Amazon Elastic Compute Cloud
User Guide for Windows Instances

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Enhanced Networking on Windows

Enhanced networking uses single root I/O virtualization (SR-IOV) to provide high-performance networking capabilities on supported instance types. SR-IOV is a method of device virtualization that provides higher I/O performance and lower CPU utilization when compared to traditional virtualized network interfaces. Enhanced networking provides higher bandwidth, higher packet per second (PPS) performance, and consistently lower inter-instance latencies. There is no additional charge for using enhanced networking.

Enhanced Networking Types

Depending on your instance type, enhanced networking can be enabled using one of the following mechanisms:

Elastic Network Adapter (ENA)

The Elastic Network Adapter (ENA) supports network speeds of up to 100 Gbps for supported instance types.

C5, C5d, C5n, F1, G3, G4, H1, I3, I3en, m4.16xlarge, M5, M5a, M5ad, M5d P2, P3, R4, R5, R5a, R5ad, R5d, T3, T3a, u-6tb1.metal, u-9tb1.metal, u-12tb1.metal, X1, X1e, and z1d instances use the Elastic Network Adapter for enhanced networking.

Intel 82599 Virtual Function (VF) interface

The Intel 82599 Virtual Function interface supports network speeds of up to 10 Gbps for supported instance types.

C3, C4, D2, I2, M4 (excluding m4.16xlarge), and R3 instances use the Intel 82599 VF interface for enhanced networking.

For information about the supported network speed for each instance type, see Amazon EC2 Instance Types.

Enabling Enhanced Networking on Your Instance

If your instance type supports the Elastic Network Adapter for enhanced networking, follow the procedures in Enabling Enhanced Networking with the Elastic Network Adapter (ENA) on Windows Instances.

If your instance type supports the Intel 82599 VF interface for enhanced networking, follow the procedures in Enabling Enhanced Networking with the Intel 82599 VF Interface on Windows Instances.