I actually got two new routers, one wired and one wireless, with the goal of splitting the two into their own subnets, before realizing that I don’t know if the Xfinity modem/router will let me hook both up to it while it is in dumb “pass through” mode. I can always daisy-chain them, but that sorta defeats the point — at that point I may as well replace one of the routers with a dumb switch or wireless access point.