Before you go switching hardware, try swapping cables and switch ports.<br><br>Sean<br><br><div class="gmail_quote">On Wed, Apr 7, 2010 at 12:00 AM, Adam Thompson <span dir="ltr">&lt;<a href="mailto:athompso@athompso.net">athompso@athompso.net</a>&gt;</span> wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">








<div link="blue" vlink="purple" lang="EN-CA">

<div>

<p class="MsoNormal"><span style="font-size: 9pt; font-family: &quot;Lucida Sans Typewriter&quot;; color: rgb(31, 73, 125);">Actually, I was mainly hoping to verify that it was, indeed, a
hardware problem.  One person (Trevor) reporting similar results has fairly
decent-quality GigE NICs on both sides – or at least what I *<b>assumed</b>* to
be fairly decent-quality NICs!</span></p>

<p class="MsoNormal"><span style="font-size: 9pt; font-family: &quot;Lucida Sans Typewriter&quot;; color: rgb(31, 73, 125);"> </span></p>

<p class="MsoNormal"><span style="font-size: 9pt; font-family: &quot;Lucida Sans Typewriter&quot;; color: rgb(31, 73, 125);">In your case, I’d say yes, it’s time to test different NICs. 
Obviously one of your NICs is OK – although I wouldn’t want to put much money
on which one until I tested thoroughly.</span></p>

<p class="MsoNormal"><span style="font-size: 9pt; font-family: &quot;Lucida Sans Typewriter&quot;; color: rgb(31, 73, 125);"> </span></p>

<p class="MsoNormal"><span style="font-size: 9pt; font-family: &quot;Lucida Sans Typewriter&quot;; color: rgb(31, 73, 125);">I’d also not be willing to put money on whether it’s the NIC
hardware or the software (i.e. device driver) – even though you tested under
two OSes, the Linux drivers and the Windows drivers share a lot of code for
both Intel and Realtek NICs nowadays.</span></p><div class="im">

<p class="MsoNormal"><span style="font-size: 9pt; font-family: &quot;Lucida Sans Typewriter&quot;; color: rgb(31, 73, 125);"> </span></p>

<p class="MsoNormal"><span style="font-size: 9pt; font-family: &quot;Lucida Sans Typewriter&quot;; color: rgb(31, 73, 125);">-Adam Thompson </span></p>

<p class="MsoNormal"><span style="font-size: 9pt; font-family: &quot;Lucida Sans Typewriter&quot;; color: rgb(31, 73, 125);"> &lt;<a href="mailto:athompso@athompso.net" target="_blank">athompso@athompso.net</a>&gt;</span></p>


<p class="MsoNormal"><span style="font-size: 9pt; font-family: &quot;Lucida Sans Typewriter&quot;; color: rgb(31, 73, 125);"> (204) 291-7950</span></p>

<p class="MsoNormal"><span style="font-size: 9pt; font-family: &quot;Lucida Sans Typewriter&quot;; color: rgb(31, 73, 125);"> </span></p>

</div><div style="border-width: medium medium medium 1.5pt; border-style: none none none solid; border-color: -moz-use-text-color -moz-use-text-color -moz-use-text-color blue; padding: 0in 0in 0in 4pt;">

<div>

<div style="border-width: 1pt medium medium; border-style: solid none none; border-color: rgb(181, 196, 223) -moz-use-text-color -moz-use-text-color; padding: 3pt 0in 0in;">

<p class="MsoNormal"><b><span style="font-size: 10pt;" lang="EN-US">From:</span></b><span style="font-size: 10pt;" lang="EN-US"> <a href="mailto:roundtable-bounces@muug.mb.ca" target="_blank">roundtable-bounces@muug.mb.ca</a> [mailto:<a href="mailto:roundtable-bounces@muug.mb.ca" target="_blank">roundtable-bounces@muug.mb.ca</a>]
<b>On Behalf Of </b>Kevin McGregor<br>
<b>Sent:</b> Tuesday, April 06, 2010 18:37<br>
<b>To:</b> Continuation of Round Table discussion<br>
<b>Subject:</b> Re: [RndTbl] Network performance tuning</span></p>

</div>

</div>

<div>

<div>

<div>

<p class="MsoNormal"><span style="color: rgb(31, 73, 125);">[...]</span></p><div class="im"><br>
The source hardware seems to be having a problem sending. Receiving, less so:<span style="color: rgb(31, 73, 125);"></span></div>

<p class="MsoNormal"><span style="color: rgb(31, 73, 125);">[...]</span></p><div class="im">

<p class="MsoNormal">...Although push the bandwidth (UDP) too high, and a lot of
packets get lost.<br>
<span style="color: rgb(31, 73, 125);">[...]</span><br>
Any further thoughts?<br>
<br>
</p>

</div></div>

</div>

<p class="MsoNormal"> </p>

</div>

</div>

</div>

</div>


<br>_______________________________________________<br>
Roundtable mailing list<br>
<a href="mailto:Roundtable@muug.mb.ca">Roundtable@muug.mb.ca</a><br>
<a href="http://www.muug.mb.ca/mailman/listinfo/roundtable" target="_blank">http://www.muug.mb.ca/mailman/listinfo/roundtable</a><br>
<br></blockquote></div><br><br clear="all"><br>-- <br>Sean Walberg &lt;<a href="mailto:sean@ertw.com">sean@ertw.com</a>&gt;    <a href="http://ertw.com/">http://ertw.com/</a><br>