An uplink adapter can become a bottleneck for network traffic if the speed of the uplink adapter is not compatible with the network traffic speed. You can change the connection speed and duplex of an uplink adapter to transfer data faster.


Browse to a host in the vSphere Web Client navigator.


Click the Manage tab, and select Networking > Physical adapters.

The physical network adapters associated with the host appear in a table that contains details for each physical network adapter.


To change the configured speed and duplex value of a physical network adapter, select the network adapter from the list and click Edit.


Select the configured speed and duplex of the physical network adapter from the drop-down menu.


Click OK.