Slow Network Transfer Speeds on UCS Blade

[Luis Sanchez]

I have a UCS Blade Chasis with 8 Blades.

Running iPerf to test transfer speeds between 2 Linux machines and I have speeds upwards of 500 MB/s

When running iPerf from Windows to Windows ....... or...... Windows to Linux...... my speeds are 20 MB/s

We have checked to make sure there was nothing funky with the vNIC polices.  These 2 Blades Pinned to the same Fabric Interconnect as well.

Any thoughts?    

Active TAC case number 622701659

[ebailey1367]

We had a similar issue and the issue was the LRO settings in esxi

http://billyc5022.blogspot.com/2011/09/vmware-esxi-41-optimizations-for-cisco.html

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