I've configured my Netgear R7800 router with DD-WRT firmware to connect with Sky Fibre via the Haewei HG612 modem, and it all seems to work ok.

The DHCP lease renews every hour, but every 24 hours it counts down to zero and disconnects.

I then need to reconnect manually with the udhchp command

Are there any know settings in DD-WRT that need to be applied to keep the connection live?

I generally have a simple setup (no VPN, IPv6 etc) and haven't changed any settings from factory reset

Much appreciated