On Fri, Dec 5, 2008 at 1:30 PM, Dan Wilga <span dir="ltr"><<a href="mailto:mythtv-users2@dwilga-linux1.amherst.edu">mythtv-users2@dwilga-linux1.amherst.edu</a>></span> wrote:<br><div class="gmail_quote"><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
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I bought a new(ish) motherboard with an nVidia Corporation MCP51<br>
ethernet controller. This uses the forcedeth linux driver. The<br>
problem is, this motherboard chipset only supports normal (MTU=1500)<br>
frames. The result is that I only get about 330 Mbps from this port.</blockquote><div><br> </div></div>I doubt that's your problem. I don't have jumbo frames enabled and my tests show 930 Mbps using iperf and onboard gigabit. I'm reasonably sure at least one of them is forcedeth based. Could be a hardware or driver issue though.<br>
<br>Not that I don't think jumbo frames is usefull, but it seems to me that it's not everything if I can get that speed without them. I just haven't been willing to deal with compatibility issues on old hardware that's 100M only. <br>