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Date:      Thu, 26 Dec 2002 23:06:35 +0100
From:      Wilko Bulte <wkb@freebie.xs4all.nl>
To:        Jameel Akari <jakari@bithose.com>
Cc:        Trevor Johnson <trevor@jpj.net>, alpha@FreeBSD.ORG
Subject:   Re: 5.0-RC2 on Alphaserver 4100 mostly a success
Message-ID:  <20021226230635.A42090@freebie.xs4all.nl>
In-Reply-To: <Pine.OSF.4.33.0212261656510.28837-100000@poptart.bithose.com>; from jakari@bithose.com on Thu, Dec 26, 2002 at 05:04:31PM -0500
References:  <20021226162035.I19983-100000@blues.jpj.net> <Pine.OSF.4.33.0212261656510.28837-100000@poptart.bithose.com>

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On Thu, Dec 26, 2002 at 05:04:31PM -0500, Jameel Akari wrote:
> 
> On Thu, 26 Dec 2002, Trevor Johnson wrote:
> 
> > from another computer on the same Fast Ethernet hub.  The one problem I
> > noticed is that the files transferred slowly by FTP, at less than 10
> 
> > ewa0.0.0.2.1       00-00-F8-00-3C-EC    FastFD (Full Duplex)
> 
> 	If you are indeed using a hub, then having the NIC set to
> full-duplex is bound to cause problems.  You'll have to set ewa_mode in
> SRM, I think, to use 100/half or autosense.  Otherwise the transceiver on
> the NIC and/or the hub keep flipping back and forth, and things just suck.
> 
> > de0: <Digital 21140 Fast Ethernet> port 0x1ffef00-0x1ffef7f mem 0x7efff00-0x7efff7f irq 8 at device 2.0 on pci0
> > de0: interrupting at IRQ 0x0 intA (vec 0xb80)
> > de0: DEC DE500-XA 21140 [10-100Mb/s] pass 1.1
> > de0: address 00:00:f8:00:3c:ec
> > de0: enabling Full Duplex 100baseTX port
> 
> 	I think some DE500s have problems going at 100/full even on a
> proper 100Mbit switch.. the one in my PWS500au (miata) crawls as 50-100kB/sec
> when everything is forced to 100/full.  Much happier at 100/half, so I set
> the ewa_mode and the switch port speeds to match.  I think this is fixed
> in later revisions of the DE500.

IIRC the various chip revs used on DE500 are not all working too well
with FDX. 

-- 
|   / o / /_  _   		wilko@FreeBSD.org
|/|/ / / /(  (_)  Bulte				

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