I have a new two Intel Server ( SC5600BRP, S5520HCT, E5645, 4xSAS RS2BL040 RAID 10, 2008 R2 x64 SP1).
When you install Hyper-V network performance drops by about 40 - 50%
Check errata #32 of the Specification update (PDF).
Thanks but it did not help.
Two serwers with 24GB RAM
cpu E5645 - network bandwitch 55MB/s
cpu E5606 - network bandwitch 95MB/s
no Hyper-V - network bandwitch 120MB/s
Do you have the latest NIC driver installed?
yes and all defaults
all system updates installed
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