I have two routers, one that also acts as a modem (coax cable,ISP provided,primary router, 192.168.0.1) and one (secondary router,192.168.1.1) that has a USB port to run an SMB service. My problem is that despite reading through a lot of useful answers here and trying this for hours now, my machine connected to the router 192.168.0.1 is unable to ping 192.168.1.1 and thus is unable to access SMB. I read in one of the answers here that I should set up the primary router (192.168.0.1) with a subnet mask 255.255.0.0 and disable NAT forwarding in the secondary router. However, there is no subnet setting in this ISP provided router/modem.
Routers and the client PC are connected through UTP cables.
Can somebody help me please? I have created a basic diagram of the setup: