Speed test tool to test switch upgrade?

[Andy White]

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.

[Leo Laohoo]

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]

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, ...

[mikegrous]

iperf is great. What also is cool is if you deploy a speedtest server in your enviroment. I find it very handy.

http://www.speedtest.net/mini.php

[Andy White]

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]

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]

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]

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]

I have customers that use some of the I2 tools for their network.

http://www.internet2.edu/performance/

-Eric

[Andy White]

So many on there are they free?

[erpylko]

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.