If you want to switch the device that gets assigned an IP address by Comcast's DHCP servers, all you need to do is reset the cable modem. At least that is how it always was for me.
I have a gigabit ethernet connection now, so I quit using a router. All the ones that I have couldn't manage more than 500 megabits/sec through the WAN port, even though they were supposedly gigabit.
I did some research at www.smallnetbuilder.com and I found that generally speaking, "gigabit router" actually means "router with a gigabit switch" unless you are buying something that isn't marketed to consumers.
I have a gigabit ethernet connection now, so I quit using a router. All the ones that I have couldn't manage more than 500 megabits/sec through the WAN port, even though they were supposedly gigabit.
I did some research at www.smallnetbuilder.com and I found that generally speaking, "gigabit router" actually means "router with a gigabit switch" unless you are buying something that isn't marketed to consumers.