reason for this is bug
235031, and despite what I wrote there, I later realized that there is still a
significant performance penalty. I might try again with the native driver, but
currently I have too many open issues to juggle - bug 286869 being one of
them).

-- Martin

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