When first deploying a VLM, each VLM has two interfaces, eth0 and eth1. To add more interfaces on your VLM, extra Network Interface Cards need to be added to your VLM Machine. Creating and adding NIC's step by step process depends on which platform you are using, either VMware, Hyper-V etc.
The general method of adding extra NIC's is:
When the VLM Machine powers up, your VLM will have extra interfaces on the WUI