You can change the size of the buffer for packet aggregation for virtual machine connections through VMXNET 3 network adapters. Increase the buffer size to reduce the number of TCP acknowledgments and improve efficiency in workloads.


  1. In the vSphere Client, navigate to the host.
  2. On the Configure tab, expand System.
  3. Click Advanced System Settings.
  4. Enter a value between 1 and 65535 for the Net.VmxnetLROMaxLength parameter to set the LRO buffer size in bytes.
    By default the size of the LRO buffer is equal to 32000 bytes.