Roon can't detect my Trinnov which is on the LAN

I’ve rebooted the iMac, the Trinnov, the Comcast router and reloaded the Roon software. Roon knows that the iMac is the core but it can’t find the Trinnov which is connected via Ethernet. I’d like to output the music via ethernet to the Trinnov. the kicker is that it used to work. I haven’t listened to Roon for a while and now it’s crickets. I’ve tried searching these threads but nothing really applies.
Thanks in advance.


Fellow user. On some devices, you need to enable Roon, have you check the settings to see if it might have gotten turn off. Also, you might verify that the Roon Core and the Trinnov are on the same network sub-net via their IP numbers, first 3 groups should be identical. i.,e.

As you suggested, the issue was the network. Amazingly, I was able to figure it out.