> AFAICT NetBSD only does proper NWAY negotiation if media is set to au=
to.

That is also my experience, and I thought that was sort of the norm
elsewhere as well.

> So the switch needs to be hard-wired (if it can even do that) if you
> hardwire the mode on the NetBSD side.

Yep.  The following document may be of interest:

   http://www.cisco.com/warp/public/473/46.html#auto_neg_valid

It has a table of which of the combinations "settings on switch"
and "settings on NIC" result in a configuration which does not
have a duplex conflict (which is usually the reason if you are
seeing terrible performance in such setupts).

BTW, I've also seen instances of the problem noted in footnote 2
below the table, but not with NetBSD (I think).

> This is a bug, and it should be fixed.

Well, Charles says "yes", so it must be true! ;-)  (Seriously, I trust
his statement on this; I don't have that particular detailed knowledge
to tell that myself, though.)

Regards,

- H=E5vard