SGE2010 - slow gigabit throughput

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May 5th, 2010
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I realize this is just a small business switch, basically a rebranded Linksys, but I'm out of ideas as to why I'm only getting 200Mbits/s

- 48 port - 10/100/1000 , set to standalone mode

- 3 separate PCs on this switch , all are fast machines with Core 2 duo / plenty of RAM etc...

- all 3 auto-sense 1Gbps connection

I use iperf tool for bandwidth testing and no matter which PC I pick as server, which as client I get about 150 to 250Mbits/s

I am not looking for full 1000 here, but 200 seems rather sad....

any ideas?

- jumbo frames seem to make no difference

- I am using TCP test in iperf , standard no extra flags , 10 seconds, 20 seconds or even 30 seconds all come out the same.

- wiring is shady as some of it is just Cat5 , but when going from one laptop on the switch to another with brand new Cat6 cables I STILL only got 200.

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paolo bevilacqua Wed, 05/05/2010 - 11:49
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Replace switch with a crossed cable between systems, and repeat the test.

Let us know the results.

pcervana0501 Wed, 02/08/2012 - 16:27
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Were you able to resolve this issue because I seem to be experiencing the same problem on the SGE 2010?

Any assistance will be greatly appreciated.


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