I don't have a specific answer for you either. <br><br>A tool that I know is good at generating traffic is:<br><br><a href="http://iperf.sourceforge.net/">http://iperf.sourceforge.net/</a><br><br><br>Brad<br><br><div class="gmail_quote">
On Wed, May 5, 2010 at 7:47 PM, unsolicited <span dir="ltr"><<a href="mailto:unsolicited@swiz.ca">unsolicited@swiz.ca</a>></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;">
<br>
<br>
Paul Nijjar wrote, On 05/05/2010 6:06 PM:<div class="im"><br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
This is on topic, sort of. <br>
We have a bunch of older network switches. I worry that some might be<br>
flaky. I would like to stress-test them, preferably with FLOSS tools. <br>
My idea is to take a couple of laptops, put iPerf or netpipe on them,<br>
and blast traffic between the laptops on each port of the switches. <br>
Is there a better way? Are there better software tools I should be<br>
looking at?<br>
</blockquote>
<br></div>
I'll assume, given your message, that these are not smart switches wherein the switch itself can give you stats.<br>
<br>
And I don't suppose you have any hardware test equipment to hand. Stuff that does more than connectivity / crossover / pair testing, not being cheap.<br>
<br>
Real life tends to be the best stress test. Especially if you are sensitive to the possibility of a flaky switch, you'll be more inclined to switch ports faster should an issue develop. (You're ready for the shoe to drop, if it should.) It can also be more user irritating - less so if they're advised you're testing / there could be potential problems.<br>
<br>
I suppose it depends upon whether you suspect the switch backbone, or particular ports. If you suspect the backbone, you would need to simultaneously nail multiple ports (and have corresponding destinations of the test data). Switch fabrics / backbones being significantly faster than any one port, usually.<br>
<br>
And it probably depends upon to what use you would like to put the switches. e.g. If you're going to use a single switch in an one-off / by itself, or give it away, that's one thing, where you really want to be sure it's all happy before pawning off a potential problem to someone else.<br>
<br>
OTOH, if you'd like to make use of them in your switch stack, then putting two on top of your stack, and using real life testing (being sensitive and ready to swap ports at the first sign of trouble), may not be unreasonable. If it turns out the whole switch is flaky, you have the second in place for testing anyways.<br>
<br>
If the issue might be heat, then location may be the only restriction to use. (Ceiling / hot room, vs. under your desk as a temporary test switch.)<br>
<br>
Sorry I don't have a more specific answer for you, but I suppose some of the answer depends upon your success, or good enough, criteria.<br>
<br>
Also, be sensitive to the idea that some older switches don't really auto-negotiate all that well all the time - particularly GB adapters to MB ports. Depending upon the equipment attached to a particular port, a printer running at 10 Mbps half duplex, may be sufficient, for example.<br>
<br>
By any chance does the switch manufacturer, like a hard drive manufacturer, have any test utilities you could take advantage of?<div><div></div><div class="h5"><br>
<br>
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