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Speed test tool to test switch upgrade?

Unanswered Question
Jul 6th, 2012
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Hello,


I've added a few gigabitethernet SFP modules to switches to upgrade the trunk ports from 100mb to 1gb and wondered if there is any stress testing tools where I can get the ports to use over 100mb and also monitor that it did use more that 100mb?


At the moment I am copying large files across the switches between VLANs and it seems no quicker and I need to grab some stats.


Thanks in advance for your help.

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Leo Laohoo Fri, 07/06/2012 - 23:53
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At the moment I am copying large files across the switches between VLANs and it seems no quicker

This is going to be a very hot topic.


How sure are you that your source client and/or your destination client can handle 1 Gbps of traffic?

Karsten Iwen Fri, 07/06/2012 - 23:58
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For testing the speed Iperf is a quite common tool. If you want to monitor your bandwidth-usage over longer time you should poll the interface stats with SNMP. Free tools for that are MRTG, Zenoss, Cacti, Nagios, ...

Andy White Sat, 07/07/2012 - 12:12
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Is iperf linux or windows based, I will look into that?


Is Speedtest Mini basically a way of testing bandwidth internally instead of testing your internet speed?  If so that is brilliant!


Thanks

Andy White Sat, 07/07/2012 - 12:41
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Got speedtest mini working, my PC has a 1 gig nic and is on 3750G trunked to another 3750G where the speedtest mini server is and I only get 250mb download and upload, is this normal?

mikegrous Sat, 07/07/2012 - 13:37
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You have to remember that with this speedtest you will also have the NIC of the PC and server in the equasion. With our speedtest server i have hit the 1 gig 1 gig speeds. The 250 meg could also be some network limitation? or link utilization etc etc. iperf is a command line tool only. Unless you download jperf. It is a java version. You can try that from server to PC too.

Andy White Sun, 07/08/2012 - 03:48
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Hello,


What do you make if the different results:


I ran speedtest mini and each way is nearly 100mb (100mb network) but iperf returns completely different results:


C:\>iperf.exe -c 192.168.90.11

------------------------------------------------------------

Client connecting to 192.168.90.11, TCP port 5001

TCP window size: 8.00 KByte (default)

------------------------------------------------------------

[1884] local 192.168.38.10 port 2998 connected with 192.168.90.11 port 5001

[ ID] Interval       Transfer     Bandwidth

[1884]  0.0-10.0 sec  20.0 MBytes  16.8 Mbits/sec



C:\>


I have run the tests many times and both return the same kind of results.

erpylko Sun, 07/08/2012 - 04:41
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I don't know, I haven't used them. What do their terms of use say? I would expect they are free since they come from I2.

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