Enable and Configure Enhanced Networking for EC2 Instances
Enhanced networking provides higher bandwidth, higher packet-per-second (PPS) performance, and consistently lower inter-instance latencies.
If your packets-per-second rate appears to have reached its ceiling, you should consider moving to enhanced networking because you have likely reached the upper thresholds of the VIF driver.
Amazon EC2 instances have three different virtual network adapters that can be used.
The vif adapter is available in all instance types. It loads the xen netfront kernel module, which is suitable for low to medium network loads.
The Intel 82599 VF adapter is available in instance types C3, C4, R3, I2, M4, and D2. It loads the kernel module ixgbevf
The Elastic Network Adapter (ENA) is in available in the P2, R4, m4.16xlarge, and X1 instance types. This adapter loads the kernel module ena and supports speeds up to 20 Gbps.
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