I have seen many posts similar to my situation but no "fixes" have worked. I have a Windows Server 2012 Standard Edition machine on Dell PowerEdge C6100 hardware [Intel NIC's] with Hyper-V installed. I have a Windows Server 2008 R2 Standard Edition VM running. The throughput when copying from another server is about 2.5Mbps which of course is VERY slow! I've tried disabling VMQ, enabling JumboPacket and disabling Large Send Offload as some other posts have suggested but none of this gives any better performance. When copying data across the same network to servers NOT running Hyper-V there are no issues and the speeds are about 1Gbps.
What is the issue with the Virtual Switch that is slowing everything down? I've read that the Broadcom adapters have had issues but these are Intel adapters. Please let me know if you have any suggestions.