Configure speed and duplex

You can configure the speed and duplex of the ESXi host physical network adapter using vSphere Web Client. Here is how you can do that:

1. Select your ESXi host from the inventory and select Manage > Networking:

2. Click the Physical adapters link and select the physical network adapter whose settings you would like to modify. Click on the Edit button above the list of adapters:

3. Select the new speed and duplex values: