Date: Thu, 25 Feb 2010 04:57:15 -0800 From: Jeremy Chadwick <freebsd@jdc.parodius.com> To: Harald Schmalzbauer <h.schmalzbauer@omnilan.de> Subject: Re: RELENG_8 ignoring TCP window size? [Was: Re: Help for TCP understanding wanted, ACK-MSS-Window [Was: Re: best practice to watch TCP parms of established sockets]] Message-ID: <20100225125715.GA89451@icarus.home.lan> Resent-Message-ID: <20100225125737.GA89503@icarus.home.lan> In-Reply-To: <4B863CC5.80906@omnilan.de> References: <20100218192320.B34251CC09@ptavv.es.net> <4B7DB408.9010706@omnilan.de> <20100219095539.GD14413@asgard.cs.uoi.gr> <20100224153703.GA11729@asgard.cs.uoi.gr> <4B863CC5.80906@omnilan.de>
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On Thu, Feb 25, 2010 at 10:03:01AM +0100, Harald Schmalzbauer wrote: > Since I could only capture "bad IP length" packets with checsum > offloading enabled on the em, I guess it does also IP checksum > offloading, not only TCP. I'll have to set up a port mirroring test > bed to get the line packets. I hope I'll find the rfc1323 slowdown > and the difference between FreeBSD clients and Windows clients. But > at the moment I don't have spare equipment. Worth pointing out: the version of Windows you're testing with matters greatly. RFC1323 isn't enabled by default in some versions of Windows, and in other versions the default/min/max window sizes on Windows are set absurdly small. -- | Jeremy Chadwick jdc@parodius.com | | Parodius Networking http://www.parodius.com/ | | UNIX Systems Administrator Mountain View, CA, USA | | Making life hard for others since 1977. PGP: 4BD6C0CB |
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