Hi,
Im trying to get my OH system in a VM working.
On my PC everythings ok
knx:type=ROUTER
knx:localIp=192.168.1.4
when I try it on my other PC in a Linux VM i can send to KNX but Im not recieving feedback
PC IP 192.168.1.6
Virtualbox IP 192.168.1.33
tried both IPs , tried Tunnel nothing works
can you ping 192.168.1.4 from your virtual machine?
knx ROUTER Mode is multicast, I’m not sure what steps have to be done to support a multicast route to Virtualbox VM - keep in mind, that for ROUTER Mode, the multicast ip of a knx-interface defaults to 224.0.23.12
The knx TUNNEL Mode often needs both
knx:ip=ip.of.knx.gateway (this is normally a private ip such as 192.168.xxx.yyy) and
knx:localIp=ip.of.openhab.computer
but sometimes knx:localIp has to be unset.
As I’m using openHAB within a Xen-DomU for ages, there is no general Issue that prevents success 
Check the network settings of your VM. From memory, it needs to be a ‘Bridged Adapter’ to talk to your local network.
Found my problem. Routing doesnt get feedback from bus.
Tunneling is the way to go - my problem was that I had ETS running and my Router only allows one Tunnel?- or maybe I dont know how to change it.
Regardless ETS is now Router and OH as Tunnel
thx