Where to create a VLAN and connect servers?

VLAN:

Sign in to the user interface.
Select "VPS> Networks" in the left menu.
Enter the name of your new VLAN and save it.
For your VPS (see the list of virtual servers on the "Dashboard" or in the "VPS" menu), click the "Detail" button.
Click on the "Server admin> Network> Virtual network" tab.
And click the radio button to specify all the virtual networks in which the selected VPS should be a member.

Neither the number of virtual networks nor the number of members in the network is limited. If you need to check which specific VPSs are already connected to your VLAN, go back via the left menu "VPS> Networks".