10Gbe Switch Transfer Speed

My customer is using Del Force10 S4810 switch and servers connected to it also using 10Gbe network interface.
Recently they complain file transfer speed is unreasonable slow. I have try reinstall the NIC card drivers as well.

attached file is the screen shot taken from the iperf test result. based on the screen shot, the transfer speed should be correct for 10Gbe switch right?
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Yes, that looks right for a 10 Gb Ethernet connection.

What protocol are they using for the file transfer?  (Windows SMB/CIFS, FTP, SCP, TFTP, etc.?)

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Network Analysis

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