From owner-freebsd-net Mon Jul 30 14:21: 6 2001 Delivered-To: freebsd-net@freebsd.org Received: from net-ninja.com (cc213180-a.plymr1.tn.home.com [65.8.203.28]) by hub.freebsd.org (Postfix) with ESMTP id 0C76C37B401 for ; Mon, 30 Jul 2001 14:21:04 -0700 (PDT) (envelope-from mwade@st3.com) Received: by net-ninja.com (Postfix, from userid 1000) id CE7A16E8D0; Mon, 30 Jul 2001 17:20:21 -0400 (EDT) Received: from localhost (localhost [127.0.0.1]) by net-ninja.com (Postfix) with ESMTP id BD812176020 for ; Mon, 30 Jul 2001 17:20:21 -0400 (EDT) Date: Mon, 30 Jul 2001 17:20:21 -0400 (EDT) From: Mike Wade X-Sender: mwade@fxp0.net-ninja.com To: freebsd-net@FreeBSD.ORG Subject: FreeBSD 4.3 -> Windows 2000 Network Performance Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-net@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org I'm serving several Windows 2000 clients from several FreeBSD 4.3 servers and I'm running into a performance bottleneck somewhere which appears to be on the Windows 2000 side of things. Performance w/ FreeBSD -> FreeBSD is great! Hardware: * Intel 2x1 Ghz CPUs * 1 gig of RAM * Extreme Summit 1i w/ Copper and SX Interfaces Performance w/ ttcp (for UNIX + Win32): FreeBSD 4.3 + Netgear 622T -> FreeBSD 4.3 + Netgear 622T = 875 Mbps FreeBSD 4.3 + Netgear 622T -> Windows 2000 + Netgear 622T = 350 Mbps FreeBSD 4.3 + Netgear 622T -> Windows 2000 + 3Com 3c985-SX = 350 Mbps I've tried running multiple instances (overlapping) of ttcp w/ no performance increases (ie: each instance halfs thruput) and I've tried tweaking the following on FreeBSD with no results: sysctl -w net.inet.tcp.delayed_ack=0 sysctl -w net.inet.tcp.sendspace=65535 sysctl -w net.inet.tcp.recvspace=65535 Does anyone have any opinions on how to tweak the performance on either end? Thanks in advance! --- Mike Wade (mwade@st3.com) Network Engineer To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message