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Date:      Thu, 13 Dec 2001 20:21:06 -0800
From:      David Greenman <dg@root.com>
To:        Dimitry Andric <dim@xs4all.nl>
Cc:        Sergey Matveychuk <sem@ciam.ru>, Jonathan Lemon <jlemon@flugsvamp.com>, freebsd-stable@FreeBSD.ORG
Subject:   Re: fxp half-duplex problemm
Message-ID:  <20011213202106.B78956@nexus.root.com>
In-Reply-To: <18354777165.20011214052224@xs4all.nl>; from dim@xs4all.nl on Fri, Dec 14, 2001 at 05:22:24AM %2B0100
References:  <local.mail.freebsd-stable/5.1.0.14.0.20011210162739.01c08a50@marble.sentex.ca> <200112122035.fBCKZBJ62726@prism.flugsvamp.com> <002901c183c9$659763d0$0a2da8c0@sem> <20011213102230.A75383@nexus.root.com> <16453339468.20011214045827@xs4all.nl> <20011213200046.A78956@nexus.root.com> <18354777165.20011214052224@xs4all.nl>

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>Well, in the case of fxp(4), the man page is quite clear:
>
>     The fxp driver supports the following media options:
>
>     full-duplex           Set full duplex operation
>
>(end of list)
>
>It doesn't really make sense to have separate options for half and
>full duplex, because they are mutually exclusive anyway. So one of
>them was dropped. I'm not sure, but it seems to be the case with all
>NIC drivers using the common miibus code.

   I agree that the two options are mutually exclusive, but I don't agree
that it doesn't make sense to have both. It's not clear if there is a default
or what it defaults to or when such a default is relevant. There needs to
be a "half-duplex" option to make this explicitly clear in the configuration.

-DG

David Greenman
Co-founder, The FreeBSD Project - http://www.freebsd.org
President, TeraSolutions, Inc. - http://www.terasolutions.com
Pave the road of life with opportunities.

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