From owner-freebsd-hackers@FreeBSD.ORG  Wed Jul  9 13:16:04 2003
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From: "Max Clark" <max.clark@media.net>
To: "Dan Nelson" <dnelson@allantgroup.com>
Date: Wed, 9 Jul 2003 13:20:28 -0700
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cc: freebsd-hackers@freebsd.org
Subject: RE: What ever happened with this? "eXperimental bandwidth delay
	product code"
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Assuming zero (0) network latency what should I configure on my FreeBSD
boxes to saturate a 6Mbit/s (750Kbyte/s) link?

Thanks,
Max

-----Original Message-----
From: Dan Nelson [mailto:dnelson@allantgroup.com]
Sent: Wednesday, July 09, 2003 12:41 PM
To: Max Clark
Cc: freebsd-hackers@freebsd.org
Subject: Re: What ever happened with this? "eXperimental bandwidth delay
product code"


In the last episode (Jul 09), Max Clark said:
> > 6000000/8*.220 = 165Kbytes or 1.32Mbit/s
>
> I understand the BDP concept and the calculation to then generate the
> tcp window sizes. What I don't understand is this...
>
> How in the world is a windows 2000 box running commercial software
> able to push this link to 625KByte/s (5Mbit/s)????

Perhaps it defaults to a larger window size?  You can easily verify
this with tcpdump or ethereal.

--
	Dan Nelson
	dnelson@allantgroup.com