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Date:      Mon, 27 Jan 1997 20:54:07 -0800
From:      David Greenman <dg@root.com>
To:        jlrobins@zappa.cs.uncc.edu (James Robinson)
Cc:        freebsd-questions@FreeBSD.ORG
Subject:   Re: Probs w/SMC Etherpower in 100tx mode 
Message-ID:  <199701280454.UAA13821@root.com>
In-Reply-To: Your message of "Mon, 27 Jan 1997 21:00:17 EST." <9701280200.AA19595@zappa.cs.uncc.edu> 

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>[Running 2.1.6]
>
>We just upgraded our twisted pair hub to a 100Mbit switch, so
>now I'd like to take full use of the 100mb bandwidth. However, 
>I'm now getting lots of "Oerrs" reported by netstat -I when trying
>to send to another box running at 100Mbit on the same switch. When
>sending to a 10bt only box on the switch, all seems fine, and I'm
>getting xfer speeds at ~900K / sec. But when talking to another
>box running 100tx, I'm getting ~30 -> ~75K / s. 
>
>When I reverse the data flow (sending from Sparc Ultra 1 to the
>FreeBSD box), I'm getting ~3.5Mbyte / second.
>
>All of the ports on the switch are set for autoconfigure. The
>BSD box autoconfigs 100tx at probe / attach time. It only
>seems to support simplex, whereas the sparc configs full duplex.
>
>Any pointers / suggestions?

   Try configuring the switch ports for half duplex for the FreeBSD machines.
We don't currently support full duplex in any of the 100Mbps drivers (all it
is a personal priority of mine to remedy this some day).

-DG

David Greenman
Core-team/Principal Architect, The FreeBSD Project



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