Have you tried a factory reset on the router and let it auto-config as far as IP on the router?
Did you change the wan ip or the internal IP on the router? I would leave the MTU alone until you get a stable connection. Let it auto-config.
If you connect the pc directly to the modem is your connection stable?
Hi, thanks for answering, yes IP was changed to 192.168.2.1
Did a hard reset on the router first
connection is stable and continuous when connected directly to modem