Date: Sun, 28 Nov 2004 19:26:17 -0500 From: Chuck Swiger <cswiger@mac.com> To: Andrew Seguin <asegu@borgtech.ca> Cc: freebsd-net@freebsd.org Subject: Re: FreeBSD 5.3 Networking performance problem Message-ID: <41AA6CA9.6020008@mac.com> In-Reply-To: <007f01c4d3b2$12597af0$cad435a1@mojlaptop> References: <007f01c4d3b2$12597af0$cad435a1@mojlaptop>
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Andrew Seguin wrote: > We have about 100 computers active, generating a stream of approximately > 80-90K packets per minute for a load I estimate* to be a little under > 10Mbps. Overall the firewall will need to filter for a /24 subnet. OK. > *Configuration: > Hardware: > The firewall is a Celeron 900Mhz with 128MB ram (more on the way) with one > rl and one sis based network cards. My first suggestion would be to bin the rl NIC and replace it with an fxp or dc-based NIC. Realtek NICs are infamous for working poorly or not working reliably at all under load. [ ... ] > I then tested with the whole school going through the firewall: very bad. > packets were being droped and ping times were around 600ms. Internet was > pretty much unuseable. This report sounds consistent, although you could also have a bad cable or switch port, too. It would be useful to you to look into the output of "netstat -i" and "netstat -s", and any statistics which might be available on your switches (if they have management & per-port stats). -- -Chuck
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