Yep, there is a lot of information that I didn’t include. Dante can be really simple but it can be very complex as well. I have been building my Dante rig for three years, pretty constantly, and I learned something new as recently as yesterday.
A Dante network can be as simple as two devices creating their own IPs or a huge network with multiple VLANs, both static and dynamic IPs (Audinate’s recommendation of DHCP to serve IPs is for the simplest networks only, and it’s fine advice as far as it goes), IGMP snooping, multicast flows, etc, etc.
I think that the OP just doesn’t know enough about network protocols and should start with the Audinate Level 1 training, or find someone locally that has network experience to help out.
My advice was about what I saw as the first and most obvious problem. Steffen added a few more ideas but not anywhere near “complete to give advice”.
D.