Windows Server 2008 R2 introduced two new features for Hyper-V which are available if the hardware supports it:
- VM Chimney (TCP Offload Support)
- Virtual Machine Queue (VMQ)
VM Chimney (Offload Support) allows the TCP/IP traffic in a VM to be offloaded to a physical NIC on the host computer. This reduces the CPU burden and improves network performance.
Virtual Machine Queuing (VMQ) allows the physical NIC to create virtual network queues for each VM on the host. This allows network packets to be passed directly from the hypervisor to the VM and so reduces a lot of overhead normally associated with network traffic.
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