Date: Fri, 18 Oct 2002 12:26:19 -0700 (PDT) From: Kelly Yancey <kbyanc@posi.net> To: Luigi Rizzo <rizzo@icir.org> Cc: Petri Helenius <pete@he.iki.fi>, Lars Eggert <larse@ISI.EDU>, <freebsd-net@FreeBSD.org> Subject: Re: ENOBUFS Message-ID: <20021018122321.G1611-100000@gateway.posi.net> In-Reply-To: <20021018114829.Y1611-100000@gateway.posi.net>
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On Fri, 18 Oct 2002, Kelly Yancey wrote:
> > You should definitely clarify how fast the smartbits unit is pushing
> > out traffic, and whether its speed depends on the measured RTT.
> >
>
> It doesn't sound like the box is that smart. As it was explained to me, the
> test setup includes a desired 'load' to put on the wire: it is measured as a
> percentage of the wire speed. Since our SmartBit unit only supports
> 100base-T and doesn't understand vlans, we have to use 7 separate outbound
> ports, each configured for 14.25% load. To the GigE interface, this should
> appear as 99.75 megabits of data (including all headers/framing).
>
Oops. That was actually the explanation of the SmartBits 'desired ILoad'
which I didn't quote in the posted numbers. The actual number of packets
transmitted is based on RTT. Sorry for the confusion,
Kelly
--
Kelly Yancey -- kbyanc@{posi.net,FreeBSD.org}
"No nation is permitted to live in ignorance with impunity."
-- Thomas Jefferson, 1821.
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