Summary: This is a small howto on adding a VLAN to your VMWare ESX environment. In this example we add VLAN 20.
Date: Around 2012
Refactor: 1 May 2025: Checked links and formatting.

VLANs are added through the host, so in your VirtualCenter select a host, click on the tab 'Configuration', and from the Hardware part select 'Networking':

To add a VLAN you first have to go into the properties of the Virtual Switch, so click on 'Properties', which will give you this window:

After clicking 'Add' you'll get this Wizard. Select 'Virtual Machine' as connection type and click next:

Give the new network a logical name, for example: 'VLAN 20' and add the VLAN ID:

When you're done with the wizard you have to do this for every host in your environment: