You could always purchase our own router to daisy chain off of your Comcast supplied modem/router, OR purchase your own modem only, as well.
i need modem/router with more than 2 ports
I have installed an 8-port gigabit switch connected to my XB6.
You could always purchase our own router to daisy chain off of your Comcast supplied modem/router
FWIW, If one hangs a stand-alone / separate router off of the gateway device, and the gateway is not in *bridge mode*, they are cascading 2 routing devices which results in an undesirable "double NAT" condition on the home network.
They can Google "double NAT" for info about its potential pitfalls.
They described a 2 port device which leads me to believe that they are talking about a straight cable modem lie the 8200B, and not a combo gateway or router. If that is the case, then they need to use a stand-alone router connected to one of the ports on the modem.
You really should put it in to bridge mode. Here's how;