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Date:      Sun, 7 Mar 2004 19:37:56 -0400 (AST)
From:      "Marc G. Fournier" <scrappy@hub.org>
To:        Tim Wilde <twilde@dyndns.org>
Cc:        freebsd-net@freebsd.org
Subject:   Re: Odd network issue ... *very* slow scp between two servers 
Message-ID:  <20040307193726.R13247@ganymede.hub.org>
In-Reply-To: <Pine.BSF.4.58.0403061733200.12479@manganese.bos.dyndns.org>
References:  <20040306150504.Q13247@ganymede.hub.org> <Pine.BSF.4.58.0403061733200.12479@manganese.bos.dyndns.org>

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On Sat, 6 Mar 2004, Tim Wilde wrote:

> On Sat, 6 Mar 2004, Marc G. Fournier wrote:
>
> > I have two servers on the same network switch, sitting one on top of the
> > other ... one is running an em (Dual-Xeon 2.4Ghz) device, the other an fxp
> > (Dual-PIII 1.3Ghz) device ...
>
> Is it a Cisco Catalyst switch?  If so, you need to switch the em's to
> autoselect, on both the server and switch end.  For some reason, the em
> driver will not properly lock down its rate when talking to a Cisco
> Catalyst switch.  At least, I had an identical problem with em's talking
> to a Catalyst 2950 and that was the fix I came up with.  Give it a try and
> see how your results go.

Note that forcing it to 100baseT half-duplex (or 10baseT/UTP half-duplex)
corrects the problem ... turns out it is only in full-duplex mode that its
hosed ...

----
Marc G. Fournier           Hub.Org Networking Services (http://www.hub.org)
Email: scrappy@hub.org           Yahoo!: yscrappy              ICQ: 7615664



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