I own two distinct brand modems.
I own two distinct brand modems.
You have a Century Link DSL modem and an Xfinity coaxial modem, and you're connecting the DSL modem to your Xfinity setup. To link the DSL modem with your Xfinity modem, you'll need to set up a connection between them using either a coaxial cable or an Ethernet cable, depending on what your modems support. Check your modem manuals for specific instructions on connecting coaxial lines or setting up wired connections.
You only require a single modem, so there’s no need for an extra one.
You can connect your gaming PC to the Ethernet port using the DSL modem from another device.
Are these devices modems or are they router/modem combinations with several LAN connections? If they’re pure modems, you likely shouldn’t connect them together. If they’re combo units, you’ll have to route one of the LAN ports from the Xfinity modem into its LAN and then connect your PC via another port on the DSL unit. A switch offers a superior alternative. You can purchase a decent 5-port gigabit switch for around $15 and simply connect everything there (Line in → Xfinity → Switch → remaining connections).
they’re modem router bundles, but I’m planning to move the DSL modem roughly 100 feet away. From there, it should sit above the floor, allowing me to run cables underneath. That’s the issue I’ve encountered.
Are you relying solely on the DSL router for switching functions? Then check if you can turn off DHCP and connect it via a LAN port to the primary router.
Yes, you have internet service from both Century Link and Xfinity.