From owner-freebsd-ipfw@FreeBSD.ORG  Fri Mar 11 05:34:11 2005
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Date: Fri, 11 Mar 2005 13:34:10 +0800
From: jim song <jingmin.song@gmail.com>
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cc: Brooks Davis <brooks@one-eyed-alien.net>
Subject: Re: why my dummynet queue not work?
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Brooks,

Actually I use the freebsd box as an router. I set the tcp window in 
another two windows box running iperf (iperf -w 5M).

Before I add in the pipes, the throughputs could reach 300M, but after
I config in the two pipes(200M bandwidth, 25ms delay), the throughput
degrade to about 5M. 

BTW, is there some limitations to tcp connections passing through a 
router?

Thanks,
--Jingmin

On Thu, 10 Mar 2005 20:39:33 -0800, Brooks Davis
<brooks@one-eyed-alien.net> wrote:
> 
> Why are you using the queue parameter at all?  If you just want to
> emulate a pipe there is usually no need to do that.  Have you adjusted
> your socket buffers in addition to your max TCP window size?
> 
> -- Brooks
>