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Date:      Sat, 15 Dec 2001 03:13:04 -0600
From:      Alfred Perlstein <bright@mu.org>
To:        David Greenman <dg@root.com>
Cc:        Terry Lambert <tlambert2@mindspring.com>, Brooks Davis <brooks@one-eyed-alien.net>, rsharpe@ns.aus.com, freebsd-hackers@FreeBSD.ORG
Subject:   Re: Does anyone know if the Broadcom BCM5700 has problems with HW csum?
Message-ID:  <20011215031304.N79896@elvis.mu.org>
In-Reply-To: <20011215005739.A84861@nexus.root.com>; from dg@root.com on Sat, Dec 15, 2001 at 12:57:39AM -0800
References:  <3C1AEA9E.6010502@ns.aus.com> <20011214214118.A30560@Odin.AC.HMC.Edu> <3C1AF362.534BD2F7@mindspring.com> <20011215005739.A84861@nexus.root.com>

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* David Greenman <dg@root.com> [011215 03:12] wrote:
> >Brooks Davis wrote:
> >> There was a commit to current a few hours ago disabling hardware
> >> checksums on recieve due to corruption problems.  It will be MFC'd in
> >> three days though it's a two line fix so you could apply it your self:
> >> 
> >> http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/dev/bge/if_bge.c.diff?r1=1.4&r2=1.5
> >
> >I believe you will find that the problem is related to the firmware
> >handling of VLAN tagging, and that the problem only exists if VLAN
> >tagging is enabled.
> 
>    You would believe wrongly, then, because the problem that I was seeing did
> not involve VLAN tags.

You're probably incorrect, it doesn't matter if vlan tags are active
or not, it's most likely wheather or not the firmware is being asked
to handle them at all.

-- 
-Alfred Perlstein [alfred@freebsd.org]
'Instead of asking why a piece of software is using "1970s technology,"
 start asking why software is ignoring 30 years of accumulated wisdom.'
                           http://www.morons.org/rants/gpl-harmful.php3

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