My pcs will randomly disconnect and reconnect

[Glutneygg]

As the title says both my pcs are on Ethernet connection to my duma r3 and it just started today where my pcs will disconnect and reconnect every 20-30 min I am on the current firmware. I thought it was my modem but that’s not the case cause I just bought a new one and it’s still doing it 

any idea what it could be ? 

[Netduma Fraser]

Have you confirmed by connecting your devices directly to the modem that the issue stops happening? Could you provide the logs when the disconnect next happens please?