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Strange network bottleneck

Posted on 2008-11-01
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Last Modified: 2012-05-05
Hi:

I have an enclosure HP BLC7000, my blade servers are BL465, interconected with gigabit switches descripted as "HP GbE2c Ethernet Blade Switch for HP c-Class BladeSystem (410917-B21)", on my servers the link speed says 1Gb on the status property, but doing tests, the only i can get is 100bmps,
i´m doing tests transferring files between blades running on the same enclusure and switches, to and from the SAN so i´m sure i can get more, i also tested with ftp "get xfilename NUL" command to stress it but the results are the same, when i transfer files from my local discs to the san y get 250mbps, so the hard drives are not a bottleneck, i wonder if any of you are having similar issue, thanks in advance for any advice

At this time the gig switches are not configured so i can not get cli or other management info, but next sunday i will assign ip address to the swicthes in order to manage them, i suspect that there is some thing wrong in there.

Victor
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Question by:fizzeriano
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paulsolov earned 500 total points
ID: 22859327
check the settings on the switch for speed and duplex.  Make sure that both are ends are auto/auto or full/1gb.  If the one end has 100mb as a static settings your source will show 1GB but will only send as fast as the other side will allow
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by:fizzeriano
ID: 22859547

Thanks, tomorrow i´ll be having access to the switch, let´s see,
i´ll keep informed
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Author Comment

by:fizzeriano
ID: 22864699
Well,

actually the switch says 1000 as speed, but when i upgraded nic drivers to the last on the blades, and set them to 1000 full, the trafic between blades goes fine, with performance about 400 mbps but this is because a disk bottleneck, now, o have the 100mbps limit in my VMs on hyper-v rtm, but that´s another story...

thanks
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Author Closing Comment

by:fizzeriano
ID: 31512393
Thanks for your contribution
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