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List:       freebsd-net
Subject:    Re: tx driver
From:       Christian Kratzer <ck () cksoft ! de>
Date:       2001-12-18 19:13:17
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Hi,

On Tue, 18 Dec 2001, Petr Holub wrote:

> Hi all!
> 
> I've encountered really awful behavior of my SMC card using
> tx driver in FreeBSD 4.3. On 100 Mbps network I get the throughput
> just about 200 kBps :-( Colleagues of mine running some PC
> based routers have very similar experiences with this driver
> (in both 4.3 and 4.4 Rel's) The same card running under the
> exactely same conditions in NetBSD is working pretty good
> (11 MBps) and in Windows 2000 (8 MBps). Also running other cards
> (like those with rl drivers) on the same network gives
> very reasonable results in FreeBSD (approx. 10.5 MBps) so
> I'm pretty convinced driver is to blame. Does anybody have
> some workaround for this?

the usual problem with this kind of performance with any driver
is failed full/half duplex negotiation.  Please try manually forcing your 
card to half or full duplex 

Add one of 
	-mediaopt full-duplex
or
	-mediaopt half-duplex

depending on the setting of your switch to your ifconfig line in /etc/rc.conf

This is the single most common cause of really low ethernet performance.
I have had good experiences with the tx driver on 4.3 ond 4.4 releases.

Greetings
Christian

-- 
CK Software GmbH
Christian Kratzer,		Schwarzwaldstr. 31, 71131 Jettingen
Email:	ck@cksoft.de
Phone: 	+49 7452 889-135	Open Software Solutions, Network Security
Fax: 	+49 7452 889-136	FreeBSD spoken here!



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