United Kingdom.
ISP: Now TV
Two router setup:
A) Now TV Hub Two (also known as Sky NR801)
B) Netgear Orbi Router (RBR50) and satellite (RBS50)
Router A acts as the modem to the ISP. Router B is connected to router A through router B’s WAN port. All devices, including the Roon Core are connected to router B.
Router A cannot be changed to a bridge device through its software interface.
Router B is in “Router” mode rather then “AP” mode (ie not configured as a bridge). I don’t want to change B’s mode because I would lose some functionality that I am currently using.
Roon ARC would not connect until I added a port forward for port 55000 on router A pointing to router B. Router B has UPnP enabled and handled the subsequent port forward to the Roon Core itself.
Roon ARC now works.