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Receive Side Scaling
Receive Side Scaling (RSS) is a technique the Network Interface Card (NIC) employs to ensure that data processing for a particular connection is balanced across multiple CPU cores. Without RSS, all connections would be handled by a single CPU core, which can adversely affect network performance.
When using VMware Compatibility Guide, it is important to check the Network Interface Card supports VXLAN Offload and RSS; this will ensure that ESXi is able to leverage native hardware offloading for increased performance. This is only required if you are using VXLAN in your NSX deployment.