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Date: Mon, 19 Jan 1998 14:19:40 -0800 (PST)
From: Chris Caputo <ccaputo@alt.net>
To: freebsd-stable@FreeBSD.ORG
Subject: Re: network performance problems (de0) (resend) 
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I ended up swapping in a 21140 based card (DE500-XA) to replace the 21143
(DE500-BA) based one and the problem went away.

The conclusion based on this is that the 21143 driver may not be working
well for Full-Duplex 100BaseTX applications. 

Some people asked about the switch.  The switch is a Cisco Catalyst 2901. 

Chris

On Thu, 15 Jan 1998, Chris Caputo wrote:
> On Thu, 15 Jan 1998, David Greenman wrote:
> >    Nonetheless, the 'de' driver has historically been broken for full
> > duplex operation and Tom's suggestion is right on the money. I'd try
> > setting the device or the switch or both to half duplex to see if the
> > problem goes away. 
> 
> Respectfully, I wonder if this is because people didn't know the link
> settings necessary to activate it on 2.1-STABLE.  On 2.1 we are using
> 
> ifconfig_de0="inet x.x.x.x link0 link1 link2 netmask x.x.x.x"
> 
> in /etc/sysconfig and it is working like a charm.  The switch reports no
> corrupt packets and netstat reports no collisions (implying nominal full
> duplex operation). 
> 
> I'll keep messing around with 2.2-STABLE and report anything that might be
> useful.
> 
> Thanks,
> Chris
>