This can be achieved by involving the IP/TP coupler (D19).
Concept
KNX Virtual links the (physical) network interface (NIC) of the computer to an IP multicast address of choice, which can be set via the parameter dialog of the IP/TP coupler (D19) in ETS. The default IP multicast address is set to 224.0.23.12.
This means that any KNXnet/IP Router connected to the same IP network and linked to the same IP multicast address, can (principally) be accessed by KNX Virtual and vice versa.
About support
There are however some constraints and circumstances that need to be taken into account in this context:
- any installed access and/or security policy of the provided IP network: firewalls, VPN, etc.
- any setting of the involved (physical) KNXnet/IP router(s)
KNX Association can therefore not accept support requests regarding this specific feature.