The virtual machines in a vApp can connect to vApp networks (isolated or routed) and organization virtual datacenter networks (direct or fenced). You can add networks of different types to a vApp to address multiple networking scenarios.
Select the Networking tab in a vApp and select the Show networking details check box to view a list of the networks that are available to the vApp. Virtual machines in the vApp can connect to these networks. If you want to connect a virtual machine to a different network, you must first add it to the vApp.
A vApp can include vApp networks and organization virtual datacenter networks. A vApp network can be isolated by selecting None in the Connection drop-down menu. An isolated vApp network is totally contained within the vApp. You can also route a vApp network to an organization virtual datacenter network to provide connectivity to virtual machines outside of the vApp. For routed vApp networks, you can configure network services, such as a firewall and static routing.
You can connect a vApp directly to an organization virtual datacenter network. If you have multiple vApps that contain identical virtual machines connected to the same organization virtual datacenter network and you want to start the vApps at the same time, you can fence the vApp. This allows you to power on the virtual machines without conflict, by isolating their MAC and IP addresses.