You can change the size of the buffer for packet aggregation for VMkernel connections. Increase the buffer size to reduce the number of TCP acknowledgments and improve efficiency in the VMkernel.
- In the vSphere Web Client, navigate to the host.
- On the Manage tab, click Settings.
- Expand the System section and click Advanced System Settings.
- Enter a value between 1 and 65535 for the Net.TcpipDefLROMaxLength parameter to set the LRO buffer size in bytes.
By default the size of the LRO buffer is equal to 32768 bytes.