The virtual machines in a vApp can connect to vApp networks (isolated or routed) and organization virtual data center networks (direct or fenced). You can add networks of different types to a vApp to address multiple networking scenarios.
Virtual machines in the vApp can connect to the networks that are available in a vApp. 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 data center networks. A vApp network can be isolated or routed. An isolated vApp network is contained within the vApp. You can also route a vApp network to an organization virtual data center 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 data center network. If you have multiple vApps that contain identical virtual machines connected to the same organization virtual data center network and you want to start the vApps at the same time, you can fence the vApp. Fencing the vApp allows you to power on the virtual machines without conflict, by isolating their MAC and IP addresses.
The networks that you add to the vApp use the network pool that is associated with the organization virtual data center in which you created the vApp.