A physical adapter can become a bottleneck for network traffic if the adapter speed does not match application requirements. You can change the connection speed and duplex of a physical adapter to transfer data in compliance with the traffic rate.

If the physical adapter supports SR-IOV, you can enable it and configure the number of virtual functions to use for virtual machine networking.


  1. In the vSphere Client, navigate to a host.
  2. On the Configure tab, expand Networking and select Physical adapters.
    The physical network adapters of the host appear in a table that contains details for each physical network adapter.
  3. Select the physical network adapter from the list and click the Edit adapter settings icon.
  4. Select speed and duplex mode of the physical network adapter from the drop-down menu.
  5. Click OK.