I followed the instructions in the link (https://aximmetry.com/learn/virtual-production-workflow/tracking/setting-up-specific-tracking-systems/setting-up-free-d-systems/) to complete the Free-D setup with VIVE MARS. Camera tracking works well on the controller PC. However, on the render PC, the frustum does not move (i.e., the frustum does not move on the LED wall).

I understand that I need to use the "Join Multicast Group" feature, but I'm not sure how to use it. I have tried googling and running code to join the multicast group with network settings for sender and receiver, but tracking still does not work on the render PC.

Currently, the VIVE Mars is connected to the controller PC. The instructions mention connecting VIVE Mars to the router, but since I don’t have a router, I am not using one. But previously, I set up a multi-machine environment through Unreal Engine(no aximmetry), and tracking through UDP messaging worked fine, so I don't think the router is the issue. I only have a switching hub and all PCs are connected to it.