OpenDaVINCI single host

OpenDaVINCI uses UDP multicast as a transport mechanism and thus, a valid multicast route must always be defined.

To use OpenDaVINCI for inter-application communication on a single host (without other communication partners), you must have a multicast-enabled network interface. If the computer is already connected to a network (wired or wifi), OpenDaVINCI will simply work because the default route will allow OpenDaVINCI to find the correct network interface for multicast traffic.

If however, the computer is not connected to any network, you must explicitly enable multicast traffic by adding multicast entries to your system's routing table. You can setup the loopback interface for multicast with the following commands:

sudo ifconfig lo multicast
sudo route add -net 224.0.0.0 netmask 240.0.0.0 dev lo

This must be done whenever the computer is rebooted and not connected to an external network.