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Date:      Fri, 11 Mar 2005 13:34:10 +0800
From:      jim song <jingmin.song@gmail.com>
To:        freebsd-ipfw@freebsd.org
Cc:        Brooks Davis <brooks@one-eyed-alien.net>
Subject:   Re: why my dummynet queue not work?
Message-ID:  <d018391a050310213469df3025@mail.gmail.com>
In-Reply-To: <20050311043933.GA28686@odin.ac.hmc.edu>
References:  <d018391a050310200327a01c48@mail.gmail.com> <20050311043933.GA28686@odin.ac.hmc.edu>

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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
>



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