[supertrope]

One cannot unplug the Comcast issued router, power cycle the modem, and plug in a customer owned router?

[StuffMaster]

All I see are combo units these days.

[iudqnolq]

You have to bring your own modem. Then you bring your own combo unit or bring your own modem that you can plug a router into.

[spookthesunset]

All the modems I see support bridge mode. When enabled the Comcast device doesn’t do any of the routing at all. Your own device gets to do that instead.

[to11mtm]

Yeah, even at my father's place (I've had different providers than Comcast for personal reasons, but FWIW same story) I've never had a problem just plugging in a router of my choice and using that instead. Makes it a lot easier to handle quirky setups between modem swaps anyway.